CN106646775A - Dual-fiber optical module - Google Patents

Dual-fiber optical module Download PDF

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Publication number
CN106646775A
CN106646775A CN201610947173.3A CN201610947173A CN106646775A CN 106646775 A CN106646775 A CN 106646775A CN 201610947173 A CN201610947173 A CN 201610947173A CN 106646775 A CN106646775 A CN 106646775A
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CN
China
Prior art keywords
light
optical
optical axis
component
assembly
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CN201610947173.3A
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Chinese (zh)
Inventor
孙飞龙
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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Priority to CN201610947173.3A priority Critical patent/CN106646775A/en
Publication of CN106646775A publication Critical patent/CN106646775A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4246Bidirectionally operating package structures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40Transceivers

Abstract

The invention discloses a dual-fiber optical module which has an OTDR function. The dual-fiber optical module comprises a first optical receiving component and a first adapter component which are arranged along a first horizontal optical axis. The dual-fiber optical module further comprises a transceiver integrated optical component and a second adapter component. The transceiver integrated optical component includes an optical transmitting component and a second optical receiving component. The height of the transceiver integrated optical component is equal to the height of the first optical receiving component. The second adapter component is arranged along a second horizontal optical axis. The optical transmitting component is arranged along a first inclined optical axis which intersects with the second horizontal optical axis. The second optical receiving component is arranged along a second inclined optical axis which is perpendicular to the first inclined optical axis. The optical transmitting component is used for transmitting a downlink optical signal of which the wavelength is lambda 1, and the downlink optical signal is used as an OTDR test optical signal. The first optical receiving component is used for receiving an uplink optical signal of which the wavelength is lambda 2. The second optical receiving component is used for receiving an OTDR reflected optical signal of which the wavelength is lambda 1'.

Description

A kind of pair of light module
Technical field
The present invention relates to technical field of photo communication, more particularly to a kind of pair of light module.
Background technology
Double light modules at conventional OLT ends, SFP optical modules as shown in Figure 1, a built-in light emission component(TOSA)With One light-receiving component(ROSA), wherein, TOSA is used for completing data signal transmission (electro-optic conversion), and ROSA is used for completing data letter Number receive (opto-electronic conversion).But do not possess monitoring network optical fiber link fault diagnosis functions, once between OLT and certain ONU Network path breaks down, and needs to disconnect OLT first, accesses expensive optical time domain reflectometer (Optical Time Domain Reflector, abbreviation OTDR) trouble-shooting point position, cause the shortcoming of maintenance of network high cost.
OTDR be using light transmit in a fiber when Rayleigh scattering and Fresnel reflection produced by backscattering and Made by accurate optoelectronic integration instrument, it is widely used among the maintenance of lightguide cable link, construction, can carry out optical fiber long The measurement of degree, the transmission attenuation of optical fiber, joint decay and fault location etc..
Single fiber optical assembly with OTDR functions in prior art, for example, the single fiber bidirectional optical component of transceiver, generally It is to increase the second emitting module for launching detection signal on the basis of original receiving unit and emitting module and for connecing The second receiving unit of detection signal is received, produced by the Rayleigh scattering and Fresnel reflection when detection signal is transmitted in a fiber Reflected signal returns to the second receiving unit, and the second receiving unit is processed reflected signal.To add in original module Plus second emitting module and the second receiving unit, optical filter and light splitting are on the one hand additionally increased at the optical axes crosspoint of component Piece, on the other hand also has vacating space(Including height and width)Receive to assemble the second light emission component and second for newly increasing Component so that original size of optical module changes, if customer requirement does not change original size of optical module, will limit light Module possesses OTDR functions.
To sum up, in prior art, for double fine optical assemblies, because light emission component and light-receiving component have respective light Axle, on the basis of the original height of module, width dimensions are not changed, it more difficult to realize OTDR functions.
The content of the invention
The embodiment of the present invention provides a kind of pair of light module, for not changing original module not change module original high On the basis of degree, width dimensions so as to OTDR functions.
The embodiment of the present invention provides a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, the OTDR Double fibre optical assemblies of function include:
First light-receiving component and the first adapter assembly;The first light-receiving component and first adapter assembly Arrange along first level optical axis;
Also include transceiver optical assembly and the second adapter assembly, the transceiver optical assembly includes light emission component With the second light-receiving component;The height of the transceiver optical assembly is highly equal with the first light-receiving component;
Wherein, second adapter assembly is arranged along the second horizontal optical axis;The light emission component is along the first oblique light Axle is arranged, and first tilted optical axis intersect with the described second horizontal optical axis;The second light-receiving component is along the second oblique light Axle is arranged, and second tilted optical axis are perpendicular to first tilted optical axis;
The light emission component, for the downlink optical signal that launch wavelength is λ 1, downlink optical signal conduct simultaneously OTDR detects optical signal;
The first light-receiving component, for the uplink optical signal of a length of λ 2 of received wave;
The second light-receiving component, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
The embodiment of the present invention provides a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, the OTDR Double fibre optical assemblies of function include:
First light-receiving component and the first adapter assembly;The first light-receiving component and first adapter assembly Arrange along first level optical axis;
Also include transceiver optical assembly and the second adapter assembly, transceiver optical assembly and the second adapter group Part is arranged along the second horizontal optical axis;The height phase of the height of the transceiver optical assembly and the first light-receiving component Deng;
Wherein, the transceiver optical assembly includes light emission component and the second light-receiving component;The light emission component Arrange along the second horizontal optical axis, the second light-receiving component is arranged along the optical axis vertical with the described second horizontal optical axis;
The light emission component, for the downlink optical signal that launch wavelength is λ 1, downlink optical signal conduct simultaneously OTDR detects optical signal;
The first light-receiving component, for the uplink optical signal of a length of λ 2 of received wave;
The second light-receiving component, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
In above-described embodiment, double fine optical assemblies include:Transceiver optical assembly includes light emission component and the second light-receiving Component;The first independent light-receiving component.Light emission component is to the second adapter assembly transmitting downlink optical signal λ 1, descending light letter , simultaneously as OTDR fault detect optical signals λ 1, light emission component has OTDR emitting modules and conventional emitting module simultaneously for number λ 1 Function;Second receiving unit of transceiver optical assembly, by the second adapter assembly, receives OTDR reflected light signals λ 1 ' (λ1’=λ1);First receiving unit, by the first adapter assembly, receives uplink optical signal λ 2;Because of OTDR detection optical signals λ 1 It is the optical signal of Same Wavelength with downlink optical signal, a transmitting optical assembly can be saved.Meanwhile, transmitting optical assembly connects with second Receipts component is transceiver structure, need to only lengthen the second adapter assembly or lengthen the body of transceiver optical assembly, The second independent receiving unit can be assembled, and whole optical assembly width and height dimension can be kept constant.Therefore, the present invention is real Apply example double fibre optical assemblies can keep original width and it is highly constant in the case of, possess OTDR functions.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to making needed for embodiment description Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill in field, without having to pay creative labor, can be obtaining it according to these accompanying drawings His accompanying drawing.
Fig. 1 is a kind of structural representation of double fibre optical assemblies of the prior art;
Fig. 2 is a kind of structural representation of double fibre optical assemblies provided in an embodiment of the present invention;
Fig. 3 a are a kind of structural representation of double fibre optical assemblies provided in an embodiment of the present invention;
Fig. 3 b are the structural representation of double fibre optical assemblies that a kind of adapter assembly provided in an embodiment of the present invention is lengthened;
Fig. 4 is the light path schematic diagram of double fibre optical assemblies that a kind of adapter assembly provided in an embodiment of the present invention is lengthened;
Fig. 5 is the comparison structure schematic diagram before and after a kind of adapter assembly provided in an embodiment of the present invention is lengthened;
Fig. 6 is the structural representation of double fibre optical assemblies that transceiver optical assembly body provided in an embodiment of the present invention is lengthened Figure;
Fig. 7 is that the light path of double fibre optical assemblies that transceiver optical assembly body provided in an embodiment of the present invention is lengthened is illustrated Figure.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into One step ground is described in detail, it is clear that described embodiment is only present invention some embodiments, rather than the enforcement of whole Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made All other embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, with OTDR Double fibre optical assemblies of function can be used in double fibre SFP modules encapsulation, and the OTDR functions in this pair of fine optical assembly are integrated in down going wave In long component, using downlink data optical transmitting set port as OTDR detection light transmitter port, while increased a light Receiver port receives OTDR reflected light signals as detection light receiver port, and regular upstream data reception signal is then by list Only light-receiving component(ROSA)To complete.Double fibre optical assemblies of the embodiment of the present invention are encapsulated in double fibre SFP modules, are made pair While fine SFP modules have OTDR functions, the height and width of original double fibre SFP modules is not changed, in the embodiment of the present invention Width refer to the distance between module inner wall of tube shell, highly refer to distance of the module inner wall of tube shell along width vertical direction, it is long Degree refers to module inner wall of tube shell along the axial distance of horizon light.
As Fig. 1 and Fig. 6 is respectively double fibre SFP moulds of original double fibre SFP modules and the integrated OTDR functions of the embodiment of the present invention The structural representation of block, the width and the embodiment of the present invention of original double fibre SFP modules are integrated with double fibre SFP modules of OTDR functions Width be 6.25cm.The height and the embodiment of the present invention of original double fibre SFP modules are integrated with double fibre SFP moulds of OTDR functions The concordance of the height of block is embodied in, the lengthening or transmitting-receiving of the second adapter assembly of double fibre optical assemblies of the embodiment of the present invention After the body of one optical assembly is lengthened, reserve except the space of assembly routine light-receiving component, make the light of transceiver optical assembly Emitting module, light-receiving component can be highly consistent with the assembling of conventional light-receiving component.
Embodiment 1
The embodiment of the present invention provides a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, this pair of fine light Component, as shown in Fig. 2 including:First light-receiving component 1, the first adapter assembly 2, including the light of light emission component 3 and second connect Receive the transceiver optical assembly 5 of component 4, the second adapter assembly 6;Wherein, the height of transceiver optical assembly 5 connects with the first light Receive the highly equal of component 1;First light-receiving component 1 and the first adapter assembly 2 are arranged along first level optical axis X1;Light is sent out The adapter assembly 6 of component 3 and second is penetrated along arranging along the second horizontal optical axis X2, the second light-receiving component 4 along with the second horizon light Axle X2 vertical optical axis is arranged;
For above-mentioned double fibre optical assemblies:Light emission component 3, detects for downlink optical signal and OTDR of the launch wavelength for λ 1 Optical signal, the first light-receiving component 1, for the uplink optical signal of a length of λ 2 of received wave;Second light-receiving component 4, for receiving Wavelength is the OTDR reflected light signals of λ 1 ', wherein, λ 1 '=λ 1.
For above-mentioned double fibre optical assemblies, light emission component 3 is descending to the transmitting downlink optical signal of the second adapter assembly 6 λ 1 Optical signal λ 1 is simultaneously as OTDR fault detect optical signals λ 1, that is to say, that light emission component 3 has OTDR emitting modules simultaneously With the function of conventional emitting module, because OTDR detects the optical signal of optical signal and downlink optical signal for Same Wavelength, relative to existing For having the optical module of multiple light emission components 3 in technology, a transmitting optical assembly can be saved, and some optical filters and Lens subassembly, can reduce the degree of coupling of inter-module, and the installation accuracy for reducing optical assembly is required, also reduces the cost of optical assembly. Transmitting optical assembly is structure as a whole with the second receiving unit, and it is anti-that the second receiving unit receives OTDR by the second adapter assembly 6 Penetrate optical signal λ 1 '(λ1’=λ1).Therefore, such as Fig. 2, only the second adapter assembly 6 need to be lengthened, or by transceiver optical assembly 5 body is lengthened, you can slot milling assembles the first independent receiving unit, and can keep whole optical assembly width and height gauge It is very little constant.Therefore, double fibre optical assemblies of the embodiment of the present invention can keep original width and it is highly constant in the case of, also have Standby OTDR functions.Relative to prior art, the assembling of an emitting module is not only saved, additionally it is possible to ensure the module case of optical module The width and height dimension of body is constant.
Double fibre optical assemblies in for above-described embodiment, if the second adapter assembly 6 is lengthened, slot milling assembling is independent The first receiving unit, and whole optical assembly width and height dimension can be kept constant, in a kind of optional embodiment, second fits Length with device assembly 6 is at least equal to the first light-receiving component 1 and the length sum of the first adapter assembly 2.
Double fibre optical assemblies in for above-described embodiment, if the body of transceiver optical assembly 5 is lengthened, slot milling dress With the first independent light-receiving component 1, and whole optical assembly width and height dimension can be kept constant, a kind of optional embodiment In, needs arrange a relay lens between the adapter assembly 6 of light emission component 3 and second;Relay lens are along the second horizon light Axle X2 is arranged, and relay lens extend can light path focus, and then realizes that the body of transceiver optical assembly 5 is lengthened.
Relay lens can be single lens, and the light inputting end face of relay lens and light output end are convex surface.Optionally, connect Power lens can also be the combination of multiple lens.The shape of relay lens, it is ensured that optical signal is entered after relay lens, relay lens First divergent beams are become into directional light, then again directional light become into converged light, realize the prolongation of focus.
The light end face that above-mentioned double fibre optical assemblies may be mounted at fiber stub is not in the optical module of inclined end face.
Embodiment 2
Based on identical inventive concept, the embodiment of the present invention also provides a kind of pair of light module, its second adapter assembly Fiber stub light end face be inclined end face.
As shown in Figure 3 a, the embodiment of the present invention also provides a kind of pair of light module, including the double fibre light with OTDR functions Component, the light end face of the fiber stub 11 of this pair of fine optical assembly is inclined plane, and this pair of fine optical assembly includes:First light-receiving component 1, the first adapter assembly 2, light transmit-receive integrated optical assembly 5, the second adapter assembly 6;Transceiver optical assembly 5 is launched including light The light-receiving component 4 of component 3 and second;The height of optical transceiver module is highly equal with the first light-receiving component 1;And the first light The adapter assembly 2 of receiving unit 1 and first is arranged along first level optical axis X1;Second adapter assembly 6 is along the second horizon light Axle X2 is arranged;Light emission component 3 is arranged along the first tilted optical axis X3, and the first tilted optical axis X3 optical axis X2s horizontal with second intersects; Second light-receiving component 4 is arranged along the second tilted optical axis Y1, and the second tilted optical axis Y1 is perpendicular to the first tilted optical axis X3;Light is launched Component 3, for downlink optical signal and OTDR of the launch wavelength for λ 1 optical signal is detected;First light-receiving component 1, for received wave The uplink optical signal of a length of λ 2;Second light-receiving component 4, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
Relative to prior art, OTDR detection optical signals and downlink optical signal are the optical signal of Same Wavelength, can be saved One transmitting optical assembly, and some optical filters and lens subassembly, can reduce the degree of coupling of inter-module, reduce the installation of optical assembly Required precision, also reduces the cost of optical assembly.Transmitting optical assembly is structure as a whole with the second receiving unit, the second receiving unit OTDR reflected light signals λ 1 ' is received by the second adapter assembly 6(λ1’=λ1).Therefore, only the second adapter assembly 6 need to be added Body lengthening long or by transceiver optical assembly 5, you can slot milling assembles the first independent receiving unit, and can keep Whole optical assembly width and height dimension are constant.Therefore, double fibre optical assemblies of the embodiment of the present invention can keep original width In the case of highly constant, OTDR functions are also equipped with.
Double fibre optical assemblies in for above-described embodiment, λ 1 '=λ 1, λ 1 are 1490nm, or 1510nm, therefore, above-mentioned enforcement Optical fiber optical assembly in example is applicable in two optical module product, and the descending Guangxin number of an optical module product transmitting is 1490nm, the downlink optical signal of another optical module product transmitting is 1510nm.
For above-mentioned double fibre optical assemblies, λ 2 is 1400nm~1600nm, and the optical fiber optical assembly in the embodiment of the present invention can be fitted With in the optical module product that can receive wideband uplink optical signal.
Double fibre optical assemblies in for above-described embodiment, if the second adapter assembly 6 is lengthened, slot milling assembling is independent The first receiving unit, and whole optical assembly width and height dimension can be kept constant, in a kind of optional embodiment, second fits Length with device assembly 6 at least equal to the first light-receiving component 1 and the length sum of the first adapter assembly 2, referring to Fig. 3 a.
Double fibre optical assemblies in for above-described embodiment, if the body of transceiver optical assembly 5 is lengthened, slot milling dress With the first independent light-receiving component, and whole optical assembly width and height dimension can be kept constant, a kind of optional embodiment In, needs arrange a relay lens between the adapter assembly 6 of light emission component 3 and second;Relay lens are along the first oblique light Axle X3 is arranged, and relay lens extend can light path focus, and then realizes that the body of transceiver optical assembly 5 is lengthened.
Can be found in the relay lens 10 in Fig. 7, relay lens 10 can be single lens, the light inputting end face of relay lens 10 Convex surface is with light output end.Optionally, relay lens 10 can also be the combination of multiple lens.The shape of relay lens 10, Ensure that optical signal is entered after relay lens 10, divergent beams are first become directional light by relay lens 10, then again become directional light Into converged light, the prolongation of focus is realized.
The structure and the body of transceiver optical assembly 5 of the transceiver optical assembly 5 for lengthening to adapter assembly below is lengthened Structure be described in detail.
Embodiment 3
In a kind of alternative embodiment, double light modules include the transceiver optical assembly 5 that the second adapter assembly 6 is lengthened, As illustrated in figures 3 a and 4, transceiver optical assembly 5 includes the structure of the transceiver optical assembly 5 that the second adapter assembly 6 is lengthened The light-receiving component 4 of light emission component 3 and second;Second adapter assembly 6 is arranged along the second horizontal optical axis X2;Light emission component 3 Arrange along the first tilted optical axis X3, the first tilted optical axis X3 optical axis X2s horizontal with second intersects;Second light-receiving component 4 is along second Tilted optical axis Y1 is arranged, and the second tilted optical axis Y1 is perpendicular to the first tilted optical axis X3;For the light in transceiver optical assembly 5 is sent out Component 3 is penetrated, for downlink optical signal and OTDR of the launch wavelength for λ 1 optical signal is detected;For in transceiver optical assembly 5 Second light-receiving component 4, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
Structure after the lengthening of second adapter assembly 6 is referring in Fig. 3 b(1), the fiber stub in the second adapter assembly 6 11 and the elongated portion of the second adapter assembly 6 glued relation referring in Fig. 3 b(2).
Comparison diagram after lengthening with the second adapter assembly 6 before the lengthening of second adapter assembly 6 is referring to Fig. 5.
As shown in figure 4, also setting successively along the first tilted optical axis X3 between the adapter assembly 6 of light emission component 3 and second It is equipped with isolator 7, the first filter plate 8 and absorbing sheet 9;Wherein, isolator 7, the first filter plate 8 set along the first tilted optical axis X3 Put;First filter plate 8, is arranged on the intersection of the first tilted optical axis X3 and the second tilted optical axis Y1;Absorbing sheet 9, is arranged on , there is the reflected light of reflection on the surface of the first filter plate 8 for absorbing downlink optical signal so that double in the underface of one filter plate 8 Fine optical assembly has the performance of more preferably absorption of noise light.
Second light-receiving component 4 includes the first collimating lens 14, the second collimating lens 12, and positioned at the first collimating lens 14 and second the second filter plate 13 between collimating lens 12.First collimating lens 14, the second filter plate 13 and the second collimation are saturating Mirror 12 is arranged along the second tilted optical axis Y1, and the second collimating lens 12 are arranged on the surface of the first filter plate 8.
The effect of isolator 7 is that the optical signal for making light emission component 3 launch passes through from the central through hole of isolator 7, in Heart through hole is arranged along the first tilted optical axis X3, and the optical signal of the transmitting of light emission component 3 is used as downlink optical signal and OTDR detection lights Signal is used.
First filter plate 8 is WDM filter plates(Wavelength Division Multiplexing, wavelength-division multiplex), can The optical signal of different wave length is multiplexed in an optical fiber and is transmitted, each wavelength carries a TDM(Time Division Multiplexing, time division multiplex)The signal of telecommunication.First filter plate 8 allows wavelength for the descending light letter of 1490nm or 1510nm Number pass through, the optical signal for preventing other wavelength passes through.
The effect of the first filter plate 8 is that the optical signal for making wavelength be 1490nm or 1510nm is transmitted along the first tilted optical axis X3 Cross, and prevent other wavelength channels from passing through.And make OTDR reflected light signals be totally reflected on the surface of the first filter plate 8 Afterwards, in the second collimating lens 12 for entering the second light-receiving component 4 along the second tilted optical axis Y1.Preferably, the first filter plate 8 with First tilted optical axis X3, the second tilted optical axis Y1 angles in the counterclockwise direction are respectively 45 degree and 135 °.
Second collimating lens 12 can will form directional light into the diverging light of the second light-receiving component 4, then the second filtering Piece 13 contributes to realizing that product has the ability for making a distinction extremely narrow wavelength interval using parallel optically isolated.
Preferably, the second filter plate 13 is CWDM filter plates(Coarse Wavelength Division Multiplexer, also referred to as coarse wavelength division multiplexer device, Coarse Wave Division Multiplexer).
Second filter plate 13 allows wavelength to pass through for the OTDR reflected light signals of 1490nm or 1510nm, prevents other ripples Long optical signal passes through.
Because OTDR reflected light signals are compared with OTDR detection optical signals, signal intensity has been decayed, accordingly, it would be desirable to second The separable minimum wavelength of filter plate 13 is at intervals of 7nm.Require the phase of second 13 couples of 1490 ± 7nm and 1510 ± 7nm of filter plate Mutually isolation should be greater than 25dB.
The light path principle of transceiver optical assembly 5 is when second adapter assembly is lengthened:Light emission component 3 launches descending light Signal λ 1, Jing after isolator 7, the total transmissivity at the first optical filter, and converge in the fiber stub 11 of the second adapter assembly 6 Exported by the second adapter assembly 6 after oblique light end face;Because downlink optical signal λ 1 believes as the OTDR detection lights of OTDR simultaneously Number, after the second adapter assembly 6 receives OTDR reflected light signals λ 1 ', wherein, OTDR reflected light signals λ 1 ' is OTDR Detection optical signal reflected signal, OTDR reflected light signals λ 1 ' after the light end face of fiber stub 11, along the first tilted optical axis X3 is coupled into the first filter plate 8, and is totally reflected in the first filter plate 8, and connects into the second light along the second tilted optical axis Y1 Component 4 is received, OTDR reflected light signals λ 1 ' becomes collimated light beam Jing after the second collimating lens 12, and collimated light beam is in the second filter plate After 13 are filtered, only retain OTDR reflected light signal of the wavelength for 1490nm or 1510nm, wavelength is 1490nm or 1510nm The first collimating lens of OTDR reflected light signals Jing 14 form a branch of converged light, into the detection chip of the second light-receiving component 4 In 15.The detection chip 15 of the second light-receiving component 4 carries out fiber lengths, light according to the OTDR reflected light signals for receiving The measurement of fine transmission attenuation, joint decay and fault location etc..
For the first receiving unit being independently arranged and the first adapter assembly 2, its light path principle is:In the first light-receiving The 3rd filter plate of a lens and one 45 °, lens and the same optical axis of the 3rd filter plate are provided between group and the first adapter assembly 2 Arrange, the 3rd optical filter allows the optical signal full impregnated mistake of 1400nm~1600nm, and stops that the optical signal of other wavelength passes through, the One light-receiving component 1 receives uplink optical signal by the first adapter assembly 2, and the uplink optical signal of 1400nm~1600nm is from the Three filter plate full impregnated mistakes, are received Jing after lens are converged by the detection chip of the first light-receiving component 1, the first light-receiving component 1 The uplink optical signal for receiving is changed into the signal of telecommunication by detection chip, in the control circuit of electric signal output to optical module.
Embodiment 4
In a kind of preferred embodiment, double light modules include the transceiver optical assembly 5 that body is lengthened, the receipts that body is lengthened The structure of one optical assembly 5 is sent out as shown in fig. 6, being additionally provided with a relay between the adapter assembly 6 of light emission component 3 and second Lens 10, relay lens 10 are arranged along the first tilted optical axis X3.Relay lens 10 are biconvex lens or non-globe lenss, relay lens 10 light inputting end face and light output end are convex surface, and the enlargement ratio of biconvex lens is 1, and relay lens 10 realize prolonging for focus Long, the overall structure stability for making transceiver optical assembly 5 is greatly improved.
The structure that the body of transceiver optical assembly 5 is lengthened also includes:Light emission component 3 is successively set on the relay Isolator 7, the first filter plate 8 between lens 10, absorbing sheet 9;Isolator 7, the first filter plate 8 set along the first tilted optical axis X3 Put, the first filter plate 8 is arranged on the intersection of the first tilted optical axis X3 and the second tilted optical axis Y1, absorbing sheet 9 is arranged on first , there is the reflected light of reflection on the surface of the first filter plate 8 for absorbing downlink optical signal so that double fibres in the underface of filter plate 8 Optical assembly has the performance of more preferably absorption of noise light.
Second light-receiving component 4 includes the first collimating lens 14, the second collimating lens 12, and positioned at the first collimating lens 14 and second the second filter plate 13 between collimating lens 12.First collimating lens 14, the second filter plate 13 and the second collimation are saturating Mirror 12 is arranged along the second tilted optical axis Y1, and the second collimating lens 12 are arranged on the surface of the first filter plate 8.Second collimation is saturating Mirror 12 can form directional light into the diverging light of the second light-receiving component 4, and then the second filter plate 13 adopts parallel optically isolated, Contribute to realizing that product has the ability for making a distinction extremely narrow wavelength interval.
First filter plate 8 and the first tilted optical axis X3, the second tilted optical axis Y1 angles in the counterclockwise direction are respectively 45 Spend and 135 °.First filter plate 8 is WDM filter plates.First filter plate 8 allows wavelength for the descending light of 1490nm or 1510nm Signal passes through, and the optical signal for preventing other wavelength passes through.
Second filter plate 13 is CWDM filter plates, and the second filter plate 13 is arranged along the second tilted optical axis Y1, the second filter plate 13 allow wavelength to pass through for the OTDR reflected light signals of 1490nm or 1510nm, and the optical signal for preventing other wavelength passes through.The The separable minimum wavelength of two filter plate 13 is at intervals of 7nm.Require 13 couples of 1490 ± 7nm's and 1510 ± 7nm of the second filter plate Mutual isolation should be greater than 25dB.
Referring to Fig. 7 transceivers optical assembly 5 body lengthen when, the light path of transceiver optical assembly 5 is:
The transmitting downlink optical signal of light emission component 3 λ 1, Jing after isolator 7, the total transmissivity at the first optical filter, subsequently into In relay lens 10, in order to lengthen conveying length of the optical signal along the first tilted optical axis X3, relay lens 10 are first by converging beam Collimated light beam is changed into, then collimated light beam is changed into into converging beam output, the converging beam of the output of relay lens 10 is converged in Exported by the second adapter assembly 6 after the oblique light end face of the fiber stub 11 of the second adapter assembly 6;Because of downlink optical signal λ 1 detects optical signal as the OTDR of OTDR simultaneously, after the second adapter assembly 6 receives OTDR reflected light signals λ 1 ', Wherein, OTDR reflected light signals λ 1 ' is the reflected signal that OTDR detects optical signal, and OTDR reflected light signals λ 1 ' is inserted by optical fiber After the light end face of core 11, relay lens 10 are coupled into along the first tilted optical axis X3, relay lens 10 first change into converging beam Collimated light beam, then collimated light beam is converted into into converging beam output, the converging beam of the output of relay lens 10 converges in the first filter Wave plate 8, and be totally reflected in the first filter plate 8, the OTDR reflected light signals that total reflection occurs enter along the second tilted optical axis Y1 Enter the second light-receiving component 4, OTDR reflected light signals λ 1 ' becomes collimated light beam Jing after the second collimating lens 12, and collimated light beam exists After second filter plate 13 is filtered, only retain OTDR reflected light signal of the wavelength for 1490nm or 1510nm, wavelength is First collimating lens of OTDR reflected light signals Jing 14 of 1490nm or 1510nm form a branch of converged light, into the second light-receiving group In the detection chip 15 of part 4.The OTDR reflected light signals for receiving are changed into electricity by the detection chip 15 of the second light-receiving component 4 Signal, fiber lengths, the transmission attenuation of optical fiber, joint decay and failure is carried out by being analyzed process to the signal of telecommunication fixed The measurement of position etc..
For the first receiving unit being independently arranged and the first adapter assembly 2, its light path principle is:In the first light-receiving The 3rd filter plate of a lens and one 45 °, lens and the same optical axis of the 3rd filter plate are provided between group and the first adapter assembly 2 Arrange, the 3rd optical filter allows the optical signal full impregnated mistake of 1400nm~1600nm, and stops that the optical signal of other wavelength passes through, the One light-receiving component 1 receives uplink optical signal by the first adapter assembly 2, and the uplink optical signal of 1400nm~1600nm is from the Three filter plate full impregnated mistakes, are received Jing after lens are converged by the detection chip of the first light-receiving component 1, the first light-receiving component 1 The uplink optical signal for receiving is changed into the signal of telecommunication by detection chip, in the control circuit of electric signal output to optical module.
In the embodiment of the present invention, in double light modules of the double fibre optical assemblies with OTDR functions, transceiver optical assembly Light emission component transmitting OTDR detection optical signal and the second light-receiving component receive OTDR reflected light signals, can test Optical fiber link distance be 20km to 150km.
In double light modules of the double fibre optical assemblies with OTDR functions, the transmitting-receiving of the co-wavelength comprising an integrated OTDR functions The light-receiving component of component (OTDR BOSA) and a routine(ROSA), wherein the receiving unit of the OTDR BOSA have can distinguish The ability of extremely narrow wavelength interval.This pair of fine optical assembly can be built in double fiber-optic SFP modular structures, applied long away from, ultra long haul From the double fibre Transmission systems of SFP in, with high application prospect and value.
For example, by the integrated OTDR functions of descending light path of original double fibre SFP optical modules, by an optical transceiver module (BOSA) With a light-receiving component(ROSA)It is built in module, obtains king-size SFP structures, new module can increases except length dimension Plus outward, width and height all meet original SFP standards so that the actual application value of double fibre optical assemblies of the embodiment of the present invention is very It is high.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising these changes and modification.

Claims (10)

1. a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, it is characterised in that the OTDR functions it is double Fine optical assembly includes:
First light-receiving component and the first adapter assembly;The first light-receiving component and the equal edge of first adapter assembly First level optical axis is arranged;
Also include transceiver optical assembly and the second adapter assembly, the transceiver optical assembly includes light emission component and the Two light-receiving components;The height of the transceiver optical assembly is highly equal with the first light-receiving component;
Wherein, second adapter assembly is arranged along the second horizontal optical axis;The light emission component sets along the first tilted optical axis Put, first tilted optical axis intersect with the described second horizontal optical axis;The second light-receiving component sets along the second tilted optical axis Put, second tilted optical axis are perpendicular to first tilted optical axis;
The light emission component, for the downlink optical signal that launch wavelength is λ 1, the downlink optical signal is simultaneously as OTDR inspections Light signal;
The first light-receiving component, for the uplink optical signal of a length of λ 2 of received wave;
The second light-receiving component, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
2. light modules as claimed in claim 1 double, it is characterised in that also include:It is arranged on the light emission component and institute State the relay lens between the second adapter assembly;The relay lens are arranged along first tilted optical axis.
3. light modules as claimed in claim 2 double, it is characterised in that the relay lens are single lens, or multiple The combination of mirror, the light inputting end face of the relay lens and light output end are convex surface.
4. light modules as claimed in claim 2 double, it is characterised in that also include:It is successively set on the light emission component With the isolator between second adapter assembly, the first filter plate, absorbing sheet;
The isolator, first filter plate are arranged along first tilted optical axis, and first filter plate is arranged on described The intersection of the first tilted optical axis and second tilted optical axis, the absorbing sheet is arranged on the lower section of first filter plate, There is the reflected light of reflection on the first filter plate surface for absorbing the downlink optical signal.
5. light modules as claimed in claim 1 double, it is characterised in that the length of second adapter assembly at least equal to The length sum of the first light-receiving component and first adapter assembly.
6. light modules as claimed in claim 5 double, it is characterised in that also include:It is successively set on the light emission component With the isolator between second adapter assembly, the first filter plate and absorbing sheet;
Wherein, the isolator, first filter plate are arranged along first tilted optical axis;
First filter plate, is arranged on the intersection of first tilted optical axis and second tilted optical axis;
The absorbing sheet, is arranged on the underface of first filter plate, for absorbing the downlink optical signal described first There is the reflected light of reflection in filter plate surface.
7. double light modules as any one of claim 1 to 6, it is characterised in that the second light-receiving component bag The first collimating lens, the second collimating lens are included, and between first collimating lens and second collimating lens Second filter plate;
Wherein, second collimating lens will be converted into parallel optical signal into the optical signal of the second light-receiving component.
8. light modules as claimed in claim 7 double, it is characterised in that second filter plate is CWDM filter plates, described The separable minimum wavelength of second filter plate is at intervals of 7nm.
9. light modules as claimed in claim 8 double, it is characterised in that λ 1 be 1490 or 1510nm, λ 2 be 1400~ 1600nm。
10. a kind of pair of light module, including the double fibre optical assemblies with OTDR functions, it is characterised in that the OTDR functions Double fine optical assemblies include:
First light-receiving component and the first adapter assembly;The first light-receiving component and the equal edge of first adapter assembly First level optical axis is arranged;
Also including transceiver optical assembly and the second adapter assembly, transceiver optical assembly and second adapter assembly are equal Arrange along the second horizontal optical axis;The height of the transceiver optical assembly is highly equal with the first light-receiving component;
Wherein, the transceiver optical assembly includes light emission component and the second light-receiving component;The light emission component is along Two horizontal optical axises are arranged, and the second light-receiving component is arranged along the optical axis vertical with the described second horizontal optical axis;
The light emission component, for the downlink optical signal that launch wavelength is λ 1, the downlink optical signal is simultaneously as OTDR inspections Light signal;
The first light-receiving component, for the uplink optical signal of a length of λ 2 of received wave;
The second light-receiving component, for the OTDR reflected light signals of a length of λ 1 ' of received wave.
CN201610947173.3A 2016-10-26 2016-10-26 Dual-fiber optical module Pending CN106646775A (en)

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Application publication date: 20170510