CN101598838A

CN101598838A - Optical detector for communication

Info

Publication number: CN101598838A
Application number: CNA2009101371883A
Authority: CN
Inventors: 小岛正嗣; 铃木香菜子; 中谷佳广; 石川俊彦; 西川贵雄; 伊东弘二郎; 末冈铁也
Original assignee: Hitachi Cable Ltd; NTT Communications Corp; Advanced Cable Systems Corp
Current assignee: NTT Communications Corp; Advanced Cable Systems Corp; Proterial Ltd
Priority date: 2008-05-15
Filing date: 2009-05-14
Publication date: 2009-12-09
Anticipated expiration: 2029-05-14
Also published as: JP2009276627A; CN101598838B; JP4927028B2

Abstract

The present invention relates to light and detect connector.The invention provides the non-visible light that a kind of use transmits and just can easily differentiate the user mode that have or not light transmission path in light transmission path with visual, and reliability height, cheap, optical detector for communication fault, simple in structure that can examine Communication ray connector self.A kind of optical detector for communication, the end that connects the light transmission path that is made of optical fiber by sleeve each other, and detection has or not the Communication ray of light transmission path at this connecting portion, possess: be arranged on the connecting portion in the sleeve, be connected to each other with the end of light transmission path, and have the light detection conjugant of the core of the external diameter different with the core of light transmission path; And be arranged on the top that light detects conjugant, detect the optical detection part that detects the Communication ray of conjugant leakage by light.

Description

Optical detector for communication

Technical field

The present invention relates to be arranged on the optical detector for communication of confirming the communication conditions of light transmission path in the light transmission path.

Background technology

In recent years, the optical fiber that in the communications field, can carry out at a high speed, high capacity transmits becomes the main flow of transmission line, and the further development that waits in expectation.Thereupon, particularly in the optical communication relevant device of data center or telecommunication bureau etc., carry out the construction of the change of light transmission path or discarded, increase etc. continually.

The Communication ray that transmits in the light transmission path of this optical communication relevant device is owing to be not at the non-visible light of visible region, thereby can not detect by an unaided eye and confirm.Therefore, be difficult for holding light transmission path and whether be in the utilization state that is being used, the assurance spended time that has its utilization state, perhaps the optical connector of the light transmission path that will use is thought the human error's that do not have to use and pull out etc. worry by mistake, thereby can not effectively utilize the problem of the untapped light transmission path in the optical communication relevant device.

So,, studied the method that much is used for the Visual Confirmation light transmission path for maintenance and the operation efficiency that improves the optical communication relevant device.

As the optical detector for communication of under the state that has connected optical fiber, confirming to have or not Communication ray, for example, end face at interior dress optical fiber and the hoop that in clamp coupling ground connection connected is provided with the gap to each other, the wave conductor that is made of translucent resin is set in this gap, accept the part of Communication ray of the top of guided wave conductor with fluorophor, detection has or not the transmission of Communication ray (for example, with reference to patent documentation 1: TOHKEMY 2004-170488 communique).

And, also proposed by between interior two hoops having adorned optical fiber, disposing optical waveguide substrate, the part of Communication ray is exported with optical waveguide substrate branch and to the Communication ray efferent, thereby confirm to have or not the method for Communication ray (for example, with reference to patent documentation 2: TOHKEMY 2004-133071 communique).

Also carried out using with a part of branch of Communication ray and the splitter of output, the research of optical detector for communication of structure that the visible light conversion element is installed at the terminal part of branched optical cable is (for example, with reference to patent documentation 3: TOHKEMY 2003-218813 communique).

Also has following technology: the end surface grinding of two optical fiber is at 45 and form branch's face, branch's film (optical filter) is clipped between this branch's face, (for example accept with PD (photodiode) by a part of Communication ray of branch's film reflection, with reference to patent documentation 4: TOHKEMY 2002-214487 communique), or the core of cut-out optical fiber, between this section, insert the optical filter or the semi-permeable mirror of the part of output communication light, make itself and photo detector optically-coupled and constitute the light receiving portion, the optical fiber end of this light receiving portion is connected (for example, with reference to patent documentation 5: TOHKEMY 2004-177549 communique) with outside by hoop.

Yet, in the optical detector for communication of patent documentation 1, owing in very narrow gap, wave conductor is set, so its assembling needs time and high-precision contraposition.And, because the light detection bodies is made of fluorophor, extremely short and affirmations that be difficult to detect by an unaided eye of its fluorescent lifetime, it is very difficult therefore using in the optical communication relevant device.

In addition, in patent documentation 1, owing to adorned the hoop of optical fiber in fixing by pressure welding etc., institute thereby, extract formed stress and have the situation that the wave conductor that is made of resin in the gap is peeled off or worn and torn that is arranged on owing to applying hoop (optical fiber) inserted.Exist thus can not be with Communication ray accurately to outside derivation etc., can not detect the problem of Communication ray and so on for a long time accurately.Have again, because the working power monitor is measured the loss of Communication ray and the length of adjusting play, so also there is the problem that is difficult to carry out the control between the gap.

In addition, in patent documentation 2, owing to must connect optical waveguide substrate and hoop and Communication ray efferent, therefore, its assembling still needs time and high-precision contraposition, and, because parts prices such as optical waveguide substrate are high,, realize that cost degradation is difficult therefore for further practicability.

Even in patent documentation 3, the fluorescent lifetime of visible light conversion element is also extremely short, is difficult to Visual Confirmation.

In

patent documentation

4,5, be used to detect optical filter or the semi-permeable mirror that has or not Communication ray though used, exist the size of detecting device integral body to become big, perhaps not only amount of parts increases, and detection sensitivity also depends on the problem of the position decline of PD.

In addition, though in

patent documentation

2,3, proposed optical branch mechanism by in the enclosure optical waveguide substrate etc. is set with a part of branch of Communication ray and take out, convert the part of the Communication ray that takes out to visible light, thereby can confirm whether the Communication ray by the light transmission path transmission is in the optical detector for communication of the state of positive transmission, but, if optical detector for communication self breaks down, then optical detector for communication just can not detect the Communication ray by the light transmission path transmission.Therefore, exist no matter just to be in which kind of state at transport communication light by light transmission path, the operator might property thinks it is the situation of pulling out optical connector by the state of light transmission path transport communication light of not carrying out by mistake.

Summary of the invention

So, the objective of the invention is to address the above problem, the non-visible light that provides a kind of use to transmit in light transmission path just can be with the visual optical detector for communication of easily differentiating the user mode that has or not light transmission path.

In addition, another object of the present invention is to improve that detection sensitivity depends on the position of photo detector and reduces in optical detector for communication.

In addition, another object of the present invention is to provide reliability height, cheap optical detector for communication.

In addition, another purpose of the present invention is to provide the optical detector for communication of the fault that can detect optical detector for communication self.

In addition, a further object of the present invention is to provide the simple structure with the assembling operation of the complexity of not carrying out high precision contraposition etc. just can take out the optical connector of the part of the Communication ray that transmits effectively in light transmission path.

In order to achieve the above object and the present invention of intention, it is a kind of optical detector for communication, in the end that connects the light transmission path that constitutes by optical fiber by sleeve each other, and detect at this connecting portion and have or not in the optical detector for communication of Communication ray of light transmission path, it possesses light and detects conjugant and optical detection part; This light detects conjugant and is arranged on above-mentioned connecting portion in the above-mentioned sleeve, is engaged with each other with the end of above-mentioned light transmission path, and has the core of the external diameter different with the core of above-mentioned light transmission path; This optical detection part is arranged on the top that above-mentioned light detects conjugant, detects the light leak that detects the Communication ray of conjugant leakage by above-mentioned light.

Above-mentioned light detects conjugant, and its axial length can equate with the distance from the core of above-mentioned light transmission path to the sensitive surface of the above-mentioned optical detection part of accepting above-mentioned light leak.

Above-mentioned light detect conjugant can also possess be arranged on above-mentioned core around and the cladding part of the external diameter identical with the covering of above-mentioned light transmission path.

Above-mentioned light detects conjugant can possess hoop.

Above-mentioned optical detection part can possess the photo detector of accepting above-mentioned light leak and will convert the light output part of visible light with the above-mentioned light leak that above-mentioned photo detector is accepted to.

Above-mentioned optical detection part can also possess informs that it has trouble-free fault detect portion.

Above-mentioned sleeve can constitute by seeing through the pottery of a part that detects the light leak of the Communication ray that conjugant leaks by above-mentioned light.

In order to achieve the above object and the present invention of intention, it is a kind of optical detector for communication, in the end that connects the light transmission path that constitutes by optical fiber by sleeve each other, and detect at this connecting portion and have or not in the optical detector for communication of Communication ray of light transmission path, it possesses light and detects conjugant and optical detection part; This light detects conjugant and is arranged on above-mentioned connecting portion in the above-mentioned sleeve, be engaged with each other with the end of above-mentioned light transmission path, and the light with the core that connects above-mentioned light transmission path detects with groove and is filled in this light and detects with the refractive index matched agent in the groove; This optical detection part is arranged on the top that above-mentioned light detects conjugant, detects the light leak that detects the Communication ray that leaks with groove by above-mentioned light; It is 50～150 μ m along the groove width that above-mentioned light detects the length direction of conjugant that above-mentioned light detects with groove.

Can be formed with the folding and unfolding groove of the above-mentioned optical detection part of folding and unfolding in the periphery of above-mentioned light detection conjugant, in this folding and unfolding groove, be formed with above-mentioned light detection groove.

Above-mentioned light detects the mode that can intersect with the inclined light shaft with above-mentioned light transmission path with groove and is formed obliquely.

Above-mentioned optical detection part can possess the photo detector of accepting light leak and will convert the light output part of visible light with the light leak that above-mentioned photo detector is accepted to.

Above-mentioned sleeve can constitute by seeing through by the pottery of above-mentioned light detection with the part of the light leak of the Communication ray of groove leakage.

The present invention provides a kind of optical detector for communication in order to achieve the above object, is possessing: be arranged on and connect on the light transmission path part each other, be used to take out the light unloading device by the part of the Communication ray of above-mentioned light transmission path transmission; And the optical detector for communication of optical detection part that is used for detecting the part of the above-mentioned Communication ray that takes out by above-mentioned smooth unloading device; It is provided with fault detect mechanism at above-mentioned optical detection part, and this fault detect mechanism has: be used to make fault detect light to the fault detect light illuminating part of above-mentioned smooth unloading device side outgoing and accept light accepting part by the above-mentioned fault detect light of above-mentioned smooth unloading device lateral reflection.

Above-mentioned fault detect light illuminating part can have: make the failure light emission test light source of above-mentioned fault detect light to the outgoing of above-mentioned smooth unloading device side; And the actuating mechanism that makes above-mentioned fault detect usefulness light source works.

Above-mentioned light accepting part can be to accept simultaneously from the above-mentioned fault detect light of above-mentioned fault detect light illuminating part with from the shared light receiving component of the part of the above-mentioned Communication ray of above-mentioned smooth unloading device.

Above-mentioned smooth unloading device can be arranged on inside and be equipped with on the conjugant with the optical fiber of above-mentioned light transmission path optically-coupled, and above-mentioned fault detect is provided with in the mode towards above-mentioned conjugant with light source.

Above-mentioned conjugant can be formed with grooving portion with the position of light source towards above-mentioned fault detect.

Above-mentioned conjugant can be provided with and make the reflection part of above-mentioned fault detect light to above-mentioned light receiving component reflection.

The optical connector of the present invention that proposes in order to achieve the above object, in being arranged at the optical connector that connects on the light transmission path part each other, it possesses conjugant, this conjugant has core and the cladding part with above-mentioned light transmission path optically-coupled, this conjugant has the refractive index lower than the refractive index of above-mentioned core, and possesses the light unloading device of a part that is used for taking out the above-mentioned Communication ray that transmits at above-mentioned core.

The light that above-mentioned smooth unloading device can be formed by the mode with the core that connects above-mentioned conjugant detects and constitutes with groove.

Above-mentioned light detects with groove can be vertically formed the position relative with above-mentioned sensitive surface at above-mentioned conjugant with the sensitive surface of above-mentioned light receiving component.

Above-mentioned light detects the mode that can intersect with the inclined light shaft with the core of above-mentioned conjugant with groove and is formed obliquely.

Above-mentioned conjugant can be formed with the folding and unfolding groove, and this folding and unfolding groove folding and unfolding is used to accept the light receiving component of the part of the above-mentioned Communication ray that taken out by above-mentioned smooth unloading device, is formed with above-mentioned light and detects and use groove in this folding and unfolding groove.

Above-mentioned light detects can be filled with the resin with refractive index lower than the core of above-mentioned conjugant with groove.

Above-mentioned conjugant can be made of the hoop that optical fiber is equipped with in inside, and this hoop is by seeing through above-mentioned leak light and the parts of its scattering being constituted.

Above-mentioned conjugant can possess two hoops that optical fiber is equipped with in inside, and forms above-mentioned light with two hoops of arranged spaced of regulation and detect and use groove, is filled with the resin with refractive index lower than the core of above-mentioned conjugant between two hoops.

The diameter of the core of above-mentioned optical fiber can with the equal diameters of the core that is bonded on the light transmission path on the above-mentioned conjugant, the cladding diameter of above-mentioned optical fiber is 40～125 μ m.

Can also possess optical detection part, this optical detection part has the light receiving component of a part that is used to accept the above-mentioned Communication ray that taken out by above-mentioned smooth unloading device and the output light output component with the light of this light receiving component acceptance.

Effect of the present invention is as follows.

According to the present invention, the non-visible light that use is transmitted in light transmission path, can not relying on fluorescent lifetime just can having or not with the visual user mode of differentiating light transmission path at an easy rate, the maintainability and the operation efficiency of light transmission path can be improved, and reliability height, cheap optical detector for communication can be realized.

According to the present invention, can provide the optical detector for communication of the fault that can detect optical detector for communication self.

According to the present invention, can provide simple structure just can take out the optical connector of the part of the Communication ray that in light transmission path, transmits efficiently with the assembling operation of the complexity that need not to carry out high precision contraposition etc.

Description of drawings

Fig. 1 is that (a) is the stereoscopic figure of the optical detector for communication of expression preferred first embodiment of the present invention, and Fig. 1 (b) is its vertical profile parallax stereogram.

Fig. 2 (a) is the longitudinal section at the main position of optical detector for communication shown in Figure 1, and Fig. 2 (b) is the figure of the Y direction position of its light leak detection sensitivity of expression, and Fig. 2 (c) is the enlarged drawing of connecting portion.

Fig. 3 (a) is the stereographic map of inner structure that the optical module of optical detector for communication shown in Figure 1 has been used in expression, and Fig. 3 (b) is the stereographic map of the inner structure of expression optical detection part.

Fig. 4 (a) is the longitudinal section of the optical detector for communication of expression comparative example, Fig. 4 (b) is the figure of the Y direction position of its light leak detection sensitivity of expression, Fig. 4 (c) is the figure of the X-direction position of its light leak detection sensitivity of expression, and Fig. 4 (d) is the figure of the Z-direction position of its light leak detection sensitivity of expression.

Fig. 5 is the vertical profile parallax stereogram of the optical detector for communication of expression second embodiment of the present invention.

Fig. 6 (a) is the longitudinal section of major part of the optical detector for communication of expression preferred the 3rd embodiment of the present invention, and Fig. 6 (b) is the cut-open view along its 6B-6B line.

Fig. 7 (a) is the stereoscopic figure of the optical detector for communication shown in Fig. 6 (a), and Fig. 7 (b) is its vertical profile stereographic map.

Fig. 8 (a) is the stereographic map of inner structure that the optical module of the optical detector for communication shown in Fig. 7 (a) has been used in expression, and Fig. 8 (b) is the stereographic map of the inner structure of expression optical detection part.

Fig. 9 is that expression light detects with the groove width of groove and the graph of a relation of light leak incidence.

Figure 10 (a)～Figure 10 (d) is the longitudinal section of an example of the manufacture method that detects conjugant of the light shown in the presentation graphs 6 (a).

Figure 11 is the longitudinal section of user mode of the optical detector for communication of presentation graphs 1.

Figure 12 (a) is the longitudinal section of major part of the optical detector for communication of expression the 6th embodiment mode of the present invention, and Figure 12 (b) is the cut-open view of its variation.

Figure 13 is the vertical profile stereographic map of the optical detector for communication shown in Figure 12 (a).

Figure 14 (a) is the longitudinal section (cut-open view along the 14A-14A line of Figure 14 (b)) of major part of the optical detector for communication of expression the 5th embodiment of the present invention, and Figure 14 (b) is the 14B-14B line cut-open view (from the being seen vertical view of PD side) along Figure 14 (a).

Figure 15 is the vertical profile stereographic map of the optical detector for communication of expression the 6th embodiment of the present invention.

Figure 16 is the stereoscopic figure of the optical detector for communication of expression the 7th embodiment of the present invention.

Figure 17 is the longitudinal section of major part of the optical detector for communication of expression the 8th embodiment of the present invention.

Figure 18 (a)～Figure 18 (c) is the longitudinal section of the employed conjugant of optical detector for communication shown in Figure 17, and Figure 18 (d), Figure 18 (e) are the being seen vertical views of A direction from Figure 18 (a), Figure 18 (b).

Figure 19 (a)～Figure 19 (c) is in the major part of the optical detector for communication of Figure 17, the longitudinal section of the state when expression makes the work of fault detect mechanism.

Figure 20 is the longitudinal section of major part of optical detector for communication of the variation of the 8th embodiment of the present invention.

Figure 21 is the longitudinal section of major part of optical detector for communication of the variation of the 8th embodiment of the present invention.

Figure 22 is the longitudinal section of major part of optical detector for communication of the variation of the 8th embodiment of the present invention.

Figure 23 is the longitudinal section of major part of optical detector for communication of the variation of the 8th embodiment of the present invention.

Figure 24 is the longitudinal section of major part of optical detector for communication of the variation of the 8th embodiment of the present invention.

Figure 25 is the vertical profile parallax stereogram of optical detector for communication shown in Figure 20.

Figure 26 (a) is the longitudinal section of major part of the optical connector of expression the 9th embodiment of the present invention.Figure 26 (b) and Figure 26 (c) are its A portion enlarged drawings.

Figure 27 (a) is the longitudinal section of the conjugant that uses in the optical connector shown in Figure 26 (a), and Figure 27 (b) and Figure 27 (c) are the being seen vertical views of B direction from Figure 27 (a).

Figure 28 is the vertical profile stereographic map of the optical connector shown in Figure 26 (a).

Figure 29 is that the light of expression when making light detect variations in refractive index with groove detects with the groove width of groove and the graph of a relation of light leak incidence.

To be the light detection efficiency of expression when making light detect variations in refractive index with groove detect graph of a relation with the distance of the center of groove to distance light to Figure 30.

Figure 31 is the longitudinal section of major part of variation of the optical connector of the 9th embodiment of the present invention.

Figure 32 is the longitudinal section of the employed conjugant of variation device of the optical connector of the 9th embodiment of the present invention.

The longitudinal section of the employed conjugant of variation of the optical connector of Figure 33 (a) the 9th embodiment of the present invention, Figure 33 (b) have been to use the longitudinal section of major part of the optical connector of this conjugant.

Figure 34 is the optical connector of the 9th embodiment of the present invention and the stereographic map of photodetector.

Figure 35 is the optical connector of Figure 34 and the longitudinal section of photodetector.

Among the figure: 1,41,51,101,201,301, the 401-optical detector for communication, 1A, the 1B-optical connector, the 1b-detector body, 2,2a, 2b, 106c, 106y-optical fiber, 5a, 5b, 50,60c, 60y, 104c, the 104y-hoop, 6,6a, 6b, 62a, the 62b-sleeve, 7,82, the 92-conjugant, 8-transmission path, 9-core, the 10-cladding part, 11-hoop portion, 12, the 109-optical detection part, 13,110a, the 110b-PD element, 14,111-PD, 15-light entrance port, the 16-shell, the 17-cover, 18c, 18y-optical connector adapter, 19c, 19y-connector locking plate, 20C, the 20Y-sleeve rack, 21c, 21y-sleeve rack retractable room, 22-main body retractable room, 23-PD retractable room, the 24-holding section, 25-covers locking plate, and 26-covers lockhole, 27-circuit board, the 28-light output part, 29,52,122-fault detect portion, 31-optical module, 32-housing, the 32d-lower house, the 32u-lid, 33c, 33y-optical connector latch, the surplus long folding and unfolding of 34-portion, the 35-power feeding section, the 36-service cable, 38,48,78a, 78b, 98-light detects uses groove, 54-light receiving component, the 55-light output component, 57-fault detect light source, 58-actuating mechanism, 59-fault light illuminating part, 63,103-light unloading device, 64,72-folding and unfolding groove, 68-folding and unfolding groove bottom, 70-grooving portion, the 71-reflection part, the 203-ferrule holder, 204-guiding groove, 205-shank, the 206-basket, the 207-battery, 208-cap, 210-patchhole, the gap of 213-two conjugants

Embodiment

Below, with reference to accompanying drawing preferred implementation of the present invention is described.

At first, use Fig. 1～Fig. 5 that first embodiment of the present invention is described.

Below, use Fig. 1 (a) and Fig. 1 (b) that the one-piece construction of optical detector for communication is described.

Shown in Fig. 1 (a) and Fig. 1 (b), optical detector for communication 1 be possess its major part of folding and unfolding square tubular shell 16 and be arranged on the middle body on this shell 16 and cover the optical detector for communication of optical adapter (adapter) type of cover 17 of the case shape of optical detection part 12.

Shell 16 one ends (left side among Fig. 1) are the optical connector adapter 18c of equipment side, and the other end (right side among Fig. 1) is the optical connector adapter 18y of user side.In the optical connector adapter 18c of equipment side, be provided with and be used for inserting in advance the optical connector latch of equipment side and be fixedly coupled device locking plate 19c.Equally, in the optical connector adapter 18y of user side, be provided with and be used for fixing the connector locking plate 19y that inserts the optical connector latch extract the user side that is provided with freely.

Ratio connector locking plate 19c in the optical connector adapter 18c of equipment side is formed with the sleeve rack retractable room 21c of the sleeve rack 20c of retractable equipment side in the inner part, and the sleeve rack 20c quilt folding and unfolding in advance of equipment side is in this sleeve rack retractable room 21c.Equally, the ratio connector locking plate 19y in the optical connector adapter 18y of user side is formed with the sleeve rack retractable room 21y of the sleeve rack 20y of folding and unfolding user side in the inner part, and the sleeve rack 20y quilt folding and unfolding in advance of user side is in this sleeve rack retractable room 21y.

Central portion in shell 16 is formed with the main body retractable room 22 of folding and unfolding detector body 1b, and this detector body 1b detects conjugant 7 by a sleeve 6 and light and constitutes, and the folding and unfolding in advance of detector body 1b quilt is in this main body retractable room 22.The top of the main body retractable room 22 in shell 16 is formed with the PD retractable room 23 of folding and unfolding PD14.

Be formed with optical detector for communication 1 folding and unfolding in advance in the two sides of shell 16 and be fixed on holding section 24 on the optical module set on the optical communication relevant device.Be respectively equipped with in four bights of the central portion of shell 16 and above shell 16, erect and be used for will the cover 17 cover locking plates 25 that are fixed on the shell 16.

Be formed with respectively the cover lockhole 26 chimeric with each cover locking plate 25 in cover 17 two sides.Folding and unfolding has circuit board 27 in cover 17.Cover 17 uses and to have or not communication to be roughly material transparent making with LED and testing circuit fault with the light of LED outgoing to differentiation described later.

On the other hand, optical detection part 12 possesses: PD element 13 (with reference to Fig. 2 described later (a)), to convert the light output part 28 of visible light with the light leak E (with reference to Fig. 2 described later (c)) that this PD element 13 is accepted to, inform that circuit board 27 has trouble-free fault detect portion 29, and carry these PD elements 13, light output part 28, fault detect portion 29 and constitute the circuit board 27 of optical detection circuit.

In addition, in the present embodiment, have or not communication to use the LED of outgoing red light, used the LED of outgoing blue light as the testing circuit fault with LED with LED as differentiation.Thus, the color relation of the light by visual outgoing can be distinguished simply to differentiate and have or not communication and testing circuit fault, can make the reliability of optical detector for communication 1 higher.

In the present embodiment, as light output part 28, the differentiation of bright lamp, light-off when not transmitting has or not communication LED (light emitting diode) when having used Communication ray to transmit between optical fiber 2a, 2b.As fault detect portion 29, circuit board 27 (when for example not powering) bright lamp, testing circuit fault LED of turning off the light when not having fault when breaking down or do not work have been used.

For example, in the occasion (when having only blue light) of only sending blue light with LED with the testing circuit fault, expression optical detector for communication 1 is not worked and not communication, has or not communication with the occasion (when having only ruddiness) that LED sends ruddiness in differentiation, represents optical detector for communication 1 work and communication.In a word, use the different LED of color can distinguish optical detector for communication 1 more simply non-fault, communication are arranged.

Fig. 2 (a) is the longitudinal section of major part of the optical detector for communication of expression preferred first embodiment of the present invention.

Shown in Fig. 2 (a), the optical detector for communication 1 of first embodiment is arranged on the optical communication relevant device of for example data center or telecommunication bureau etc. and uses, to dock the connecting portion of the optical fiber of connection each other as the end of the optical fiber of light transmission path, monitor the user mode of light transmission path and detect the parts that have or not Communication ray (whether carrying out optical communication).

This optical detector for communication 1 possesses the detector body 1b that is made of sleeve 6 and light detection conjugant 7, this sleeve 6 is used to insert inner respectively being equipped with as the hoop 5a of optical fiber 2a, the 2b of light transmission path, the end of 5b, and carries out the optical axis contraposition of

hoop

5a, 5b; This light detects conjugant 7 and is arranged in this sleeve 6, is engaged with each other with the end (end of the connecting portion side of optical fiber) of

optical fiber

2a, 2b, and has (the diameter difference of core) core 9 of the external diameter different with the core 3 of

optical fiber

2a, 2b.

Constitute by core 3 and covering 4 as each

optical fiber

2a, 2b of being inserted into the light transmission path in the optical detector for communication 1.These

optical fiber

2a, 2b generally use the single-mode fiber of quartz glass system or the multimode optical fiber of GI (graded index) type.Use the occasion of single-mode fiber as each

optical fiber

2a, 2b, use the Communication ray of wavelength as 1310nm frequency band or 1550nm frequency band.As each optical fiber but, use the Communication ray of wavelength as 850nm frequency band or 1310nm frequency band with the occasion of multimode optical fiber.

The light that hoop 5a is loaded on equipment side connects in the latch 33c (with reference to Fig. 3 described later (a)), and hoop 5b is loaded in the optical connector latch 33y (with reference to Fig. 3 described later (a)) of user side.These

hoops

5a, 5b make of pottery or metal, and its end face (end face of the connecting portion side of optical fiber) is ground into PC (physics contact) end face.

Sleeve 6 uses the ceramic of at least a portion (perhaps accepting to make its scattering behind the Communication ray) that sees through Communication ray or the parts of glass, perhaps has ceramic, glass, the metal clamp coupling of the slit that extends to length sleeve direction (axially).Pottery as at least a portion that sees through Communication ray has for example zirconia ceramics.

Light detects conjugant 7 and comprises: with center, the end core that engages 9 each other of the core 3 of

optical fiber

2a, 2b; Be arranged on this core 9 around and the identical cladding part 10 of covering 4 of external diameter and

optical fiber

2a, 2b; And the hoop portion 11 on every side that is arranged on this cladding part 10.The part that is made of core 9 and cladding part 10 among this light detection conjugant 7 becomes the light transmission path 8 of detection side.

Light detects the core of conjugant 7 9With making with core 3 identical materials of each

optical fiber

2a, 2b, cladding part 10 usefulness are made with covering 4 identical materials of each optical fiber 2a, 2b.The both ends of the surface of the length direction of the optical fiber of light detection conjugant 7 are in order to realize the PC connection and to be ground into the PC end face with the end face (end face that is connected side of optical fiber) of each optical fiber 2a, 2b.The external diameter (external diameter of hoop portion 11) that light detects conjugant 7 is identical or slightly littler than them with the external diameter φ f of each

hoop

5a, 5b.

The junction surface that light detects conjugant 7 and optical fiber 2a is the occasion of hollow arrow in the light incident direction, shown in Fig. 2 (c), also becomes because of the different places that loss takes place of the diameter of core.In the light incident direction be blacking arrow occasion too.Therefore, the diameter of the core of the core 9 of setting light detection conjugant 7 makes Communication ray C see through the junction surface J that light detects conjugant 7 and optical fiber 2a, and the transmission loss when its part is leaked as light leak E is at 1～2dB of the scope that optical communication is not made a very bad impression.The diameter that the core 9 of light detection conjugant 7 can be made into core is about 2～3 μ m.

In the present embodiment, though the little example of diameter that detects the diameter of core of the core 9 of conjugant 7 with light and be than the core of the core 3 of

optical fiber

2a, 2b is illustrated, otherwise, the diameter of core that detects the core of conjugant at light be than the big occasion of diameter of the core of the core 3 of

optical fiber

2a, 2b, also has and the same effect of Fig. 2 (c).This occasion, the external diameter of the external diameter of the cladding part of light detection conjugant 7 and the covering 4 of

optical fiber

2a, 2b is also identical

Return Fig. 2 (a), optical detector for communication 1 possesses the top that is arranged on light detection conjugant 7 and detects the optical detection part 12 that detects the light leak E of conjugant 7 leakages by this light.In detail, optical detection part 12 is configured in light in the parallel mode of the sensitive surface of accepting light leak E and light transmission path and detects on conjugant 7 and the sleeve 6 relevant symmetrical positions.In Fig. 2 (a), only described PD14, this PD14 constitutes the part of optical detection part 12 and possesses as the PD element 13 of accepting the photo detector of light leak E.In the present embodiment, used the PD of cheap jar packaged type as PD14.

Light detects conjugant 7, its axial length L with equate to be advisable apart from Q from the sensitive surface of core 3 to the PD elements 13 of each optical fiber 2a, 2b.This occasion, owing to about 50% of light leak E incides among the PD14, so the detection sensitivity maximum of light leak.

Promptly, in each

hoop

5a, 5b of diameter of phi f, because from the distance of the sensitive surface of the light entrance port 15 to PD13 of PD14 is that Lr, hoop radius are Φ f/2, so be made as d as if thickness, then becoming of the sensitive surface from loss occurrence to PD element 13: Q=Lr+ (Φ f/2)+d apart from Q with sleeve 60.And, if the length L of this moment with equate apart from Q (in general hoop, owing to Φ f=2.5mm, so length L and be roughly 2.35mm+d apart from Q), then the detection sensitivity of light leak E is the best.

Secondly, use Fig. 3 (a) and Fig. 3 (b), an example of the optical module that used optical detector for communication 1 is described.

Shown in Fig. 3 (a) and Fig. 3 (b), optical module (the pre-Wiring module of light) 31 mainly in housing 32 folding and unfolding a plurality of (in Fig. 3 (a), being four) optical detector for communication 1 constitute.As optical module 31, intensive device of the light in for example being arranged on the optical communication relevant device or the optical terminus case, also can enumerate built on stilts light barrier etc.

Housing 32 is made of with the lid 32u that switching is arranged on this lower house 32d freely lower house (carriage that the folding and unfolding optical fiber is used) 32d of case shape.In the present embodiment, used by have or not communication with LED and testing circuit fault the wide lid that causes the material transparent making for above-mentioned differentiation as lid 32u with the LED outgoing.

In the end of lower house 32d, with mode folding and unfolding of giving prominence to the length direction of lower house 32d and the optical connector adapter 18y that is fixed with the user side of each optical detector for communication 1.On the optical connector adapter 18y of each user side, insert to extract respectively and be provided with the optical connector latch 33y that the user side of optical fiber 2b and hoop 5b (with reference to Fig. 2 (a)) is equipped with in inside freely.In the present embodiment, an example of the optical connector that constitutes as the optical connector latch 33y by the optical connector adapter 18y of user side and user side has used the SC optical connector.

In the optical connector adapter 18c of the equipment side of each optical detector for communication 1, insert respectively in advance and fixing internal is equipped with the optical connector latch 33c of the equipment side of optical fiber 2a and hoop 5a (with reference to Fig. 2 (a)).

In the occasion of using light transmission path, by in the optical connector adapter 18y of the user side of employed light transmission path, inserting and the optical connector latch 33y of fixed-line subscriber side, thereby make as the optical fiber of the light transmission path of user side with as the optical fiber 2a optically-coupled of the light transmission path of equipment side.

In lower house 32d, be provided with the optical fiber residue length folding and unfolding portion 34 of the residue length of the optical fiber 2a that the optical connector adapter 18c that is used for folding and unfolding slave unit side prolongs.Each optical fiber 2a bands together many by optical fiber residue length folding and unfolding portion 34, is connected as the outside of optical cable with optical module 31.

In lower house 32d, between each optical detector for communication 1 and optical fiber residue length folding and unfolding portion 34, be provided with power feeding section 35 to optical detection part 12 supply capabilities.The circuit board 27 of this power feeding section 35 and each optical detector for communication 1 is connected with service cable 36 respectively.Use battery and solar panel as power feeding section 35.

Below, the effect of first embodiment is described.

Insert the also optical connector latch 33y of fixed-line subscriber side among the optical connector adapter 18y of the user side on employed light transmission path, make the structure of slave unit side towards user side communication.

This occasion, shown in Fig. 2 (a) and Fig. 2 (c), Communication ray C arrives the junction surface J that optical fiber 2a and light detect conjugant 7 by the optical fiber 2a in the hoop 5a in the optical connector that is contained in equipment side.

Communication ray C is by behind the J of junction surface, because the diameter of the core of the core 9 of light detection conjugant 7 is littler or big than the diameter of the core of the core of optical fiber 2a, so the part of Communication ray C is leaked as light leak E, this leak light E is from the core end face expansion of optical fiber 2a.

The light leak E of this expansion is by the slit of sleeve 6, perhaps its part sees through sleeve 6, electric signal is accepted and converted to PD element 13 by optical detection part 12, and this electric signal transmits in circuit board 27 and converts the visible light outgoing to by the light output part 28 of optical detection part 12.The occasion that communicates towards equipment side from user side too.

Have or not this visible light by operator's visual inspection, thereby in the optical module 31 of for example Fig. 3 (a), can confirm whether to have used which light transmission path simply.

Like this, because optical detector for communication 1 possesses in sleeve 6 and light detection conjugant 7 as the core 9 of the diameter of the different core of the core 3 of optical fiber 2a, the 2b of light transmission path, therefore, as long as set the diameter of the core of core 9, the amount that just can take out desirable light leak E from Communication ray C simply.

And, because light detection conjugant 7 has core or roughly same structure, the material of covering with optical fiber, and have that to have adorned external diameter as hoop 5a, the 5b of optical fiber 2a, the 2b of light transmission path identical or than its little external diameter with inside, therefore can make simply with low cost, the connection of

optical fiber

2a, 2b or

hoop

5a, 5b is also simple.

Therefore,, use the non-visible light that in light transmission path, transmits, do not rely on fluorescent lifetime and just can with the naked eye easily differentiate the user mode that has or not light transmission, can improve the maintenance or the operation efficiency of communication transmission path according to optical detector for communication 1.

In addition, put optical detection part 12 because optical detector for communication 1 is provided with above light detection conjugant 7, therefore compare with the occasion that photo detector is housed in optical connector inside, with low cost, the structure of detecting device self is also simple.

At this, the present inventor is in order to confirm whether realized another object of the present invention in optical detector for communication, be that detection sensitivity depends on the position of photo detector (for example PD) and reduces and improves, make the optical detector for communication 41 shown in Fig. 4 (a) as the comparative example of optical detector for communication 1, and detected its light leak detection sensitivity.

The optical detector for communication 41 of comparative example is filled refractive index matched agent m in the mode that is provided with gap g4 between

hoop

5a, 5b in each optical connector of light transmission path, by detect the light leak of the Communication ray that takes place by gap g4 with the PD element 13 of PD14, have or not Communication ray thereby detect.

But, in optical detector for communication 1,41, make the length L 6 of sleeve 60 be 11.4mm, making the external diameter Φ f of

hoop

5a, 5b is 2.5mm, making from the distance L r of the sensitive surface of light entrance port 15 to the PD elements 13 of PD14 is 1.1mm.The reference point of light leak detection sensitivity is light entrance port 15 (among Fig. 2 (a), Fig. 4 (a) ●).

Shown in Fig. 4 (b)～Fig. 4 (d), in optical detector for communication 41, about X-axis, Z-direction, though the light leak detection sensitivity does not change in the light incident direction, but about Y direction (fiber length), then the position of maximum detection sensitivity depends on the light incident direction and bigger variation has taken place.

To this, optical detector for communication 1 has and utilizes light to detect conjugant 7 to depend on the incident direction of light and the structure of difference (place of generation light leak E is two places) in hoop 5a, loss occurrence place of 5b chien shih.

Therefore, the light leak detection sensitivity of the Y direction of optical detector for communication 1 is shown in Fig. 2 (b), and the position of maximum detection sensitivity does not rely on the light incident direction, compares with optical detector for communication 41, can make the light leak detection sensitivity improve about 1.3 times.

In addition, according to the optical detector for communication 1 of Fig. 1, the light that possesses core 9 only is set detects conjugant 7, this core 9 has the external diameter different with the core of light transmission path, thereby do not need optical waveguide substrate as the optical detector for communication of prior art etc., do not need high-precision contraposition.

Have again, have the effect same,, can also reduce amount of parts so compare with existing optical detector for communication with existing hoop because light detects conjugant 7.

In addition, the optical detector for communication 51 of second embodiment as shown in Figure 5 is such, except the structure of the optical detector for communication 1 of Fig. 1, can also possess the fault detect portion 52 of informing that PD element 13 or light output part 28 have trouble-free optical element to use of being used to.The fault detect portion 52 that uses as optical element can use the optical element fault detect LED that carries out ON/OFF by switch.

This occasion forms by the side of PD14, the back side and the sleeve 6 of circuit board 27 in the PD of shell 16 retractable room 23 1 sides and to divide the space S 5 that forms, be positioned at this space S 5 above the fault detect portion 52 that uses of the back side lift-launch optical element of circuit board 27.

In optical detector for communication 51, when the operator connects switch, then to use up to sleeve 6 outgoing fault detects from the fault detect portion 52 that optical element is used, this fault detect is used up by inciding PD element 13 by sleeve 6 reflections (or scattering).

Do not have the occasion of fault at PD element 13 or light output part 28, the operator is by detecting by an unaided eye from the visible light of light output part 28 outgoing, thereby optical element does not have fault as can be known.In addition, at PD element 13 or light output part 28 occasion of fault has taken place, though since the operator connect switch can be from light output part 28 outgoing visible lights yet, thereby fault has taken place in optical element as can be known.

Below, use accompanying drawing 6～Figure 11 that the 3rd embodiment of the present invention is described.

Shown in Fig. 6 (a) and Fig. 6 (b), the optical detector for communication 101 of the 3rd embodiment is arranged on the optical communication relevant device of for example data center or telecommunication bureau etc. and uses, to dock the connecting portion of the optical fiber of connection as the end of the optical fiber of light transmission path each other, and monitor the user mode of light transmission path and detect the parts that have or not Communication ray (whether carrying out optical communication).

This optical detector for communication 101 possesses light and detects sleeve 6a, the 6b that both ends that conjugant 7 and this light detects conjugant 7 are inserted into respectively.When using optical detector for communication 101, the both ends of the surface that detect conjugant 7 at light are inserted the hoop 104y (with reference to Figure 11 described later) that hoop 104c (with reference to Figure 11 described later) that the optical connector of equipment side possesses and the optical connector of user side possess respectively and are docked and are connected.The optical fiber 106c (with reference to Figure 11 described later) of equipment side is housed in hoop 104c inside, the optical fiber 106y (with reference to Figure 11 described later) of user side is housed in hoop 104y inside.

Light detects conjugant 7 and comprises: dock the core 9 that is connected each other with the end (end of the connecting portion side of optical fiber) of the core of optical fiber 106c, 106y, surround the cladding part 10 of this core 9, be arranged on the hoop portion 11 on every side of this cladding part 10, connect the light that forms from outer peripheral face to the core 9 of the central portion upside of cladding part 10 and detect, and be filled in this light and detect with the refractive index matched agent r in the groove 38 with groove 38.

The both ends of the surface that light detects conjugant 7 its length directions are engaged with each other with the end face of hoop 104c, 104y respectively.Detect in conjugant 7 at this light, the light of having filled refractive index matched agent r by core 9, cladding part 10 and in the face of these cores 9 and cladding part 10 detects the part that constitutes with groove 38 becomes detection side light transmission path 8.

Light detects conjugant 7 its core 9 usefulness and makes with the core identical materials of each optical fiber 106c, 106y, and cladding part 10 usefulness are made with the covering identical materials of each optical fiber 106c, 106y.Hoop portion 7 usefulness that light detects conjugant 7 and each hoop 104c, 104y or sleeve 3a, 3b identical materials are made.Core 9 and cladding part 10 both can use optical waveguide, also can be only will use as core 9 and cladding part 10 with the same optical fiber of each optical fiber 106c, 106y.

Light detects the both ends of the surface of length direction of conjugant 7 in order to realize that PC (physics contact) is connected and is ground into the PC end face with the end face (end face of the connecting portion side of optical fiber) of each hoop 104c, 104y in inserting optical detector for communication 101.The external diameter that light detects conjugant 7 is identical with the external diameter of each hoop 104c, 104y.

It is 50～150 μ m that light detects with groove 38 its groove width w along the length direction of light detection conjugant 7, preferred 10～40%, more preferably 20～30%.During groove width w less than 50 μ m, the light leak incidence is too small, is difficult to detect light leak, and maybe the light leak that receives being converted to needs amplifier in addition behind the electric signal and cause amount of parts to increase.In addition, if groove width w surpasses 150 μ m, then the light leak incidence is excessive and communication is produced obstacle.

If groove width w is 50～150 μ m, then as shown in Figure 9, in the communication light wavelength is that the MFD (mode field diameter) of 1310nm, optical fiber is that the refractive index (refractive index of refractive index matched agent r) of 9.2 μ m, slot part is 1.4537 occasion, and the incidence that detects with the light leak of groove 38 generations at light is 10～50%.

Use the single-mode fiber of quartz glass system or the multimode optical fiber of GI (graded index) type as each optical fiber 106c, 106y of inserting the light transmission path in the optical detector for communication 101.Use the occasion of single-mode fiber as each optical fiber 106c, 106y, use the Communication ray of wavelength as 1310nm frequency band or 1550nm frequency band.Use the occasion of multimode optical fiber as each optical fiber, use the Communication ray of wavelength as 850nm frequency band or 1310nm frequency band.In these each Communication rays, detect too with the relation of the groove width of groove and light leak incidence with the light of Fig. 9 explanation.

Return Fig. 6 (a) and Fig. 6 (b), be filled in light and detect the roughly the same matching agent of core of using refractive index and each optical fiber 106c, 106y with the refractive index matched agent r in the groove 38.As refractive index matched agent r, both can use aqueous matching agent, also can use indurative resin of thermosetting or ultraviolet ray (UV) or bonding agent refractive index after sclerosis and the roughly the same matching agent of core of each optical fiber 106c, 106y.

Sleeve 6a is used to carry out the optical axis contraposition of hoop 104c and light detection conjugant 7, and sleeve 6b is used to carry out the optical axis contraposition of hoop 104y and light detection conjugant 7.

In addition, hoop 104c is contained in the optical connector latch 33c interior (with reference to Fig. 8 described later (a)) of equipment side, and hoop 104y is contained in the optical connector latch 33y interior (with reference to Fig. 8 described later (a)) of user side.These hoops 104c, 104y make of pottery or metal, and its end face (end face of the connecting portion side of optical fiber) grinds to form PC (physics contact) end face.

Sleeve

6a, 6b use the ceramic of at least a portion (perhaps accepting to make its scattering behind the Communication ray) that sees through Communication ray or the parts of glass, perhaps have ceramic, glass, the metal clamp coupling of the slit that extends to length sleeve direction (axially).Pottery as at least a portion that sees through Communication ray has for example zirconia ceramics.

Optical detector for communication 101 also possesses the top that is arranged on light detection conjugant 7 and detects the optical detection part 12 that detects the light leak of using groove 38 leakages by light.In Fig. 6 (a) and Fig. 6 (b), only described PD14, this PD14 constitutes the part of optical detection part 12 and possesses as the PD element 13 of accepting the photo detector of light leak.The PD element 13 that optical detection part 12 will be used to accept light leak and light detect relative and be configured between sleeve 6a, the 6b with the top of groove 38.In the present embodiment, used the PD of cheap jar packaged type as PD14.

Use Fig. 7 (a) and Fig. 7 (b) that optical detector for communication 101 is described in further detail.

Shown in Fig. 7 (a) and Fig. 7 (b), optical detector for communication 101 be possess its major part that folding and unfolding illustrates in Fig. 6 (a) square tubular shell 16 and be arranged on the central portion on this shell 16 and cover optical adapter (adapter) the type optical detector for communication of cover 17 of the case shape of optical detection part 12.

Shell 16 one ends (left side among Fig. 7) are the optical connector adapter 18c of equipment side, and the other end (right side among Fig. 7) is the optical connector adapter 18y of user side.In the optical connector adapter 18c of equipment side, be provided with and be used for inserting in advance the optical connector latch of equipment side and be fixedly coupled device locking plate 19c.Equally, in the optical connector adapter 18y of user side, be provided with and be used for fixing the connector locking plate 19y that inserts the optical connector latch extract the user side that is provided with freely.

Central portion in shell 16 is formed with the main body retractable room 22 of folding and unfolding detector body 1b, this detector body 1b detects conjugant 7 by two

sleeve

6a, 6b and a light remaining on inboard between these

sleeves

6a, 6b and constitutes, detector body 1b by folding and unfolding in advance in this main body retractable room 22.The top of the main body retractable room 22 in shell 16 is formed with the PD retractable room 23 of folding and unfolding PD14.

Be formed with in the two sides of shell 16 and be used for optical detector for communication 101 folding and unfolding in advance and be fixed on holding section 24 on the optical module set on the optical communication relevant device.Be respectively equipped with in four bights of the central portion on the shell 16 and erect above shell 16 that be used for will the cover 17 cover locking plates 25 that are fixed on the shell 16.

Be formed with respectively the cover lockhole 26 chimeric with each cover locking plate 21 in cover 17 two sides.Folding and unfolding has circuit board 27 in cover 17.Cover 17 usefulness have or not communication to make of the wide material transparent that causes of LED outgoing of LED and testing circuit fault for differentiation described later.

On the other hand, optical detection part 12 possesses: above-mentioned PD element 13, to convert the light output part 28 of visible light with the light leak that this PD element 13 is accepted to, inform that circuit board 27 has trouble-free fault detect portion 29, and carry these PD elements 13, light output part 28, fault detect portion 29 and constitute the circuit board 27 of optical detection circuit.

In addition, in the present embodiment, have or not communication to use the LED of outgoing red light, used the LED of outgoing blue light as the testing circuit fault with LED with LED as differentiation.Thus, the color of the light by visual outgoing and can have or not communication and testing circuit fault to distinguish to differentiation simply can make the reliability of optical detector for communication 101 higher.

In the present embodiment, as light output part 28, the differentiation of bright lamp, light-off when not transmitting has or not communication LED (light emitting diode) when having used Communication ray to transmit between optical fiber 106c, 106y.As fault detect portion 29, circuit board 27 (when for example not powering) bright lamp, testing circuit fault LED of when not having fault, turning off the light when breaking down or do not work have been used.

For example, in the occasion (when having only blue light) of only sending blue light with LED with the testing circuit fault, expression optical detector for communication 101 is not worked and is not communicated, have or not communication to send the occasion (when having only ruddiness) of ruddiness in differentiation, expression optical detector for communication 101 work and communicating with LED.In a word, use the different LED of color can distinguish optical detector for communication 101 more simply non-fault, communication are arranged.

Secondly, use Fig. 8 (a) and Fig. 8 (b) that an example of the optical module that used optical detector for communication 101 is described.

Shown in Fig. 8 (a) and Fig. 8 (b), optical module (the pre-Wiring module of light) 31 mainly in housing 32 folding and unfolding a plurality of (in Fig. 3 (a), being four) optical detector for communication 101 constitute.As optical module 31, intensive device of the light in for example being arranged on the optical communication relevant device or the optical terminus case, also can enumerate built on stilts light barrier etc.

In the end of lower house 32d, with mode folding and unfolding of giving prominence to the length direction of lower house 32d and the optical connector adapter 18y that is fixed with the user side of each optical detector for communication 101.On the optical connector adapter 18y of each user side, insert to extract respectively and be provided with the optical connector latch 33y that the user side of optical fiber 106y and hoop 104y (with reference to Figure 11) is equipped with in inside freely.In the present embodiment, an example of the optical connector that constitutes as the optical connector latch 33y by the optical connector adapter 18y of user side and user side has used the SC optical connector.

In the optical connector adapter 18c of the equipment side of each optical detector for communication 101, insert respectively in advance and fixing internal is equipped with the optical connector latch 33c of the equipment side of optical fiber 106c and hoop 104c (with reference to Figure 11).

In the occasion of using light transmission path, by in the optical connector adapter 18y of the user side of employed light transmission path, inserting and the optical connector latch 33y of fixed-line subscriber side, thereby make as shown in figure 11 as the optical fiber 106y of the light transmission path of user side with as the optical fiber 106c optically-coupled of the light transmission path of equipment side.

Return Fig. 8 (a) and Fig. 8 (b), in lower house 32d, be provided with the optical fiber residue length folding and unfolding portion 34 of the residue length of the optical fiber 106c that the optical connector adapter 18c that is used for folding and unfolding slave unit side prolongs.Each optical fiber 106c bands together many by optical fiber residue length folding and unfolding portion 34, is connected as the outside of optical cable with optical module 31.

In lower house 32d, between each optical detector for communication 101 and optical fiber residue length folding and unfolding portion 34, be provided with power feeding section 35 to optical detection part 12 supply capabilities.The circuit board 27 of this power feeding section 35 and each optical detector for communication 101 is connected with service cable 36 respectively.Use battery and solar panel as power feeding section 35.

Here, use Figure 10 (a)～Figure 10 (d) that the example that light detects the manufacture method of conjugant 7 is described.

At first, the prefabricated light detection conjugant 7p (with reference to Figure 10 (a)) that preparation is made of core 9, cladding part 10 and hoop portion 11 is by groove processing formation light detection groove 38 (Figure 10 (b)) on this prefabricated light detection conjugant 7p of die sinking or etching etc.

Then, detect with inserting filling unhardened refractive index matched agent sr (Figure 10 (c)) in the groove 38 at light, the unhardened refractive index matched agent sr that is filled is implemented thermal treatment, dried, after perhaps shining UV and making its sclerosis, obtain the light shown in Fig. 6 (a) and Fig. 6 (b) and detect conjugant 7 (Figure 10 (d)).

Below, the effect to the 3rd embodiment is described.

Insert the also optical connector latch 33y of fixed-line subscriber side among the optical connector adapter 18y of the user side on employed light transmission path, make the structure of slave unit side direction user side communication.

This occasion, shown in Fig. 6 (a), Communication ray arrives the light detection groove 38 that light detects conjugant 7 by the optical fiber 106c in the hoop 104c in the optical connector that is contained in equipment side.After Communication ray incided in the light detection usefulness groove 38, the part of Communication ray was leaked as light leak, and this light leak is from the end face expansion of core 9.

The light leak of this expansion detects with the refractive index matched agent r in the groove 38 by PD element 13 acceptance of optical detection part 12 and convert electric signal to by being filled into light, and this electric signal transmits in circuit board 27 and converts the visible light outgoing to by the light output part 28 of optical detection part 12.The occasion that communicates to equipment side from user side too.

Have or not this visible light by operator's visual inspection, thereby in the optical module 31 of for example Fig. 8 (a), can confirm whether to have used which light transmission path simply.

Like this, optical detector for communication 101 is provided with in

sleeve

6a, 6b to have the light that the light of having filled refractive index matched agent r detects with groove 38 and detects conjugant 7, and the end that utilizes this light to detect optical fiber 106c, the 106y of equipment side that conjugant 7 will insert and user side when using optical detector for communication 101 is docked connection each other.

Therefore, in optical detector for communication 101, also can detect conjugant 7 stress applications to light hardly even optical connector is extracted in insertion, it is very low that refractive index matched agent r detects the probability of peeling off with groove 38 from light.

In addition, optical detector for communication 101 can be used on simple method for making making light detection conjugants 7 such as the die sinking of explanation among Figure 10 (a)～Figure 10 (d), detect the groove width w that uses groove 38 as long as suitably set light, just the light leak amount repeatability of light leak can be controlled to desirable value well.

Have, optical detector for communication 101 is compared with existing optical detector for communication again, and amount of parts is few.

And, light detects conjugant 7 owing to can use general optical fiber as core 9 and cladding part 10, so core 9 or cladding part 10 have core or same structure, the material of covering with optical fiber, because have be inserted into optical detector for communication 101 in the identical size of external diameter of hoop 104c, 104y, therefore can make simply with low cost, the connection of optical fiber 106c, 106y and hoop 104c, 104y is also simple.

Therefore, according to optical detector for communication 101, we can say by using the light that on hoop, has formed groove to detect conjugant 7, thereby use the non-visible light that in light transmission path, transmits, not relying on fluorescent lifetime just can be with the having or not of the visual user mode of differentiating light transmission path at an easy rate, and can realize the high and cheap optical detector for communication of reliability.

In addition, since optical detector for communication 101 light detect conjugant 7 above, the PD element 13 that promptly is used to accept light leak and light detection be relative and be configured in optical detection part 12 is set between sleeve 6a, the 6b with groove 38, therefore compare with the situation that photo detector is housed in optical connector inside, with low cost, the structure of detecting device self is also simple.

Figure 12 (a) and Figure 13 represent the optical detector for communication 151a of the 4th embodiment of the present invention, as shown in these figures, also can be formed for the folding and unfolding groove 72 of the part of folding and unfolding PD14 in the periphery that light is examined conjugant 7, form in the bottom surface of this folding and unfolding groove 72 and observe the light that roughly is V word shape with the longitudinal profile and detect and use groove 78a.

In this optical detector for communication 151a, because being positioned at light, the light entrance port of PD14 detects with directly over the groove 78a, therefore can shorten from light leak generating unit (light of core 9 detects the both ends of the surface with groove 78a side) to the distance of PD element 13, can prevent that detection sensitivity from depending on the position of PD14 and reduce.

Have again, the groove shape that optical detector for communication 151a uses groove 78a owing to light detects and the cutting edge shape of die sinking are roughly the same, therefore light detects with the making of groove 78a simply, and light leak reflects upward by the inclined-plane that detects towards light with the core 9 of groove 78a, so light leak incides PD14 easily.

In addition, in optical detector for communication 151a, folding and unfolding groove 72 also has the positioning action that is used to carry PD14, and, if fill the refractive index matched agent r of sclerosis among the gap s7 between folding and unfolding groove 72 and PD14, then PD14 can be fixed in the folding and unfolding groove 72 more reliably.

Figure 12 (b) expression is as the variation of optical detector for communication 151a, and optical detector for communication 151b as shown in the figure also can form the light detection groove 78b that observes rectangular shaped with the longitudinal profile.

The optical detector for communication 201 of Figure 14 (a) and Figure 14 (b) expression the 5th embodiment of the present invention.This optical detector for communication 201 has used has the light detection conjugant 92 of light detection with groove 98, and this light detects and is formed obliquely in the mode that the inclined light shaft ground with core 9 intersects with groove 98.In the present embodiment, having formed light in the mode between the two sides that transversely cutting light obliquely detects conjugant 92 of observing from the lift-launch face of PD14 detects with groove 98.

This optical detector for communication 201 can prevent that Communication ray reflects to the light incident direction from the end face of this light incident side when Communication ray incides light and detects end face with the light incident side of groove 98.

Figure 15 represents the optical detector for communication 251 of the 6th embodiment of the present invention.As shown in the figure, this optical detector for communication 251 replaces above-mentioned PD14 and uses the PD111 that possesses two PD element 110a, 110b, constitutes optical detection part 109.PD element 110a is arranged on the interior sidewall surface 102a of equipment side of PD111, accepts from the light leak of the Communication ray (arrow of blacking Figure 15) of user side incident.On the other hand, PD element 110b is arranged on the interior sidewall surface 102b of user side of PD111, accepts the light leak of the Communication ray (Figure 15 hollow core arrow) of slave unit side incident.

In optical detector for communication 251,, thereby be easy to accept the main light leak that detects the axial expansion of conjugant 7 along light with PD111 by use PD111.

Therefore, according to optical detector for communication 251, detect the length direction of conjugant 7 at the light of optical detector for communication 251, the position of maximum detection sensitivity does not rely on the light incident direction, and reliability is higher.But also know the communication direction of light of now just communicating by letter.

Also have, in Figure 15, though PD element 110a, 110b are configured in respectively on interior sidewall surface 102a, the 102b of PD111, the detection sensitivity that hope suitably is configured in from the light leak of light detection conjugant 7 reaches on the position of maximum.

In addition, Figure 16 represents the optical detector for communication 301 of the 7th embodiment of the present invention.As shown in the figure, except the structure of the optical detector for communication 101 of Fig. 6, can also possess the fault detect portion 122 of informing that PD element 13 or light output part 28 have trouble-free optical element to use of being used to.As the fault detect portion 122 that optical element is used, can use the optical element fault detect LED that carries out ON/OFF by switch.

This occasion forms by the side of PD14, the back side and the sleeve of circuit board 27 in a side of the PD of shell 16 retractable room 23 and to divide the space S 12 that forms, be positioned at this space S 12 above the fault detect portion 122 that uses of the back side lift-launch optical element of circuit board 27.

In optical detector for communication 301, when the operator connects switch, then to use up to sleeve 6b outgoing fault detect from the fault detect portion 122 that optical element is used, this fault detect is used up by incided the PD element 13 of PD14 by sleeve 6b reflection (or scattering).

Do not have the occasion of fault at PD element 13 or light output part 28, the operator is by detecting by an unaided eye from the visible light of light output part 28 outgoing, thereby optical element does not have fault as can be known.In addition, at PD element 13 or light output part 28 occasion of fault has taken place, even the operator connects switch, can be from light output part 28 outgoing visible lights yet, thus fault has taken place in optical element as can be known.

In the above-described embodiment, though be illustrated, also can use a long sleeve with the example that has used two

sleeve

6a, 6b.

Below, with reference to Figure 17-Figure 25 the optical detector for communication and the variation thereof of the 8th embodiment of the present invention are described in detail.

Figure 17 is the longitudinal section of the major part of optical detector for communication 351 of the present invention.

As shown in figure 17, the optical detector for communication 351 of present embodiment has: be arranged on and connect light transmission path part and being used to each other and take out light unloading device 63 by the part of the Communication ray of transmission path; And the optical detection part 12 that is used to detect the part of the Communication ray that takes out by this light unloading device 63, be provided with fault detect mechanism on optical detection part 12, this fault detect mechanism has and is used to make fault detect light to the fault detect light illuminating part 59 of light unloading device 63 1 side outgoing (fault detect with light source 57, actuating mechanism 58) with accept light accepting part (light receiving component 54) by the fault detect light of light unloading device 63 lateral reflections.

In more detail, as shown in figure 17, possess: the conjugant 7 of optical fiber 2 with the light transmission path optically-coupled of transmitting non-visible Communication ray is equipped with in inside, with these conjugant 7 configured in parallel and accept light receiving component 54 by the part of the Communication ray that is loaded on optical fiber 2 transmission in the conjugant 7, and optical detection part 12; This optical detection part 12 has as the part of the Communication ray of the non-visible light of being accepted by light receiving component 54 light output component 555 with visible light output.

And, on optical detection part 12, be provided with fault detect light illuminating part 59, this fault detect light illuminating part 59 comprise be used to make fault detect light to the fault detect of direction (the light unloading device 63 sides) outgoing of conjugant 7 with light source 57, and make the actuating mechanism (switch) 58 of fault detect for outgoing fault detect light with light source 57 illuminatings.

The communication light wavelength is for example used suitable single or multiple wavelength in the frequency band range of the broad of wavelength 940nm～1500nm.Comprise the full range band of above-mentioned Communication ray by the optical wavelength frequency band that is subjected to that makes light receiving component 54, thereby with which kind of wavelength transmission can detect regardless of Communication ray.Light receiving component 54 can use PD (photodiode).

To this, as long as since can confirm light receiving component 54 be subjected to light action, thereby the fault detect light wavelength needn't comprise the frequency band of above-mentioned Communication ray entirely, can be narrow frequency band.Here, fault detect is in a ratio of short wavelength with the luminescent center wavelength of light source 57 and the centre wavelength that is subjected to the optical wavelength frequency band of light receiving component 54.Specifically, fault detect can be used the infrared LED of wavelength 940nm with light source 57.Light output component 555 can use the LED of appropriate color.

Also have, the light receiving component 54 of present embodiment is to accept simultaneously from fault detect with the fault detect light of light source 57 with from the shared light receiving component of the part of the Communication ray of light unloading device 63.

Optical detector for communication 351 is arranged on light transmission path set on the optical communication relevant device midway.Promptly, when using optical detector for communication 351, insert the hoop 60y that the optical connector of hoop 60c that the optical connector of equipment side possesses and user side possesses respectively and its butt joint be connected in the both ends of the surface of conjugant 7.Optical fiber 61c as the equipment side of light transmission path is housed in hoop 60c inside, the optical fiber 61y as the user side of light transmission path is housed in hoop 60y inside.

In addition, the both ends of conjugant 7 are inserted into

sleeve

62a, 62b respectively and are fixed.Sleeve 62a is used to carry out the optical axis contraposition of hoop 60c and conjugant 7, and sleeve 62b is used to carry out the optical axis contraposition of hoop 60y and conjugant 7.In a word, in conjugant 7, be configured to optical fiber 2 with as optical fiber 61c, the 61y of light transmission path on same straight line.

As optical fiber 2 or

optical fiber

61c, 61y, can use the single-mode fiber of quartz glass system or the multimode optical fiber of GI (graded index) type.The external diameter of optical fiber 2 is 40 μ m～125 μ m, preferred 40 μ m～80 μ m.

Below, conjugant is described.

Conjugant 7 is equipped with the hoop formation of docking the optical fiber 2 that is connected with the end (end of the connecting portion side of optical fiber) of

optical fiber

61c, 61y each other by inside.And, on conjugant 7, be provided with the light unloading device 63 that is used for taking out in the part of the Communication ray of optical fiber 2 transmission.This light unloading device 63 is made of the lower parts of the core of refractive index ratio optical fiber 2.

As light unloading device 63, for example enumerate length direction central authorities at the optical fiber 2 of conjugant 7, and in the position relative, form in cross-section mode, be used for the light that the part of Communication ray is taken out as light leak detected and use groove from outer surface to the optical fiber 2 of conjugant 7 with light receiving component 54.This light detects with groove and preferably is vertically formed the position relative with light receiving component 54 at conjugant 7 with the sensitive surface of light receiving component 54.Also have, light detects with groove and forms by job operations such as the die sinking for example undertaken by blade or etchings.

Though it can be vacuum that this light detects with its inside of groove, preferably filling has the resin of the lower refractive index of the core of refractive index ratio optical fiber 2.This resin both can use aqueous resin, also can use thermosetting or ultraviolet ray (UV) hardening resin, perhaps with the lower resin of refractive index of the core of the refractive index ratio optical fiber 2 after the adhesive hardens.In addition, it is lower with the core that the resin in the groove is more preferably refractive index ratio optical fiber 2 to be filled in the light detection, and has the lower refractive index of covering of refractive index ratio optical fiber 2.

In this enforcement side, on the conjugant 7 that constitutes by hoop, at the folding and unfolding groove 64 that is formed with folding and unfolding light receiving component 54 towards the position (central authorities of length direction) of light receiving component 54, formed light to optical fiber 2 in cross-section mode from the bottom surface of this folding and unfolding groove 64 and detected and use groove.Utilize this structure, can make the end face of the sensitive side of light receiving component 54 approach optical fiber 2 and improve the light detection sensitivity.

In addition, as conjugant 7, can use through at least a portion of Communication ray and make the hoop of the ceramic or the glass of its scattering after accepting Communication ray.In the present embodiment, as conjugant 7, the hoop that has used zirconia ceramics to constitute.

Figure 18 (a)～Figure 18 (c) is the longitudinal section of the employed conjugant of major part of optical detector for communication shown in Figure 17, and Figure 18 (d), Figure 18 (e) are the being seen vertical views of A direction from Figure 18 (a), Figure 18 (b).

Shown in Figure 18 (a), Figure 18 (b), detect as the light of light unloading device 63 and to use groove, being preferably made when observing from the longitudinal profile is rectangular shape (concavity) or V word shape.In addition, also can be shown in Figure 18 (d), will detect as the light of light unloading device 63 make with groove vertical with the optical axis direction of optical fiber 2, in addition, also can be shown in Figure 18 (e), light detects with groove and is formed obliquely in the mode that the optical axis direction with optical fiber 2 tilts to intersect.Form light detection groove across by such inclination, thereby can suppress because of the core of optical fiber 2 be filled in optical fiber and detect different reflections that produce of refractive index with the resin in the groove, and, can improve from the directive property of the light leak of Communication ray and improve the light detection sensitivity.

Below, optical detection part is described.

In Figure 17, optical detection part 12 possesses: be configured in the top of conjugant 7 abreast with conjugant 7, acceptance is by the light receiving component 54 of the part (light leak) of the Communication ray that is arranged on the light unloading device 63 on the conjugant 7 and spills from optical fiber 2, to accept the light output component 55 of light leak with light receiving component 54, and carry these light receiving components 54 and light output component 55 and constitute the circuit board 27 of optical detection circuit with visible light output.

This optical detection part 12 preferably has to be accepted to use up with the fault detect of light source 57 and from the light receiving component 54 of the part of the Communication ray of light unloading device 63 from fault detect simultaneously.Light receiving component 54 carries on the face below the circuit board 27 in the mode relative with light unloading device (light detect use groove) 63, and light output component 55 lift-launchs are on the face above the circuit board 27.Promptly, light receiving component 54 is installed on the one side of circuit board 27, and light output component 55 is installed on the opposite one side of circuit board 27.

Used the PD14 that possesses as the PD element 13 of light receiving component as light receiving component 54.In the present embodiment, PD14 with PD element 13 with detect as the light of light unloading device 63 with the relative mode in the top of groove by folding and unfolding in folding and unfolding groove 64.In addition, in the present embodiment, used the PD of cheap jar packaged type as PD14.

As shown in figure 17, light receiving component 54 had been located at state in the folding and unfolding groove 64 on the conjugant 7 by folding and unfolding under, the sensitive surface of PD element 13 detected over against the light as light unloading device 63 from the radially foreign side of optical fiber 2 and disposes with groove.On the other hand, light detects and is made into up to arriving at folding and unfolding groove 64 with groove.Thus, the light that is used as light unloading device 63 detects with groove and separates and the part of the Communication ray that leaks incides the sensitive surface of PD element 13 easily.

In addition, as the light output component in the present embodiment 55, bright lamp when preferably Communication ray transmits between

optical fiber

61c, 61y, turn off the light when transmitting, and the parts of the bright lamp of being accepted by light receiving component 54 with the fault detect light of light source 57 incidents from fault detect of occasion.

Below, fault detect mechanism is described.

Be provided with fault detect mechanism on optical detection part 12, this fault detect mechanism has and is used to make fault detect light to the fault detect illuminating part 59 of light unloading device 63 1 side outgoing (fault detect with light source 57, actuating mechanism 58) and the acceptance light accepting part (light receiving component 54) by the fault detect light of light unloading device lateral reflection.This fault detect illuminating part 59 have be used to make fault detect light to the fault detect of light unloading device 63 1 side outgoing with light source 57 with make the actuating mechanism (switch) 58 of this fault detect with light source 57 work, and be arranged on the circuit board 27 that constitutes optical detection circuit.

Fault detect is arranged side by side with light source 57 and light receiving component 54, and is arranged on the position with light unloading device (light detects and use groove) the 63 relative also length directions of stray fiber 2 in the mode towards the outer surface of conjugant 7.Because fault detect constitutes by pointing to the bigger LED in angle with light source 57, therefore when using light source 57 to conjugant 7 incidents, spread to the conjugant 7 that constitutes by hoop with bigger angle from fault detect.

Here, for optical detector for communication 351, the action when narration detects Communication ray simply.

The Communication ray that is made of non-visible light (for example passes through light transmission path,

optical fiber

61c, 61y among Figure 17) when transmitting, part by the Communication ray of light transmission path transmission spills by the light unloading device (light detects and use groove) 63 that is formed on the conjugant 7, and the part of the Communication ray that spills (light leak) is by light receiving component 54 acceptance.The light leak of being accepted by light receiving component 54 is converted into visible light, is exported by light output component 55 by circuit board 27.

On the other hand, when the state that is in not by light transmission path transport communication light, because transmission in the optical fiber conjugant 7 in 2 of Communication ray so the light leak of Communication ray is not accepted by light receiving component 54, can not exported visible lights by light output component 55.

When optical detector for communication 351 breaks down because of the bad grade of light receiving component 54, when light receiving component 54, light output component 55 or the circuit board 27 that promptly constitutes optical detection part 12 breaks down, even be in the state by light transmission path transport communication light, the part of Communication ray (light leak) can be as visible light by light output component 55 outputs yet.Therefore, the operator can not judge state that Communication ray is not transmitted, still be that fault has taken place optical detector for communication 351.

For this is judged, in the present embodiment, made by making fault detect light communicate photodetector 351 to conjugant 7 incidents in time self whether the structure of the affirmation of fault to have taken place as the major part of optical detector for communication 351.

Below, the action of the fault detect of optical detector for communication 351 of the present invention is described.

Figure 19 (a)～Figure 19 (c) is the major part about the optical detector for communication of Figure 17, the longitudinal section of the state when expression makes the work of fault detect mechanism.

Shown in Figure 19 (a), in order to investigate the fault of optical detector for communication 351 self, the operator is arranged on the optical detector for communication 351 in order to make, be used to make fault detect light in time to as the fault detect of conjugant 7 incidents of the major part of optical detector for communication 351 with light source 57 work push action mechanism (switch) 58.If push switch 58, then fault detect is worked with light source 57, i.e. fault detect is luminous with light source 57, to the light unloading device 63 side incident fault detect light of conjugant 7.

Secondly, shown in Figure 19 (b), fault detect is luminous and spread in the conjugant 7 that relatively wide-angle is being made of hoop to the fault detect light of the light unloading device 63 side incidents of conjugant 7 with light source 57, its part incides the bottom surface 68 of folding and unfolding groove 64, in the bottom surface 68 of this folding and unfolding groove 64, the part of fault detect light is to the direction reflection of light receiving component 54

And, shown in Figure 19 (c), by the fault detect light of bottom surface 68 reflection of folding and unfolding groove 64 with required angle to the sensitive surface incident that is arranged on the PD element 13 on the light receiving component 54 and be accepted.Lighted (output) at light output component 55 as visible light by circuit board 27 by the fault detect light that light receiving component 54 is accepted.

Under the state that carries out this action, by making the incident of fault detect light make the occasion of light output component 55 bright lamps (output), the operator can be judged as light receiving component 54 or luminous component 55 etc. by the visible light from light output component 55 outputs and not break down, and promptly optical detector for communication self does not break down.Thus, Communication ray does not transmit in light transmission path as can be known.

On the other hand, though incident fault detect light, the occasion of the not bright yet lamp of light output component 55 (output), the operator can be judged as light receiving component 54 or light output component 55 etc. fault has taken place, and promptly fault has taken place in optical detector for communication self.

Also have, in Figure 19, represented that fault detect is luminous and directly advanced and by bottom surface 68 reflections of folding and unfolding groove 64 to conjugant 7 by the fault detect light of incident with light source 57, directly advance and incide the state of light receiving component 54, but actual fault detect light is except directly advancing as mentioned above and reach the light receiving component 54, also through scattering or multiple path such as reflection and arrive light receiving component 54 repeatedly.

As mentioned above, optical detector for communication of the present invention 351 since possess send fault detect light fault detect with light source 57 be used to actuating mechanism (switch) 58 that this fault detect is worked with light source 57, so, just can judge simply that optical detector for communication self has non-fault by operating switch 58.Thus, when optical detector for communication 351 self fault had taken place, the operator can not prevent to extract the unfavorable condition of optical connector etc. to just thinking it is the state that does not have transport communication light by mistake at the light transmission path of transport communication light.

As fault detect light source 57, for example LED can use the employed LED of various telechiric devices, wherein has the LED of light-emitting zone at the short wavelength side of infrared light region, draws cheap and suitable.

Secondly, other embodiments of the present invention are described.

In the present invention, also the conjugant of explanation in Figure 17, Figure 18 (a), Figure 18 (b) can be made the conjugant of the hoop gap mode shown in Figure 18 (c).Promptly, the conjugant 7a of

optical fiber

2a, 2b is equipped with in inside, the gap 213 that 7b is spaced from each other specified length disposes.In this structure, be used for taking out light unloading device in the part of the Communication ray of optical fiber 2 transmission and be the gap 213 between conjugant 7a, the 4b, the refractive index of the core of refractive index ratio optical fiber 2a, the 2b in this gap 213 is low.The inside in this gap 213 can be vacuum, but preferably is filled with the resin of the low refractive index of core with refractive index ratio optical fiber 2a, 2b.This resin both can use aqueous resin, also can use thermosetting or ultraviolet ray (UV) hardening resin or with the lower resin of refractive index of the core of refractive index ratio

optical fiber

2a, 2b after the adhesive hardens.In addition,

conjugant

7a, 7b preferably are provided with and are used to carry out stationary sleeve 6, so that it is distolateral to cover one in the lump.

Figure 20 is the longitudinal section of major part of the optical detector for communication of variation of the present invention.

Optical detector for communication 352 shown in Figure 20 is to append the structure that forms grooving portion 70 on the optical detector for communication 351 of Figure 17.Promptly, on the position of fault detect with light source 57 of conjugant 7, be formed with grooving portion 70.

Section was a quadrilateral when side-looking was made by grooving portion 70.Here, grooving portion 70 is directly in abutting connection with folding and unfolding groove 64, and the non-boundary ground, space of grooving portion 70 and folding and unfolding groove 64 continuously.Since the bottom surface (face that is parallel to optical fiber 2 at Figure 20 middle finger) the 68th of grooving portion 70, the boundary surface of conjugant 7 and air, thereby become easy reflected light, and will reflex to the reflecting surface of light receiving component 54 from fault detect with the fault detect light of light source 57.

In addition, the optical detector for communication 352 of Figure 20 has grooving portion 70 on the position of fault detect with light source 57, so luminous and incide in the space of fault detect light in grooving portion 70 of conjugant 7 and transmit with light source 57 by fault detect, its part incides on the bottom surface 68 of grooving portion 70 with required angle.Because reflected by bottom surface 68 when transmitting in the space of fault detect light in grooving portion 70, thereby compare with the optical detector for communication of Figure 17, the light quantity that incides the fault detect light in the light receiving component 54 is more.If what make light receiving component 54 is subjected to the light light quantity for certain, then can make the light quantity minimizing of the fault detect light that sends with light source 57 by fault detect.Thus, owing to can reduce the fault detect light that bleeds to optical fiber 2, thereby can prevent that luminous power in the light transmission path is because of the fault detect light change of bleeding and become the communication barrier.

Figure 21 is the longitudinal section of major part of the optical detector for communication of variation of the present invention.

Optical detector for communication 353 shown in Figure 21 is in the optical detector for communication of Figure 17, has used the conjugant 107 that does not form folding and unfolding groove 64 to replace conjugant 7.In this variation, detect with groove as the light of light unloading device 103 and to cross over from optical fiber 2 to conjugant 107 outside surface and form.In addition, the ground connection configuration mutually of the outside surface of light receiving component 54 and conjugant 107, the sensitive surface of PD element 13 is just relative with groove with the light detection as light unloading device 103.Also have, on this optical detector for communication 353, also can similarly form grooving portion 120 with Figure 20.

Figure 22 is the longitudinal section of major part of the optical detector for communication of variation of the present invention.

Optical detector for communication 354 shown in Figure 22 is in the optical detector for communication of Figure 17, has used the conjugant of the hoop gap mode of explanation in Figure 18 (c) to replace conjugant 7.The ground connection configuration mutually of this occasion, the outside surface of light receiving component 54 and sleeve 6, and the mode that faces with the sensitive surface of PD element 13 and gap 213 as the light unloading device disposes.In addition, on this optical detector for communication 354, also can similarly form grooving portion 120 with Figure 20.

Figure 23 is the longitudinal section of major part of the optical detector for communication of variation of the present invention.

Optical detector for communication 355 shown in Figure 23 is in the optical detector for communication 352 of Figure 20, with the bottom surface 68 of fault detect relative position with light source 57 on be provided with reflection part 71.Reflection part 71 is by being provided with golden film or the multilayer film optical filter forms from folding and unfolding groove 64 until the bottom surface 68 of grooving portion 70.

By this reflection part 71 is set, owing to can make lead the efficiently direction of light receiving component 54 of the fault detect light that sends with light source 57 from fault detect, and can prevent to enter into the optical fiber 2 that is arranged in the conjugant 7 by the fault detect light that fault detect is sent with light source 57, therefore can prevent that the luminous power in the light transmission path from hindering entering of light of detection for some reason and changing the generation communication barrier.

Figure 24 is the longitudinal section of major part of the optical detector for communication of variation of the present invention.

Optical detector for communication 356 shown in Figure 24 is in the optical detector for communication 352 of Figure 20, is provided with reflection part 71 at the outside surface with the opposite side of a side (upper face side) that is provided with circuit board 27 (below side) of conjugant 7.The reflection part 71 of Figure 24 is same with Figure 23, can make lead the efficiently direction of light receiving component 54 of the fault detect light that sends with light source 57 from fault detect.

Figure 25 is the vertical profile stereographic map of optical detector for communication shown in Figure 20.

Optical detector for communication 357 shown in Figure 25 is to be provided with the external packing 222 that is used to protect major part around the major part of optical detector for communication shown in Figure 20 352.Non-boundary ground forms grooving portion 70 and folding and unfolding groove 64 on conjugant 7, and light receiving component 54 is towards the bottom surface configuration of folding and unfolding groove 64, and fault detect is disposed towards grooving portion 70 with light source 57.

Below, describe according to the optical connector of Figure 26～35 pair first embodiment of the present invention.

Optical connector of the present invention is arranged on the optical communication relevant device of for example data center or telecommunication bureau etc. and uses, to dock the part that the connecting portion of the optical fiber of connection takes out Communication ray each other as the end of the optical fiber of light transmission path, according to having or not of Communication ray and the parts of user mode (whether carrying out optical communication) that can the light travels path.

Figure 26 (a) is the longitudinal section of major part of the optical connector of expression first embodiment of the present invention, and Figure 26 (b) and Figure 26 (c) are its A portion enlarged drawings.

Shown in Figure 26 (a), optical connector 1A possesses: have and the core 9 of light transmission path optically-coupled and the conjugant 7 of cladding part 10, dispose and be received in the light receiving component 54 of the part of the Communication ray that transmits in the core 9 of conjugant 7 abreast with conjugant 7, and optical detection part 12; This optical detection part 12 has the light that will be accepted by light receiving component 54 light output component 55 with visible light output.

The both ends of conjugant 7 are inserted into

sleeve

6a, 6b respectively and are fixed.When using optical connector 1A, insert the hoop 60y that the optical connector of hoop 60c that the optical connector of equipment side possesses and user side possesses respectively and its butt joint is connected in the both ends of the surface of conjugant 7.Optical fiber 61c as the equipment side of light transmission path is housed in hoop 60c inside, the optical fiber 61y as the user side of light transmission path is housed in hoop 60y inside.Sleeve 6a is used to carry out the optical axis contraposition of hoop 60c and conjugant 7, and sleeve 6b is used to carry out the optical axis contraposition of hoop 60y and conjugant 7.In a word, in conjugant 7, be configured to core 9 and cladding part 10 with as optical fiber 61c, the 61y of light transmission path on same straight line.

Conjugant 7 is made of hoop 50, and this hoop 50 possesses the cladding part 10 that docks the core 9 that is connected each other with the end (end of the connecting portion side of optical fiber) of the core of

optical fiber

61c, 61y and surround this core 9 and be made of refractive index ratio core 9 low materials.Core 9 usefulness have been with the core identical materials of each

optical fiber

61c, 61y, for example added the material of germanium etc. in quartz glass, cladding part 10 usefulness and the covering identical materials of each

optical fiber

61c, 61y, the material that constitutes of pure quartz glass for example.Core 9 and cladding part 10 both can use optical waveguide, also can use optical fiber.In the present embodiment, as conjugant 7, used the inner hoop 50 that optical fiber 2 is housed.

As optical fiber 2 or

optical fiber

61c, 61y, can use the single-mode fiber of quartz glass system or the multimode optical fiber of GI (graded index) type.The equal diameters of the core of the diameter of the core of optical fiber 2 and

optical fiber

61c, 61y (for example 10 μ m), the cladding diameter of optical fiber 2 is 40～125 μ m, preferred 40 μ m～80 μ m.

In addition, as hoop 50, can use through at least a portion of Communication ray and make the hoop of the ceramic or the glass of its scattering after accepting Communication ray.In the present embodiment, as hoop 50, the hoop that has used zirconia ceramics to constitute.

Connect conjugant 7 light transmission path both ends of the surface for be inserted into optical connector 1A in the end face (end face of the connecting portion side of optical fiber) of each

hoop

60c, 60y realize that PC (physics contact) is connected and is ground into the PC end face.The external diameter of conjugant 7 is identical with the external diameter of each

hoop

60c, 60y.

Also have, hoop 60c is installed in the optical connector adapter (not shown) of equipment side, and hoop 60y is installed in the optical connector adapter (not shown) of user side.These

hoops

60c, 60y make of pottery or metal, and its end face (end face of the connecting portion side of optical fiber) is ground into the end face of PC (physics contact).

Conjugant 7 possesses the light unloading device that is used for taking out in the part of the Communication ray of core 9 transmission.This light unloading device is made by refractive index ratio core 9 low materials.As the light unloading device, on the position relative of conjugant 7 such shown in for example Figure 26 (b), Figure 26 (c) with light receiving component 54, at least penetrate into the mode of core 9 (core of optical fiber 2) with the surface from conjugant 7, the light that is formed for the part of Communication ray is taken out as light leak detects with groove 48.Light detects with the groove 48 and the sensitive surface of light receiving component 54 and is vertically formed on the conjugant 7 of the position relative with light receiving component 54, is essentially rectangular shape (concavity) when making the longitudinal profile observation.Light detects with groove 48 and forms by groove processing methods such as the die sinking for example carried out with blade or etchings.

In the present embodiment, on the hoop 50 of conjugant 7, be formed with the folding and unfolding groove 64 that is used for folding and unfolding light receiving component 54, and on this folding and unfolding groove 64, formed light detection groove 48.This is in order to make light receiving component 54 approach optical fiber 2 (making light receiving component 54 approach light leak generating unit (light of core 9 detects the both ends of the surface with groove 48 sides)) to improve detection sensitivity.

Light detects the resin r that preferably has the low refractive index of refractive index ratio core 9 with groove 48 in the inside filling.In addition, the light detection also can be a vacuum with the inside of groove 48.Detect with the resin r in the groove 48 as being filled in light, both can use aqueous resin, also can use thermosetting or ultraviolet ray (UV) hardening resin or with the lower resin of refractive index of the refractive index ratio core 9 after the adhesive hardens.In addition, be filled in light and detect that more preferably refractive index ratio core 9 is low with the resin r in the groove 48, and have the low refractive index of refractive index ratio cladding part 10.

Figure 27 (a) is the longitudinal section of the conjugant 7 of the optical connector 1A shown in Figure 26 (a), and Figure 27 (a) and Figure 27 (c) are the being seen vertical views of B direction from Figure 27 (a).

Shown in Figure 27 (b), light detects with groove 48 and preferably is formed obliquely in the mode that the inclined light shaft with the core 9 of conjugant 7 intersects.This is to produce reflection in order to suppress because of the different of refractive index of core 9 and resin r, and improves the directive property of light leak and improve the light detection sensitivity of passing through PD14.

Shown in Figure 27 (c), though being detected with the optical axis of groove 48 with core 9, light is vertically formed, in the present embodiment, and as resin r, because what use is the low resin of refractive index ratio core 9, so might produce reflection because of the refractive index of core 9 and resin r different.Thereby, shown in Fig. 2 (b), wish that light detects with the inclined light shaft ground formation of groove 48 with the core 9 of conjugant 7.

In Figure 26 (a), optical detection part 12 possesses: be arranged on the top of conjugant 7 abreast with conjugant 7, accept by being arranged on that light on the conjugant 7 is got mechanism and the light receiving component 54 of the part (light leak) of the Communication ray that spills from core 9; The light leak that light receiving component 54 is accepted is with the light output component 55 of visible light output; And, carry light receiving component 54 and light output component 55 and the circuit board 27 of formation optical detection circuit.Light receiving component 54 carries on the face below the circuit board 27 in the mode relative with light unloading device (light detects with groove 48), and light output component 55 carries on the face above the circuit board 27.

As light receiving component 54, used the PD14 that possesses as the PD element 13 of photo detector.PD14 with PD element 13 and light detect with the relative mode in the top of groove 48 by folding and unfolding in folding and unfolding groove 64.In the present embodiment, used the PD of cheap jar packaged type as PD14.

As light output component 55, the differentiation of bright lamp, light-off when not transmitting has or not communication LED (light emitting diode) when having used Communication ray to transmit between

optical fiber

61c, 61y.

Use Figure 28 that optical connector 1A is described in further detail.

As shown in figure 28, optical connector 1A possess in Figure 26 (a) explanation its major part of folding and unfolding square tubular shell 16 and be arranged on the middle body on this shell 16 and cover the cover 17 of the case shape of optical detection part 12.

Shell 16 one ends (left side among Figure 28) are the optical connector adapter 18c of equipment side, and the other end (right side among Figure 28) is the optical connector adapter 18y of user side.In the optical connector adapter 18c of equipment side, be provided with and be used for inserting in advance the optical connector latch of equipment side and be fixedly coupled device locking plate (SC annex) 19c.Equally, in the optical connector adapter 18y of user side, be provided with and be used for fixing connector locking plate (SC annex) 19y that inserts the optical connector latch extract the user side that is provided with freely.

Middle body in shell 16 is formed with main body retractable room 22, these main body retractable room 22 folding and unfoldings have two

sleeve

6a, 6b and remain on a conjugant 7 of the inboard between these

sleeves

6a, 6b, and

sleeve

6a, 6b and conjugant 7 quilt folding and unfoldings in advance are in this main body retractable room 22.The top of the main body retractable room 22 in shell 16 is formed with the PD retractable room 23 of folding and unfolding PD14.

Folding and unfolding has circuit board 27 in cover 17.Cover 17 usefulness are made for the wide material transparent that causes of light output component 55 outgoing.

Here, for the low reason of refractive index that detects with the refractive index ratio core 9 of groove 48 inside as the light of light unloading device is described.

Shown in Figure 26 (b) and Figure 26 (c), the Communication ray that transmits in the core 9 of conjugant 7 detects with the boundary surface of groove 48 and core 9 at light to be expanded, and the part of Communication ray is leaked and the generation light leak.Detect zirconic hoop 50 scatterings that contained after the light leak that produces with groove 48 sees through cladding part 10 as scatterer at light, the light leak after this scattering is accepted by PD14.Light leak converts electric signal to by PD14, and this electric signal is exported with visible light by the light output component 55 of optical detection part 12 by circuit board 27.

Since the direct of travel of Communication ray be the slave unit side to user side, from user side to equipment side this two side, which, wish to dispose PD14 with the detection light leak in the mode of configuration PD element 13 on detecting with the center of groove 48 at light for the light leak that can accept no matter to come from direction.

Yet, if fill the refractive index resin different in the gap between optical fiber with core, then can cause Communication ray when the end face of the light incident side that incides light detection usefulness groove 48, Communication ray reflects to the incident direction of light because of the different light incident side end faces from core of core with the refractive index of resin.Therefore, generally, be filled in resin in this gap and use the resin have with the equal refractive index of core, refractive index is criticized and the loss (light loss) that suppresses to cause because of reflection.

But, if in optical connector 1A, use the resin have with the equal refractive index of core 9, then as Figure 26 (b) and Figure 26 (c) in shown in the dotted arrow, almost disappear in the expansion of light detection with the light leak in the groove 48.Thereby the light leak of being used groove 48 leakages by the light detection is when the border of the inner face of surface that arrives optical fiber 2 and hoop 50, and the center of using groove 48 is detected away from light in its position, and the light of leakage is by hoop 50 scatterings of using the position of groove 48 away from the light detection.Therefore, detect center with groove 48 if PD14 is configured in light, then existing can not be with the peak value of the light of PD14 detection of leaks, can not accept the situation of the light that leaks with PD14 efficiently.

Thereby for the light of accepting efficiently with PD14 to leak, the essential increasing in the expansion (increasing extended corner) of light detection with the light of groove 48 leakages makes leak light arrive hoop 50 in the center of detecting near light with groove 48 as far as possible.

So, in the optical connector 1A of present embodiment, will detect inside with groove 48 as the light of light unloading device and be set as the refractive index lower than core 9.For example, the resin r that filling has the refractive index lower than core 9 in light detects with groove 48.Therefore, shown in solid arrow among Figure 26 (b) and Figure 26 (c), light detects with expansion significantly in the groove 48 at light, leak light is in the position of more leaning on the center than light unloading device (in the position of detecting near light with the center of groove 48) scattering, therefore, improved the sensitivity (light detection sensitivity) of accepting leak light with PD14.

If use member as the light unloading device with refractive index lower than core 9, though produce the different reflection problems that cause because of the refractive index of core 9 and light unloading device, but in the present embodiment, form owing to will detect as the light of light unloading device, therefore can suppress the different reflections that cause of the core 9 and the refractive index of light unloading device (light detects with groove 48) with the inclined light shaft ground of groove 48 with core 9.

In addition, as mentioned above, detect with the light leak of groove 48 leakages by light and to incide the position scattering of hoop 50 at cladding part 10 from optical fiber 2, thus for make light leak more near the position scattering of PD14, wish that the cladding diameter of optical fiber 2 is as much as possible little.The general known optical fiber that cladding diameter 125 μ m are arranged also has the optical fiber of cladding diameter 80 μ m for example or cladding diameter 40 μ m in addition, therefore, as optical fiber 2, wishes that using such cladding diameter is the optical fiber of 40～125 μ m, preferred 40～80 μ m.Because the light leak of the little optical fiber of cladding diameter can arrive scattering medium (hoop 50 that is made of zirconia) quickly, therefore can be more by detecting (acceptance) light leak near the center.

Figure 29 is that the light of expression when making light detect variations in refractive index with groove 48 detects with the groove width w of groove 48 and the graph of a relation of light leak incidence.

In Figure 29, " the light leak incidence " of the longitudinal axis is that the Communication ray that will transmit in the optical fiber of conveyor side is made as at 100% o'clock in the amount (ratio) of light detection with the light leak that takes place in the groove 48.Figure 29 represent as optical fiber 2 used refractive index be 1.46 core (core 9) around have the optical fiber of the covering (cladding part 10, refractive index 1.458) that constitutes by pure quartz glass, and light detected to make the occasion (refractive index is 1.00) of vacuum and make the refraction index changing of resin r with groove 48 be 1.36,1.45 o'clock measurement result.

As shown in figure 29, the groove width w that detects with groove 48 along with light becomes greatly gradually, detected by light and with groove 48 the light leak amounts take place and increase, but groove width w is when identical, and light detects with the refractive index of the inside of groove 48 low more, and then the light leak incidence is got over increase.That is to say that if groove width w is necessarily, then the light detection is low more with the refractive index of the inside of groove 48, then big more with the expansion of the light leak of groove 48 by the light detection, by the light detection sensitivity raising of PD14 acceptance.

Therefore, low and approach 1 even groove width w is constant big by making light detect refractive index ratio core 9 with the inside of groove 48, then can carry out the detection of light leak efficiently with PD14.In addition, by making the refractive index lower, expand significantly and can reduce groove width w, for example when potting resin r, can also reduce the amount of the resin r of use because light leak detects with groove 48 at light than core 9.

Light detects with the groove width w of groove 48 as long as suitably set desirable light leak incidence for.But, if the light leak incidence is excessive,, wish that therefore consideration groove width w is set below 100 μ m the influence of Communication ray then because loss increases the influence that causes Communication ray, be below 20% so that make the light leak incidence.For example, using the resin r of refractive index 1.36 and making the light leak incidence is 20% occasion, and groove width w is that about 70 μ m get final product.

Also have, take place, and in the direction expansion of this end face to PD14, therefore, (when not having light to detect with groove 48) do not see through during groove width w=0 μ m with having leakage because light leak detects the end face of using groove 48 incidents at Communication ray to light.

To be the light detection efficiency of expression when making light detect variations in refractive index with groove 48 detect graph of a relation with the distance of the center of groove 48 to distance light to Figure 30.In Figure 30, " distance " of transverse axis be will configuration PD14 position (light detects the center with groove 48) be made as 0 (zero) point occasion, along the distance of the length direction of hoop 50, " the light detection efficiency " of the longitudinal axis is the light detection efficiency of the detection limit of the light leak that will be taken place with peak profileization.

Figure 30 for used as optical fiber 2 refractive index be 1.46 core (core 9) around have the optical fiber of the covering (cladding part 10, refractive index 1.458) that constitutes by pure quartz glass, and with light detect with groove 48 make the occasion (refractive index 1.00) of vacuum and make the refraction index changing of resin r be 1.40,1.45 occasion, the slave unit side is to user side (A), the direct of travel of (B) these both sides' Communication ray is measured from user side to equipment side.Also have, the groove width w that light detects with groove 48 is fixed as 60 μ m.

As shown in figure 30, the light detection efficiency does not reach maximum in the position (0 point) of configuration PD14, but reaches maximum in the position probing amount of leaving PD14 a little.If the refractive index (refractive index of resin r) that light is detected with groove 48 changes, then refractive index is low more, light output efficiency in the position (0 point) that disposes PD14 increases more, that is to say, refractive index is low more, expand more greatly with the light leak of the end face generation of groove 48 to the direction of PD14 in the light detection, by the light detection limit increase more of PD14.

Therefore, make the light detection low with the refractive index of the refractive index ratio core 9 of groove 48, light detects with the refractive index of groove 48 low more, just can detect light leak efficiently with PD14.

Also have, in order to strengthen the expansion that detects the Communication ray of using groove 48 at light, though can be in light detects with groove 48 potting resin and use it and be in (or vacuum) under the air state not, but this occasion, because existing dust etc. to enter light detects with the possibility in the groove 48, thereby must detect with groove 48 by sealing light, manufacturing cost increases.Thereby, wish in light detects with groove 48, to fill resin r with alap refractive index.

As discussed above, the optical connector 1A of present embodiment forms the conduct light unloading device with refractive index lower than core 9 on conjugant 7 light detects with groove 48, thus the part that can take out the Communication ray of transmission in core 9.

Detect with groove 48 by filling light with for example low resin r than the refractive index of the core 9 of conjugant 7, detect the Communication ray that transmits with in the core 9 of groove 48 at light, it is big that the expansion of the light leak that it spills becomes, because the position of light leak scattering is approached light more and is detected the center of using groove 48, therefore the light to light receiving component 54 diffusions becomes many, can increase the amount of the light that can use light receiving component 54 acceptance.Thereby the optical connector 1A of present embodiment has the simple structure of the assembling operation of the complexity that need not to carry out high precision contraposition etc., can improve the light detection sensitivity by the light leak of light receiving component 54.That is, can take out the part of the Communication ray that in light transmission path, transmits efficiently.

Have, by using the resin r of low-refraction, light leak detects with groove 48 at light expand significantly again, therefore compares with the occasion of the resin of the equal refractive index of use and core 9, can reduce light and detect the groove width w that uses groove 48, can reduce the amount of the resin r of use.Thereby can suppress cost.

In addition, in the present embodiment, used conjugant 7 with light detection usefulness groove 48 as the light unloading device, and the end of optical fiber 61c, the 61y of equipment side that inserts when using optical connector 1A and user side docks connection each other, therefore, even insert extract optical connector also hardly can be to conjugant 7 stress applications, have again, detect the groove width w that uses groove 48 as long as suitably set light, just the amount repeatability of light leak can be controlled to desirable value well, the reliability height.Promptly, can take out the part of Communication ray for a long time efficiently.

Have, optical connector 1A compares with existing optical connector again, and amount of parts is few, can make conjugant 7 with simple manufacturing method such as die sinkings, therefore can suppress cost.

In addition, in the present embodiment, the mode of intersecting with the inclined light shaft with the core 9 of conjugant 7 is formed obliquely light and detects with groove 48, therefore, can suppress to detect reflection with the different generations of the refractive index of groove 48 because of core 9 and light, and, make the directive property of light leak better, can improve light detection sensitivity by the light leak of light receiving component 54.

In the present embodiment, used the parts that see through light leak and make its scattering, therefore, can make light leak, can further improve light detection sensitivity by the light leak of light receiving component 54 in the position scattering that has reached hoop 50 from optical fiber 2 as hoop 50.Have again, be reduced to 40～125 μ m, thereby the position that can make light leak arrive hoop 50 is approached light receiving component 54 more, can further improve the light detection sensitivity by the cladding diameter that makes optical fiber 2.

In the above-described embodiment, though used on hoop 50 conjugant 7 that forms folding and unfolding groove 64, folding and unfolding PD14 in this folding and unfolding groove 64, optical connector 1A1 that also can be as shown in figure 31, use and do not form the conjugant 92 of folding and unfolding groove 64, and above hoop 50, dispose PD14.

In addition, in the above-described embodiment, used on hoop 50, to form the light detection conjugant 7 of groove 48 that vertical profile is considered as the essentially rectangular shape, but be not limited thereto, also can be shown in figure 32, use has formed vertical profile and has been considered as the conjugant 82 that groove 78a is used in the roughly light detection of V word shape.

Have again, in the above-described embodiment, though used and adopted a hoop 50 and this hoop 50 is processed and formed light and detect conjugant 7 with groove 48, but also can be shown in Figure 33 (a), use the hoop 5a, the 5b that have adorned

optical fiber

2a, 2b in adopting two, dispose two

hoop

5a, 5b by sleeve 6 with predetermined distance and form light detection groove 84, and detect the conjugant 7 of using potting resin r in the groove 84 at this light.

Using the occasion of this conjugant 7, the optical connector 1A2 shown in Figure 33 (b), as long as with sleeve 6 above light detect configuration PD14 on the position relative with groove 84.

Other embodiments of the present invention are described.

Figure 34, optical connector 1B shown in Figure 35 are the optical connectors that the optical detection part among the optical connector 1A of Figure 26, Figure 28 12 is made separately in addition.That is to say, separate forming the photodetector 401 that possesses optical detection part 12 with optical connector 1A, when the detection that communicates light, again photodetector 401 is installed on the optical connector 1A.In Figure 34, Figure 35, for same parts mark and Figure 26,28 identical labels and omit its explanation.

Optical connector 1B possesses the ferrule holder 103 that is used for support engages body 7, by sidewall with these ferrule holder 203 support folding and unfolding grooves 64, thus the contraposition of realization conjugant 7.On ferrule holder 203, be formed with the PD retractable room 23 that is used for folding and unfolding PD14.

In addition, in the side of the shell 16 of optical connector 1B, be formed with the positioned detection device orientation direction groove 204 that is used to guide the shank 205 on the bottom surface that is formed at photodetector 401 when photodetector 401 is installed and carries out photodetector 401.In addition, on the shell above the PD retractable room 23 16, be formed with the PD patchhole 210 that is used to insert PD14.

On the other hand, photodetector 401 possesses the basket 206 of folding and unfolding circuit board 27, to be provided with PD14 from the outstanding mode in the bottom surface of basket 206.In addition, on the bottom surface of basket 206, be formed with a plurality of (being four in Figure 34, Figure 35) shank 205 that is inserted in the detecting device orientation direction groove 204.On basket 206, be provided with light output component 55 as the communications status alarm lamp.

Folding and unfolding is useful on the battery 207 to PD14 or light output component 55 supply powers in the basket 206 of photodetector 401.On basket 206,, can dismantle the top part of basket 206 and form cap 208 in order to change battery 207.In addition, on basket 206, be provided with and be used to switch the power switch 209 that has or not from the supply of the power supply of battery 207.In Figure 34,, it also can be one though represented to be provided with the situation of two light output components 55.In addition, also a power lights as display power supply ON/OFF in two light output components can be used.

When communicating the detection of light, the shank 205 of the photodetector 401 detecting device orientation direction groove 204 along optical connector 1B is inserted with optical connector 1B.So the PD14 outstanding from the bottom surface of the basket 206 of photodetector 401 be by PD patchhole 210, with the state folding and unfolding of location in PD retractable room 23.Under this state,, just can communicate the detection of light by energized switch 209.

In optical connector 1B since with optical detection part 12 as another body, therefore can make photodetector 401 miniaturizations.In addition, owing to can further reduce amount of parts, therefore can realize optical connector 1B cheaply.

In optical connector 1B, under the state that photodetector 401 is not installed, PD patchhole 210 is in unlimited state.Thereby, enter PD retractable room 23 in order to prevent dust etc., cap assembly also can be set, so that cover PD patchhole 210.

The present invention is not limited to above-mentioned embodiment, for industry personnel, and the mode that illustrated whole changes of instructing scope substantially and being comprised and alternative structure have been specialized in this instructions that should be interpreted as expecting.

Claims

1. optical detector for communication, the end that connects the light transmission path that is made of optical fiber by sleeve and detect the Communication ray that has or not light transmission path at this connecting portion each other, it is characterized in that,

Possess light and detect conjugant and optical detection part; This light detects conjugant and is arranged on above-mentioned connecting portion in the above-mentioned sleeve, is engaged with each other with the end of above-mentioned light transmission path, and has the core of the external diameter different with the core of above-mentioned light transmission path; This optical detection part is arranged on the top that above-mentioned light detects conjugant, detects the light leak that detects the Communication ray of conjugant leakage by above-mentioned light.

2. optical detector for communication according to claim 1 is characterized in that,

Above-mentioned light detects conjugant, and its axial length equates with distance from the core of above-mentioned light transmission path to the sensitive surface of the above-mentioned optical detection part of accepting above-mentioned light leak.

3. optical detector for communication according to claim 1 and 2 is characterized in that,

Above-mentioned light detect conjugant also possess be arranged on above-mentioned core around and the cladding part of the external diameter identical with the covering of above-mentioned light transmission path.

4. according to each described optical detector for communication of claim 1～3, it is characterized in that,

Above-mentioned light detects conjugant and possesses hoop.

5. according to each described optical detector for communication of claim 1～4, it is characterized in that,

Above-mentioned optical detection part possesses the photo detector of accepting above-mentioned light leak and will convert the light output part of visible light with the above-mentioned light leak that above-mentioned photo detector is accepted to.

6. according to each described optical detector for communication of claim 1～5, it is characterized in that,

Above-mentioned optical detection part also possesses informs that it has trouble-free fault detect portion.

7. according to each described optical detector for communication of claim 1～6, it is characterized in that,

Above-mentioned sleeve is made of the pottery of the part of the light leak that sees through the Communication ray that leaks by above-mentioned light detection conjugant.

8. optical detector for communication, the end that connects the light transmission path that is made of optical fiber by sleeve and detect the Communication ray that has or not light transmission path at this connecting portion each other, it is characterized in that,

Possess light and detect conjugant and optical detection part; This light detects conjugant and is arranged on above-mentioned connecting portion in the above-mentioned sleeve, be engaged with each other with the end of above-mentioned light transmission path, and the light with the core that connects above-mentioned light transmission path detects with groove and is filled in this light and detects with the refractive index matched agent in the groove; This optical detection part is arranged on the top that above-mentioned light detects conjugant, detects the light leak that detects the Communication ray that leaks with groove by above-mentioned light; It is 50～150 μ m along the groove width that above-mentioned light detects the length direction of conjugant that above-mentioned light detects with groove.

9. optical detector for communication according to claim 8 is characterized in that,

The periphery that detects conjugant at above-mentioned light is formed with the folding and unfolding groove of the above-mentioned optical detection part of folding and unfolding, is formed with above-mentioned light and detects and use groove in this folding and unfolding groove.

10. according to Claim 8 or 9 described optical detector for communication, it is characterized in that,

Above-mentioned light detects and is formed obliquely in the mode that the inclined light shaft with above-mentioned light transmission path intersects with groove.

11. each described optical detector for communication is characterized in that according to Claim 8～10,

Above-mentioned optical detection part possesses the photo detector of accepting light leak and will convert the light output part of visible light with the light leak that above-mentioned photo detector is accepted to.

12. each described optical detector for communication is characterized in that according to Claim 8～11,

Above-mentioned sleeve constitutes by seeing through by the pottery of above-mentioned light detection with the part of the light leak of the Communication ray of groove leakage.

13. each described optical detector for communication is characterized in that according to Claim 8～12,

14. an optical detector for communication possesses: be arranged on and connect on the light transmission path part each other, be used to take out light unloading device by the part of the Communication ray of above-mentioned light transmission path transmission; And the optical detection part that is used to detect the part of the above-mentioned Communication ray that takes out by above-mentioned smooth unloading device; It is characterized in that,

Be provided with fault detect mechanism at above-mentioned optical detection part, this fault detect mechanism has: be used to make the fault detect light illuminating part of fault detect light to the outgoing of above-mentioned smooth unloading device side; And acceptance is by the light accepting part of the above-mentioned fault detect light of above-mentioned smooth unloading device lateral reflection.

15. optical detector for communication according to claim 14 is characterized in that,

Above-mentioned fault detect light illuminating part has: make the failure light emission test light source of above-mentioned fault detect light to the outgoing of above-mentioned smooth unloading device side; And the actuating mechanism that makes above-mentioned fault detect usefulness light source works.

16. according to claim 14 or 15 described optical detector for communication, it is characterized in that,

Above-mentioned light accepting part is to accept simultaneously from the above-mentioned fault detect light of above-mentioned fault detect light illuminating part with from the shared light receiving component of the part of the above-mentioned Communication ray of above-mentioned smooth unloading device.

17. according to claim 15 or 16 described optical detector for communication, it is characterized in that,

Above-mentioned smooth unloading device is arranged on inside and is equipped with on the conjugant with the optical fiber of above-mentioned light transmission path optically-coupled, and above-mentioned fault detect is provided with in the mode towards above-mentioned conjugant with light source.

18. optical detector for communication according to claim 17 is characterized in that,

Above-mentioned conjugant is being formed with grooving portion towards above-mentioned fault detect with the position of light source.

19. according to claim 14 or 18 described optical detector for communication, it is characterized in that,

Above-mentioned conjugant is provided with and makes the reflection part of above-mentioned fault detect light to above-mentioned light receiving component reflection.

20. an optical connector is arranged on the connection light transmission path part each other, it is characterized in that,

Possess conjugant, this conjugant has core and the cladding part with above-mentioned light transmission path optically-coupled,

This conjugant has the refractive index lower than the refractive index of above-mentioned core, and possesses the light unloading device of a part that is used for taking out the above-mentioned Communication ray that transmits at above-mentioned core.

21. optical connector according to claim 20 is characterized in that,

The light that above-mentioned smooth unloading device is formed by the mode with the core that connects above-mentioned conjugant detects and constitutes with groove.

22. optical connector according to claim 21 is characterized in that,

Above-mentioned light detects with the groove and the sensitive surface of above-mentioned light receiving component and is vertically formed the position relative with above-mentioned sensitive surface at above-mentioned conjugant.

23. according to claim 21 or 22 described optical connectors, it is characterized in that,

Above-mentioned light detects with groove and is formed obliquely in the mode that the inclined light shaft with the core of above-mentioned conjugant intersects.

24. according to each described optical connector of claim 21～23, it is characterized in that,

Above-mentioned conjugant is formed with the folding and unfolding groove, and this folding and unfolding groove folding and unfolding is used to accept the light receiving component of the part of the above-mentioned Communication ray that taken out by above-mentioned smooth unloading device, is formed with above-mentioned light and detects and use groove in this folding and unfolding groove.

25. according to each described optical connector of claim 21～24, it is characterized in that,

Above-mentioned light detects and is filled with the resin with refractive index lower than the core of above-mentioned conjugant with groove.

26. according to each described optical connector of claim 20～25, it is characterized in that,

The hoop that above-mentioned conjugant is equipped with optical fiber by inside constitutes, and this hoop is by seeing through above-mentioned leak light and the parts of its scattering being constituted.

27. optical connector according to claim 21 is characterized in that,

Above-mentioned conjugant possesses two hoops that optical fiber is equipped with in inside, and forms above-mentioned light with two hoops of arranged spaced of regulation and detect and use groove, is filled with the resin with refractive index lower than the core of above-mentioned conjugant between two hoops.

28. according to claim 26 or 27 described optical connectors, it is characterized in that,

The diameter of the core of above-mentioned optical fiber and the equal diameters that is bonded on the core of the light transmission path on the above-mentioned conjugant, the cladding diameter of above-mentioned optical fiber is 40～125 μ m.

29. according to each described optical connector of claim 20～28, it is characterized in that,

Also possess optical detection part, this optical detection part has the light receiving component of a part that is used to accept the above-mentioned Communication ray that taken out by above-mentioned smooth unloading device and the output light output component with the light of this light receiving component acceptance.