JP6438374B2 - Optical fiber side input / output device and optical fiber side input / output method - Google Patents

Description

  The present invention relates to an optical fiber side input / output device and an optical fiber side input / output method for inputting and outputting light from the side of a bent optical fiber ribbon.

  In order to input and output light from the side of the bent optical fiber in the optical line switching work in the optical access network, it is composed of an optical transparent member having a bent shape and a probe fiber for inputting and outputting light from the side of the optical fiber. An optical fiber side input / output technology related to the related technology has been proposed (see, for example, Patent Document 1).

  Also proposed is an optical fiber side input / output device according to the related art that forms a bent shape by holding the optical fiber side input / output part in advance and bending both ends of the optical fiber later. (For example, see Patent Document 2).

JP 2009-25210 A JP 2014-228279 A

  However, the optical fiber core plane and probe bent due to various factors such as reliability of the dynamic mechanism, linear expansion of the structure, and core eccentricity of the optical fiber in lateral input / output of light with severe tolerance in the Z-axis direction described later There was a gap between the fiber core plane and it was difficult to stably input / output light laterally.

  In order to solve the above problems, in view of the above problems, the present invention provides an optical fiber with a gentle bending that does not affect communication, confirms the presence or absence of axial misalignment, and An object of the present invention is to provide an optical fiber side input / output device with improved stability of further bending the optical fiber after alignment in the Z-axis direction when there is a deviation.

  In order to achieve the above object, in the present invention, when an optical fiber is sandwiched between a V-groove push-bending portion and a V-groove optical transparent member, a bent shape having a large bending opening angle given to the optical transparent member is formed, At that time, while the probe fiber receives light leaking from the bent optical fiber, the V-grooved push-bend part is moved to adjust the alignment to a position with high coupling efficiency, and then the optical fiber bending cylindrical part is moved to the optical fiber. By making it close to the fiber, the optical fiber is bent in a small bending angle, and stable light lateral input / output is performed.

Specifically, the optical fiber side input / output device according to the present invention is:
A convex V-grooved optical fiber push-bend portion having a first V-groove guide for pushing and holding the optical fiber;
A second has a V-groove guide, the protruded concave shape corresponding to the formed on the second V-groove guide the V grooved optical transparent member for holding the optical fiber,
A probe fiber for inputting and outputting light from the side of the push and the optical fiber was bending in the arranged near the concave and the V grooved optical fiber press bending portion of the V grooved optical transparent member ,
A cylindrical part for bending an optical fiber for forming a bent shape of the optical fiber at an opening angle of the convex shape ;
Is provided.

In the optical fiber side input / output device according to the present invention,
Before SL first V-groove guide is arranged in any of the V-groove pitch,
The V-grooved optical transparent member is:
The second V-groove guide is formed at a position corresponding to the first V-groove guide;
The concave shape may be formed in a bent shape having an opening angle larger than an opening angle that is pushed and bent by the V-grooved optical fiber bending portion.

In the optical fiber side input / output device according to the present invention, the V-grooved optical fiber pushing / bending portion is perpendicular to both the movable direction in which the optical fiber is sandwiched and the V-groove direction of the first V-groove guide. Furthermore, you may further provide the alignment mechanism which enables the said optical groove pushing and bending part with a V groove to move .

In the optical fiber side input / output device according to the present invention,
Tip and the concave bottom portion of the convex shape, when I write sandwiching the optical fiber, said front bending angle defined by the concave shape of the opening angle formed in the V grooved optical transparent member SL Push and bend the optical fiber , leak light from the optical fiber located at the bottom of the concave shape ,
Light leaking from the concave bottom may be incident on the probe fiber .

In the optical fiber side input / output device according to the present invention,
Before SL optical fiber bending for cylindrical components, press bent the optical fiber, pressure push toward the center position of the push V grooved optical fiber bending unit, the bending angle subtended by the opening angle of the convex The optical fiber may be pushed and bent .

Specifically, the optical fiber side input / output method according to the present invention is:
The convex tip of the V-grooved optical fiber push-bending portion having a convex shape and provided with a first V-groove guide for holding the optical fiber at the convex tip and the optical fiber are held. And a concave shape corresponding to the convex shape is formed on the second V-groove guide and the concave bottom portion of the V-grooved optical transparent member formed on the second V-groove guide. an optical fiber arrangement procedure for sandwiching,
The movable direction of the V-grooved optical fiber bending portion that sandwiches the optical fiber while outputting light to the probe fiber from the side of the optical fiber pushed and bent by the V-grooved optical fiber bending portion, and the V A light input / output procedure for aligning the optical fiber and the probe fiber by moving the V-groove optical fiber push-bend portion in a direction perpendicular to both of the V-groove directions of the grooved optical fiber push-bend portion ;
The optical fiber pushed and bent by the V-grooved optical fiber pushing / bending portion is pressed toward the center position of the V-grooved optical fiber pushing / bending portion using an optical fiber bending cylindrical part, and the convex shape A bending shape forming procedure in which the optical fiber is pushed and bent at a bending angle determined by an opening angle;
I do.

  In the optical fiber side input / output device according to the present invention, a V-grooved pushing / bending portion, a pushing / bending portion slider, a V-grooved optical transparent member, a probe fiber for inputting / outputting light from the side, And an optical fiber side input / output device comprising an optical fiber bending cylindrical part, and a bending imparted to the optical transparent member when the optical fiber is sandwiched between the V-groove push-bending portion and the V-groove optical transparent member. A bending shape with a large opening angle may be formed, and then the optical fiber bending cylindrical part may be brought close to the pressing and bending portion, so that the optical fiber is bent into a bending shape with a small bending angle.

  Further, in the optical fiber side input / output device according to the present invention, the Z-axis scanning stage is used in the bent state with the large opening angle by scanning the V-grooved pushing / bending portion in the Z-axis direction. The bending optical fiber and the probe fiber may be aligned in the direction.

  The above inventions can be combined as much as possible.

  According to the present invention, the optical fiber is subjected to a gentle bending that does not affect the communication, the presence or absence of axial misalignment is confirmed, and if there is an axial misalignment, the optical axis is aligned after the alignment in the Z-axis direction. It is possible to provide an optical fiber side input / output device with improved stability of further bending the fiber.

  The optical fiber side input / output device of the present invention is configured to bend with a large opening angle provided in the optical transparent member by holding the optical fiber in the V-groove provided in the optical transparent member with a pushing / bending portion. In this state, a minute optical signal can be detected by the probe fiber provided inside the optical transparent member.

  Further, by scanning the push-bend portion in the Z-axis direction, the bent optical fiber and the probe fiber can be aligned in the Z-axis direction. After confirming the alignment, the bent optical fiber forms a bend along a push-bend portion with a small opening angle, and side-to-side input / output of light with higher coupling efficiency becomes possible.

  Therefore, according to the present invention, the bending optical fiber and the probe fiber are bent before the bending operation in the optical line switching work in which the working optical fiber is bent and the bypass communication path is formed by the light input / output from the side. This makes it possible to check and correct the alignment of the work and improve work reliability. In addition, by controlling the number and pitch of V-grooves provided in the push-bending part and the optical transparent member and arraying probe fibers, the side of multi-core light can be used in the construction work for 4-core or 8-core optical fiber ribbons. Input / output can be easily performed.

It is a figure for demonstrating the structure of an optical fiber side input / output device. It is a figure for demonstrating the optical fiber bending method which concerns on related technology. It is a figure for demonstrating the optical fiber bending method which concerns on this embodiment. It is a figure for demonstrating the two-step bending which concerns on this embodiment. It is a figure for demonstrating the two-step bending which concerns on this embodiment. It is a figure for demonstrating the structure of the probe fiber array arranged with arbitrary pitches. It is a figure for demonstrating the probe fiber array which concerns on this embodiment. It is a figure for demonstrating the structure of the optical transparent member which concerns on this embodiment. It is a figure for demonstrating the opening angle of an optical transparent member bending part. It is a figure for demonstrating the structure of an optical fiber bending part, and a bending part opening angle. It is a figure for demonstrating a series of operation | movement of the method of inputting and outputting light from a side by bending an optical fiber. FIG. 11 is a diagram for explaining that the optical fiber in the first step is installed in the V-groove provided in the optical transparent member. It is a figure for demonstrating a series of operation | movement of the method of inputting and outputting light from a side by bending an optical fiber. FIG. 12 is a view for explaining that the optical fiber in the second step is pressed and fixed from above with a lid so as not to deviate from the V-groove provided in the optical transparent member. It is a figure for demonstrating a series of operation | movement of the method of inputting and outputting light from a side by bending an optical fiber. FIG. 13 is a diagram for explaining that a gentle bend is formed by firmly holding the optical fiber fixed in the V groove of the optically transparent member in the third step and holding it in the V groove of the bending portion. It is a figure for demonstrating a series of operation | movement of the method of inputting and outputting light from a side by bending an optical fiber. FIG. 14 is a diagram for explaining that the lid is opened so that the cylindrical part can operate in order to sharply bend the optical fiber installed in the fourth step. It is a figure of the intensity distribution obtained by measuring the intensity | strength of the light leaked in the state which bent the optical fiber gently, and scanning to a Z-axis direction. It is a figure for demonstrating a series of operation | movement of the method of inputting and outputting light from a side by bending an optical fiber. FIG. 16 is a diagram for explaining a sharp bend of an optical fiber installed by moving the two cylindrical parts in the fifth step so as to be close to the push-bending portion. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. In FIG. 17, the equipment configuration of the optical access network and SS optical access system will be described. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. FIG. 18 illustrates a method for preparing a bypass communication path. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. FIG. 19 illustrates that an optical fiber side input / output device is prepared by separating a single core of the optical fiber ribbon of the current equipment. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. In FIG. 20, the alignment of the optical fiber side input / output device will be described. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. FIG. 21 illustrates optical line switching using an optical fiber side input / output device. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. In FIG. 22, an equipment configuration of the optical access network and the PON optical access system will be described. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. In FIG. 23, the installation form of the optical fiber side input / output device before the test light is incident will be described. It is a figure explaining the optical line switching construction implementation method using an optical fiber side input / output device. FIG. 24 illustrates a test light incidence method using the optical fiber side input / output device of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to embodiment shown below. These embodiments are merely examples, and the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art. In the present specification and drawings, the same reference numerals denote the same components.

(Embodiment 1)
The basic configuration of the optical fiber side input / output device according to this embodiment will be described below. An optical fiber side input / output device according to the present embodiment includes an optical fiber pushing / bending portion with a V groove, an optical transparent member functioning as an optical transparent member with a V groove, a probe fiber, and a cylindrical part for bending an optical fiber, Is provided.

  The optical fiber pushing / bending portion with the V-groove has a first V-groove guide that is a V-groove for pushing and holding the optical fiber and is formed in a convex shape. The V-grooved optical transparent member has a second V-groove guide that is a V-groove formed at a position corresponding to the V-groove of the V-groove optical fiber push-bend portion. It is the concave shape formed with the opening angle larger than the opening angle which push-bends.

  In this embodiment, a steep bend is applied to the optical fiber from a state in which the optical fiber is gently bent, and light enters the optical fiber bent from the probe fiber fixed to the optical transparent member. An optical fiber side input / output device capable of outputting will be described.

  For the sake of explanation, each direction is defined as shown in FIG. That is, the direction along the movable direction of the bending portion 2 that functions as the V-grooved optical fiber bending portion of the optical fiber side input / output device 1 is the “X-axis direction”, and the optical direction of the optical fiber side input / output device 1 The direction orthogonal to the X-axis direction along the direction of the transparent member V-groove 11 is referred to as “Y-axis direction”, and the direction orthogonal to the X-axis direction and the Y-axis direction is referred to as “Z-axis direction”.

  FIG. 1 is a diagram for explaining the configuration of the optical fiber side input / output device 1. From the side of the bent optical fiber and the V-grooved optical transparent member 10 provided with a bending shape having an opening angle larger than the opening angle of the V-grooved optical fiber pushing and bending portion 2 and the V-grooved optical fiber pushing and bending portion 2 A probe fiber array 20 for inputting and outputting light, optical fiber bending cylindrical parts 30 and 31 and a Z-axis scanning stage 4 for forming a bent shape with an opening angle of the V-grooved optical fiber push-bending portion are provided. This is an optical fiber side input / output device 1 characterized by that.

  Here, a method of fixing the probe fiber array 20 to the V-grooved optical transparent member 10 will be described. In the V-grooved optical transparent member 10 provided with a space for filling the ultraviolet curable resin 12 in advance, a probe fiber array 20 capable of position control in the XYZ-axis direction is prepared while the ultraviolet curable resin 12 is filled.

  In this state, the optical fiber 40 into which the continuous light is inserted is sandwiched between the bending portion 2 and the optical transparent member 10, and the optical fiber 40 is aligned with the continuous light of the leaked light and the optical fiber coupling of the probe fiber array 20. The probe fiber array 20 and the optical transparent member 10 can be fixed by curing the ultraviolet curable resin 12.

  Further, for example, by providing a micrometer or a stepping motor between the pushing / bending slider 5 and the pushing / bending portion 2 for the Z-axis scanning stage 4, the pushing / bending portion V-groove 3 can be scanned in the Z-axis direction. Become.

  According to the optical fiber side input / output device 1 as described above, instead of the unique bending formation according to the related art as shown in FIG. Then, it can be bent to the same angle as the bending angle 8 for pushing and bending to form a two-stage bending that improves the input / output coupling efficiency of light from the side of the optical fiber.

  In this two-stage bending, the push bending portion bending radius R9 and the optical transparent member bending radius R17 are common, and the core portion bending radius of the optical fiber 40 is uniquely determined. The optical signal 19 propagating through the optical fiber 40 is coupled to the probe fiber array 20 in the direction shown in FIG. Moreover, as shown in FIGS. 4 and 5, the optical fibers 40 bent by the push bending portion 2 may be bent along different optical transparent member bending opening angles 16.

  Here, in order to make the core part bending radius of the optical fiber 40 unique, a small difference between the bending bending radius R9 of the push bending part considering the inner diameter and outer diameter of the optical fiber 40 and the optical transparent member bending radius R17, for example, outer In order to bend the optical fiber 40 having a diameter of 0.25 mm, a difference of 0.25 mm may be generated between the bend radii.

  Next, the opening angle of the bending shape provided in the push bending part 2 and the optical transparent member 10 will be described. For example, when the bending radius of the bending portion 2 is 2 mm, the opening angle of the bending portion is 90 ° (the arc length of the bending is 2 × 2 × π × 90/360 = π mm). It is possible to obtain a coupling efficiency capable of performing the optical line switching work.

  Further, the bending provided in the optical transparent member 10 is, for example, when the bending radius is 2 mm, the optical transparent member opening angle is 160 ° (the arc length of the bending is 2 × 2 × π × 20/360 = 2 / 9πmm). Thus, it is possible to achieve a bending loss of 2 dB or less that does not affect the intended current service.

  As described above, after confirming the optical axis alignment between the bent optical fiber and the probe fiber array 20 with a minute optical signal without affecting the current service, it is possible to shift to the side input / output of light with high coupling efficiency. It becomes.

  Moreover, the number of the optical fibers 40 sandwiched by the V-grooves provided in the pushing / bending portion 2 and the optical transparent member 10 may be singular or plural. Hereinafter, in the present embodiment, description will be made on the assumption that the number of V-grooves corresponding to the number of four cores of the aerial optical fiber ribbon is four.

  FIG. 6 is a diagram for explaining the structure of the probe fiber array 20 arranged at an arbitrary pitch. For example, a GRIN lens is attached to a V-groove probe fiber fixture arranged at the same pitch as the V-groove pitch of a plurality of V-groove optical fiber push-bending portions 2 described later and the V-groove pitch of the plurality of V-groove optical transparent members 10. The attached probe fiber is placed and sandwiched between the probe fiber fixtures 21.

  It is desirable that the space formed between the probe fiber fixture 21 and the probe fiber is filled with the ultraviolet curable resin 23 and fixed firmly. According to such a probe fiber array 20, optical fibers are input / output from the side of the optical fiber after the single-fiber separated four-fiber or eight-fiber optical fiber ribbons are arranged at an arbitrary pitch and bent. Can be performed at the same time with high accuracy.

  7 and 8 are views for explaining the structure of the optical transparent member 10 to which a gentle bending shape is given. The optical transparent member 10 is provided with a bending shape in which a bending opening angle 16 as shown in FIG.

  Further, it is desirable that V-grooves for aligning a plurality of optical fibers are provided on the surface to which the bent shape is provided. The shape of the groove may be a U-shaped groove or a trapezoidal groove as long as the optical fibers can be aligned. A probe fiber array 20 is arranged in the optical transparent member 10.

  According to such an optical transparent member 10, it is possible to gently bend the optical fiber along the optical transparent member bending opening angle 16 or sharply bend along the pushing bending portion bending opening angle 8 described later. is there. Further, when the optical fiber is bent as described above, light can be input / output from the side of the optical fiber via the probe fiber array 20.

  FIG. 10 is a view for explaining the structure of the optical fiber pushing and bending portion 2 and the pushing and bending portion opening angle 8. The optical fiber push-bending part 2 is provided with V grooves arranged at the same pitch as the V grooves provided on the optical transparent member 10 described above. The shape of the groove may be a U-shaped groove or a trapezoidal groove as long as the optical fibers can be aligned.

  Moreover, the pushing and bending portion opening angle 8 is smaller than the bending opening angle 16 of the optical transparent member 10 described above. The optical fiber pushing / bending portion 2 is movable positive and negative in the X-axis direction by a pushing / bending slider 5. Further, it is desirable that a spring 6 and a push screw 7 are provided to the optical fiber pushing and bending portion 2.

  According to such an optical fiber pushing / bending portion 2, the optical fiber 40 installed on the optical transparent member 10 can be gently bent along the optical transparent member bending opening angle 16 in the first stage. Further, in the second stage, it becomes possible to bend sharply along the push-bending portion opening angle 8 using optical fiber bending cylindrical parts 30 and 31 described later.

  Further, the optical fiber 40 is installed between the push-bending portion 2 opened by the tension of the spring 6 and the optical transparent member 10, and the push-bending portion 2 is not damaged to the optical transparent member 10 by the push screw 7. It is possible to push gently and slowly.

  The optical input / output method and alignment method of the optical fiber side input / output device 1 according to the present embodiment will be described below with reference to FIGS. FIGS. 11-16 is a figure for demonstrating the method and the alignment method which input / output light from the optical fiber side using the optical fiber side input / output device 1 of this embodiment. In the first step of FIG. 11, one or more optical fibers 40 are installed in the optical transparent member V-groove 11 provided in the optical transparent member 10.

  At this time, the gravitational direction is desirably negative in the X-axis direction. Further, the optical fiber 40 is placed above the optical fiber bending cylindrical parts 30 and 31 for later bending by the optical fiber bending cylindrical part (A) 30 and the optical fiber bending cylindrical part (B) 31.

  In the second step of FIG. 12, the optical fiber 40 is firmly held by the lid 15 provided on the optical transparent member 10 so as not to deviate from the optical transparent member V-groove 11. At this time, for example, by providing a magnet to the optical transparent member 10 and the lid 15, the above-described gripping can be stabilized.

  In the third step of FIG. 13, the optical fiber pressing and bending portion 2 is pressed against the optical transparent member 10. Thereby, the optical fiber 40 is bent at the bending opening angle 16 of the optical transparent member, and light input / output can be performed from the side of the optical fiber 40 while the coupling efficiency is small.

  In the fourth step of FIG. 14, preparation is made to open the lid 15 and bend the optical fiber 40 at the pushing and bending portion opening angle 8. At this time, it is possible to detect the peak value of light by scanning the push-bending portion 2 in the Z-axis direction. Specifically, the Z axis v. As shown in FIG. s. An optical signal intensity diagram is acquired, and the optical fiber 40 and the probe fiber array 20 can be aligned at a position where the optical coupling efficiency is highest.

  In the fifth step of FIG. 16, the optical fiber bending cylindrical part (A) 30 and the optical fiber bending cylindrical part (B) 31 are brought close to the optical fiber bending part 2, and the optical fiber 40 is pushed at the bending part opening angle 8. It can be bent.

  Hereinafter, description will be given using an optical line switching method using an optical fiber side input / output device in the optical access network according to the present embodiment. Here, an embodiment of an optical line switching construction using the above-described optical fiber side input / output device will be described. The facility form describes an SS optical access system and a PON optical access system.

  FIG. 17 shows an equipment configuration of the SS optical access system. The OLT 51 is installed in the station building 50, and the ONU 60 is installed on the user side. The intra-office optical cable 54 from the OLT 51 is terminated by a termination rack 52, connected to a termination cable 57 outside the office via an intra-office optical coupler 55, and wired to each user. The optical fiber in the termination cable 57 is a four-core tape core wire 62 in which four optical fibers are connected.

  FIG. 18 shows an outline of preparation of a detour route for performing optical line switching work. In the office building 50, the test port of the intra-office optical coupler 55 to which the target intra-office optical cable 54 is connected is connected to the detour communication intra-office optical cable 58, and this is used as an empty detour communication intra-office light. The coupler 56 is connected. Further, this bypass communication intra-office optical coupler 56 is connected to the empty bypass communication 4-core tape core 63 of the termination cable 57.

  FIG. 19 shows an outline of construction preparation at the optical line switching point. In order to sandwich the optical fiber in the optical fiber side input / output device 1 at the optical line switching point, the four-core tape core wire 62 is separated into a single core. Further, the optical fiber side input / output device 1 and the power meter 70 are connected by an optical fiber cable 71 in order to align the optical fiber with the probe fiber 24 before the optical signal is diverted by the optical fiber side input / output device 1. To do.

  FIG. 20 shows alignment by the optical fiber side input / output device 1. The single-core separated four-core tape core wire 62 is installed in the optical fiber side input / output device 1 (see the first step in FIG. 11 to the third step in FIG. 13). The installed 4-core tape core wire 62 is lightly bent so that a continuous optical signal from the ONU 60 can be received. The received optical power at this time is recorded by the power meter 70, and the pushing / bending portion 2 of the optical fiber side input / output device 1 is scanned in the Z-axis direction for alignment (see the fourth step in FIG. 14).

  FIG. 21 shows detour communication of an optical line using the optical fiber side input / output device 1. After the above alignment, the optical fiber cable 71 connected to the optical fiber side input / output device 1 is connected to the optical repeater amplifier (repeater) 72. Further, a bypass communication 4-core tape core wire 63 is connected to the optical repeater amplifier (repeater) 72.

  After the connection is completed, the 4-core tape core wire 62 installed in the optical fiber side input / output device 1 is pushed and bent at the bending portion opening angle 8 (see the fifth step in FIG. 16). As described above, the optical signal of the 4-fiber ribbon 62 in the optical line switching construction section 80 is switched to the 4-wire tape 63 for detour communication, and detour communication is possible.

  In the optical line switching construction, the four-core tape core wire 62 is cut and fusion-bonded with the new four-core tape core wire in the optical line switching construction section 80 during the detour communication, and finally the four-core tape core wire 62 is used. The optical signal that had been bypassed is cut back by releasing the bend that had been applied.

  FIG. 22 shows an equipment configuration of the PON optical access system. The OLT 51 is installed in the station building 50, and the ONU 60 is installed on the user side. The intra-office optical cable 54 from the OLT 51 is terminated by a termination rack 52, is connected to a termination cable 57 outside the office via the intra-station 4-branch splitter 53 and the intra-office optical coupler 55, and is wired to each user. .

  The optical fiber in the termination cable 57 is a four-core tape core 62 in which four optical fibers are connected, and is branched and wired by an outdoor 8-branch splitter 61 near the user. The preparation of the detour route in the office building 50 and the preparation for the construction at the optical line switching point are as described above.

  FIG. 23 shows an alignment method of the optical fiber side input / output device 1 in the PON optical access system facility. In the case of this equipment configuration, since the optical signal from the ONU 60 is a burst signal and power measurement is difficult, the test light is incident on one optical fiber side input / output device 1 and the other optical fiber side The input / output device 1 performs alignment and bypass communication.

  First, the optical fiber side input / output device 1 and the test light source 73 (wavelength: 1650 nm) are connected by the optical fiber cable 71. At this time, the optical fiber side input / output device 1 is arranged in the direction in which the test light propagates to the OLT 51 side, and the single-core separated four-core tape core wire 62 is installed (from the first step in FIG. 11 to the third step in FIG. 13). Process). FIG. 24 shows the test light incidence method and alignment method.

  An optical fiber side input / output device 1 for bypass communication is arranged on the OLT 51 side from the optical fiber side input / output device 1 for test light incidence, and a single-fiber separated four-fiber tape core wire 62 is connected to the optical fiber side input / output device. (See the first step in FIG. 11 to the third step in FIG. 13). In this state, test light is incident from the test light source 73, and the light receiving power of the light is measured by the power meter 70 connected to the optical fiber side input / output device 1 for bypass communication.

  Next, the pushing / bending portion 2 is scanned in the Z-axis direction (see the fourth step in FIG. 14). At this time, when the power of the test light to be recorded is weak, also in the optical fiber side input / output device 1 for test light incidence, the pushing / bending portion 2 is scanned in the Z-axis direction to increase the power intensity of the test light incident thereon. .

  After completion of alignment by the optical fiber side input / output device 1 for bypass communication, the installed four-core tape core wire 62 is pushed and bent at an opening angle 8 (see the fifth step in FIG. 16). As described above, the optical signal of the 4-fiber ribbon 62 in the optical line switching construction section 80 is switched to the 4-wire tape 63 for detour communication, and detour communication is possible.

  By the above method, it is possible to confirm whether the Z-axis alignment is correctly performed by detecting the peak value before switching the optical line of the optical fiber 40 in the optical fiber side input / output method. Can be improved. Further, when a plurality of optical fibers 40 are sandwiched, the distance between the peak values can be grasped.

  According to the present invention, even if there are a plurality of optical fibers, it is possible to stably input and output light from the side of the optical fiber by simultaneously bending the optical fiber. Further, the optical fiber opening angle of the optical fiber side input / output device 1 can be controlled in two stages. As a result, the Z-axis direction alignment can be confirmed without affecting the service of the working core wire, and the work reliability can be improved.

  Furthermore, according to the present invention, the optical fiber test that is possible even if the coupling efficiency is relatively small without affecting the service of the working core and the service of the working core is affected, but the coupling efficiency is large. It becomes possible to carry out the optical line test that can be performed with one apparatus.

  In addition, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some configurations may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different example embodiments may be combined as appropriate.

  The present invention can be applied to the information communication industry.

1: Optical fiber side input / output device 2: Push-bending part 3: Push-bending part V groove 4: Z-axis scanning stage 5: Push-bending slider 6: Spring 7: Push screw 8: Push-bending part opening angle 9: Push Bending radius B
10: Optical transparent member 11: V groove for optical transparent member 12: UV curable resin 13: Slow bending shape 14: Magnet 15: Lid 16: Bending opening angle of optical transparent member 17: Optical transparent member bending radius R
19: Signal light 20: Probe fiber array 21: Probe fiber fixture 22: Probe fiber fixture 23 with V groove 23: UV curable resin 24: Probe fiber 30: Cylindrical component for bending optical fiber (A)
31: Cylindrical parts for optical fiber bending (Otsu)
40: Optical fiber 50: Office 51: OLT
52: Termination frame 53: Intra-station 4-branch splitter 54: In-station optical cable 55: In-station optical coupler 56: In-station optical coupler 57: Termination cable 58: In-station optical cable 60: ONU
61: Outdoor 8-branch splitter 62: 4-fiber ribbon 63: 4-fiber ribbon 70 for detour communication 70: Power meter 71: Optical fiber cable 72: Optical repeater amplifier (repeater)
73: Test light source 80: Optical line switching construction section

Claims (5)

A convex V-grooved optical fiber push-bend portion having a first V-groove guide for pushing and holding the optical fiber;
A second has a V-groove guide, the protruded concave shape corresponding to the formed on the second V-groove guide the V grooved optical transparent member for holding the optical fiber,
A probe fiber for inputting and outputting light from the side of the push and the optical fiber was bending in the arranged near the concave and the V grooved optical fiber press bending portion of the V grooved optical transparent member ,
A cylindrical part for bending an optical fiber for forming a bent shape of the optical fiber at an opening angle of the convex shape ;
The V-grooved optical fiber pushing / bending portion moves the V-grooved optical fiber pushing / bending portion in a direction perpendicular to both the movable direction in which the optical fiber is sandwiched and the V-groove direction of the first V-groove guide. An alignment mechanism to enable,
An optical fiber side input / output device comprising: Before SL first V-groove guide is arranged in any of the V-groove pitch,
The V-grooved optical transparent member is:
The second V-groove guide is formed at a position corresponding to the first V-groove guide;
2. The optical fiber side input / output device according to claim 1, wherein the concave shape is formed in a bent shape having an opening angle larger than an opening angle pushed and bent by the V-grooved optical fiber pushing and bending portion. Tip and the concave bottom portion of the convex shape, when I write sandwiching the optical fiber, said front bending angle defined by the concave shape of the opening angle formed in the V grooved optical transparent member SL Push and bend the optical fiber , leak light from the optical fiber located at the bottom of the concave shape ,
Light leaked from the concave bottom is incident on the probe fiber,
The optical fiber side input / output device according to claim 1 or 2. Before SL optical fiber bending for cylindrical components, press bent the optical fiber, pressure push toward the center position of the push V grooved optical fiber bending unit, the bending angle subtended by the opening angle of the convex Bending optical fiber,
The optical fiber side input / output device according to claim 3 . The convex tip of the V-grooved optical fiber push-bending portion having a convex shape and provided with a first V-groove guide for holding the optical fiber at the convex tip and the optical fiber are held. And a concave shape corresponding to the convex shape is formed on the second V-groove guide and the concave bottom portion of the V-grooved optical transparent member formed on the second V-groove guide. an optical fiber arrangement procedure for sandwiching,
The movable direction of the V-grooved optical fiber bending portion that sandwiches the optical fiber while outputting light to the probe fiber from the side of the optical fiber pushed and bent by the V-grooved optical fiber bending portion, and the V A light input / output procedure for aligning the optical fiber and the probe fiber by moving the V-groove optical fiber push-bend portion in a direction perpendicular to both of the V-groove directions of the grooved optical fiber push-bend portion ;
The optical fiber pushed and bent by the V-grooved optical fiber pushing / bending portion is pressed toward the center position of the V-grooved optical fiber pushing / bending portion using an optical fiber bending cylindrical part, and the convex shape A bending shape forming procedure in which the optical fiber is pushed and bent at a bending angle determined by an opening angle;
An optical fiber side input / output method characterized by:

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