CN203519885U - Single-fiber two-way transmission assembly with built-in OTDR function - Google Patents
Single-fiber two-way transmission assembly with built-in OTDR function Download PDFInfo
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- CN203519885U CN203519885U CN201320590141.4U CN201320590141U CN203519885U CN 203519885 U CN203519885 U CN 203519885U CN 201320590141 U CN201320590141 U CN 201320590141U CN 203519885 U CN203519885 U CN 203519885U
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- single fiber
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Abstract
The utility model discloses a single-fiber two-way transmission assembly with a built-in OTDR function. The single-fiber two-way transmission assembly comprises a light splitting device, a WDM filter, a single fiber, a coaxial light emitting assembly, a first coaxial light receiving device and a second light receiving device. The coaxial light emitting assembly and the single fiber are arranged opposite to each other and form a horizontal optical axis of optical path transmission. The light splitting device and the WDM filter are arranged on the horizontal optical axis between the coaxial light emitting assembly and the single fiber in sequence. The first coaxial light receiving device and the second light receiving device are arranged on two sides of the horizontal optical axis and are perpendicular to the horizontal optical axis. The first coaxial light receiving device receives optical signals reflected by the light splitting device, and the second light receiving device receives optical signals reflected by the WDM filter. By adopting the single-fiber two-way transmission assembly, fault information in the network transmission process can be monitored, and the composition structure is simplified.
Description
Technical field
The utility model relates to a kind of single optical bidirectional transmission light-transceiving integrated module, relates in particular to a kind of single fiber transmitted in both directions assembly of built-in OTDR function.
Background technology
Light transmitting-receiving subassembly for OLT mainly adopts single fiber bidirectional component at present, this assembly is by a single fiber, one TO-CAN encapsulation light emission component, one TO-CAN encapsulation optical fiber receive module and a wavelength-division multiplex (Wavelength Division Multiplexing, abbreviation WDM) the light transmit-receive integrated assembly that wave filter forms, be mainly used in realizing the communication of OLT terminal and user side, and do not possess the failure message in monitor network transmitting procedure, in needs Network Search sublink during trouble spot, mainly adopt at present expensive optical time domain reflectometer (Optical Time Domain Reflector, be called for short OTDR).When OLT end detection failure, once certain network sublink breaks down, whole OLT end must be disconnected, then access the particular location of OTDR trouble-shooting point, other network service corresponding to same like this OLT module will all be interrupted; If in the position of the user side fault inspecting reporting an error, although the method does not affect other network service of OLT end respective links, the personnel of needing repairing make house calls.
For overcoming above shortcoming, Fig. 1 is that Chinese utility model patent application number is a kind of single fiber transmitted in both directions assembly described in 201020613106.6, single-fiber two-way transmission light transceiver module as shown in Fig. 1, wherein, TO-CAN encapsulation light emission component 10 will converge light by the first globe lens 30 to the downlink optical signal λ 1 of user side transmitting after by free space type optoisolator 20 and become directional light, the parallel light-dividing device 40 that is incident to, light-dividing device 40 carries out respectively transmission and reflection by downlink optical signal λ 1 by luminous power percentage size, wherein the large number percent luminous power downlink optical signal λ 1a of transmission is along the parallel WDM wave filter 50 that is incident to of transverse axis, parallel second globe lens 60 that is incident to again after total transmissivity, the light end face that converges to single fiber 70 through it outwards exports user side to, the little number percent luminous power downlink optical signal λ 1b of reflection absorbs to attenuator 100, and the adjacent of attenuator 100 is also provided with an extinction plug 110, for absorbing the unnecessary downlink optical signal λ 1b after attenuator 100 surface reflections.
From the uplink optical signal λ 2 of user side transmitting and the up fault light signal λ 1a 〞 being reflected by user side, by the light end face of single fiber 70, input, and by the second globe lens 60, will converge light and become directional light and be incident to WDM wave filter 50, WDM wave filter 50 on the one hand total reflection uplink optical signal λ 2 to the 2nd TO-CAN encapsulation optical fiber receive modules 90 receives, wherein, up fault light signal λ 1a 〞 is emitted to user side by downlink optical signal λ 1a, and because fault can not normally receive, back reflection produces.The up fault light signal of wave-division multiplexer filter 50 total transmissivity λ 1a 〞 on the other hand, light signal after transmission more parallel light-dividing device 40 total reflection to the TO-CAN encapsulation optical fiber receive modules 80 that are incident to receives, by it, light signal being turned to electric signal exports, according to this output signal, trouble spot network data is analyzed, or else the personnel of needing repairing carry OTDR and make house calls.
Although this single fiber transmitted in both directions assembly has automatic fault detection function, use two globe lenss, its light path is directional light transmission, modular construction is complicated, and may overflow the scope of accepting that encapsulates optical fiber receive module by out of order light signal.In addition, this assembly material cost is high, and technology difficulty is large, and volume is large.
Utility model content
In view of this, the technical problems to be solved in the utility model is to provide a kind of single fiber transmitted in both directions assembly of built-in OTDR function, the failure message in can monitor network transmitting procedure, and simplify and form structure.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that
A single fiber transmitted in both directions assembly for built-in OTDR function, it comprises light-dividing device, WDM wave filter and single fiber, axis light emitting module, the first axis light receiving trap and the second axis light receiving trap; Described axis light emitting module and single fiber are oppositely arranged and form the horizontal optical axis of an optic path, on the horizontal optical axis between this axis light emitting module and single fiber, be provided with successively this light-dividing device and WDM wave filter, described the first axis light receiving trap, the second axis light receiving trap are separately positioned on the both sides of this horizontal optical axis and all perpendicular to this horizontal optical axis, and this first axis light receiving trap receives the light signal being reflected by described light-dividing device, this second axis light receiving trap receives the light signal by described WDM wave filter reflection.
As preferred version, described axis light emitting module adopts simple lens, and light signal is and converges light transmission.
As preferred version, in a side of described the second axis light receiving trap, be provided with and absorb and eliminate redundant optical signal one absorption means.
The technique effect that the utility model reaches is as follows:
1, the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model compared with prior art, has saved two globe lenss, has simplified composition structure, has saved production cost.
2, the failure message of the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model in can monitor network transmitting procedure, detects fault occurrence positions, avoids needing expensive optical time domain reflectometer, saves network cost.
3,, when fault inspecting, do not need to disconnect the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model, faster and more convenient operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of single fiber transmitted in both directions assembly;
Fig. 2 is the structural representation of the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model.
[symbol description]
10 TO-CAN encapsulation light emission components
20 optoisolators
30 first globe lenss
40 light-dividing devices
50 WDM wave filters
60 second globe lenss
70 single fibers
80 the one TO-CAN encapsulation optical fiber receive modules
90 the 2nd TO-CAN encapsulation optical fiber receive modules
100 attenuators
110 extinction plugs
200 axis light emitting modules
201 simple lenses
210 light-dividing devices
220 WDM wave filters
230 single fibers
240 first axis light receiving traps
250 second axis light receiving traps
260 optoisolators
270 absorption means
280 metal bases
281 containing holes
θ 1 pitch angle
Embodiment
Below in conjunction with accompanying drawing and embodiment of the present utility model, the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model is described in further detail.
As shown in Figure 2, the single fiber transmitted in both directions assembly of the built-in OTDR function of the utility model comprises metal base 280, axis light emitting module 200, light-dividing device 210, WDM wave filter 220, single fiber 230, the first axis light receiving trap 240 and the second axis light receiving trap 250, and axis light emitting module 200, light-dividing device 210, WDM wave filter 220, single fiber 230, the first axis light receiving trap 240 and the second axis light receiving trap 250 are all fixed in metal base 280.
Wherein, axis light emitting module 200 and single fiber 230 are oppositely arranged and form the horizontal optical axis of an optic path, on this horizontal optical axis, be provided with successively light-dividing device 210 and WDM wave filter 220, and the pitch angle of light-dividing device 210 is that θ 1 is 42 ° ~ 48 °, and the tiltangleθ 2 of WDM wave filter 220 is 132 ° ~ 138 °.The first axis light receiving trap 240 and the second axis light receiving trap 250 are separately positioned on the upper and lower both sides of this horizontal optical axis and all perpendicular to this horizontal optical axis, wherein, the first axis light receiving trap 240 is right against light-dividing device 210, the second axis light receiving traps 250 and is right against WDM wave filter 220.
Axis light emitting module 200 comprises simple lens 201, and simple lens 201 can converge the light signal in axis light emitting module 200.
For avoiding the transmitting illuminant of the light signal interference axis light emitting module 200 of reverse transfer, therefore be provided with an optoisolator 260 on the horizontal optical axis between axis light emitting module 200 and light-dividing device 210.Therefore the light signal, converging through simple lens 201 is incident to light-dividing device 210 after optoisolator 260.
In a side of the second axis light receiving trap 250, be provided with an absorption means 270 that can absorb and eliminate redundant optical signal, absorption means 270 is right against light-dividing device 210.And on metal base 280, offer a containing hole 281, in containing hole 281, place absorption means 270.Wherein, the angle between the central shaft of absorption means 270 and light-dividing device 210 is 55 ° ~ 65 °.
When axis light emitting module 200 is during to the downlink optical signal λ 1 of user side transmitting, after optoisolator 260, be incident to light-dividing device 210, light-dividing device 210 carries out respectively transmission and reflection by downlink optical signal λ 1 by luminous power percentage size, wherein the large number percent luminous power downlink optical signal λ 1a of transmission is incident to WDM wave filter 220 along described horizontal optical axis, exports user side outside converging to after the light end face of single fiber 230 after WDM wave filter 220 total transmissivities; The little number percent luminous power downlink optical signal λ 1b of reflection has absorption means 270 by its absorption.
From the uplink optical signal λ 2 of described user side transmitting and the up fault light signal λ 2a being reflected by user side, by the light end face of single fiber 230, input, first be incident to WDM wave filter 220, this WDM wave filter 220 on the one hand total reflection uplink optical signal λ 2 to second axis light receiving units 250 receives, the up fault light signal of total transmissivity λ 2a is incident to light-dividing device 210 through reflexing to the first coaxial packaging optical fiber receive module 240 receptions on the other hand, by it, light signal being turned to electric signal exports, according to this output signal, trouble spot network data is analyzed and processed, the personnel of needing repairing do not carry OTDR and make house calls, saved grid maintenance cost.
Wherein, light-dividing device 210 carries out transmission and reflection according to the different luminous power number percent of the Demand Design of actual production.The wavelength of downlink optical signal λ 1 and up fault light signal λ 2a is 1460 ~ 1620nm, and up fault-signal λ 2a is that downlink optical signal λ 1a is emitted to user side, because fault is reflected after can not normally receiving.260 of optoisolators, for isolating upward signal λ 2 and up fault-signal λ 2a, make the transmitting illuminant of axis light emitting module interference-free.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (3)
1. a single fiber transmitted in both directions assembly for built-in OTDR function, is characterized in that, it comprises light-dividing device, WDM wave filter and single fiber, axis light emitting module, the first axis light receiving trap and the second axis light receiving trap; Described axis light emitting module and single fiber are oppositely arranged and form the horizontal optical axis of an optic path, on the horizontal optical axis between this axis light emitting module and single fiber, be provided with successively this light-dividing device and WDM wave filter, described the first axis light receiving trap, the second axis light receiving trap are separately positioned on the both sides of this horizontal optical axis and all perpendicular to this horizontal optical axis, and this first axis light receiving trap receives the light signal being reflected by described light-dividing device, this second axis light receiving trap receives the light signal by described WDM wave filter reflection.
2. the single fiber transmitted in both directions assembly of built-in OTDR function according to claim 1, is characterized in that, described axis light emitting module adopts simple lens, and light signal is and converges light transmission.
3. the single fiber transmitted in both directions assembly of built-in OTDR function according to claim 1, is characterized in that, is provided with the absorption means of an absorption and elimination redundant optical signal in a side of described the second axis light receiving trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590141.4U CN203519885U (en) | 2013-09-24 | 2013-09-24 | Single-fiber two-way transmission assembly with built-in OTDR function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590141.4U CN203519885U (en) | 2013-09-24 | 2013-09-24 | Single-fiber two-way transmission assembly with built-in OTDR function |
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| CN203519885U true CN203519885U (en) | 2014-04-02 |
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| CN201320590141.4U Expired - Lifetime CN203519885U (en) | 2013-09-24 | 2013-09-24 | Single-fiber two-way transmission assembly with built-in OTDR function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166194A (en) * | 2014-05-16 | 2014-11-26 | 青岛海信宽带多媒体技术有限公司 | Two-transmitting one-receiving optical component and assembling method thereof |
| CN112368549A (en) * | 2018-07-27 | 2021-02-12 | 华为技术有限公司 | Optical time domain reflectometer and optical assembly with optical time domain reflection function |
| WO2024031998A1 (en) * | 2022-08-09 | 2024-02-15 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2013
- 2013-09-24 CN CN201320590141.4U patent/CN203519885U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166194A (en) * | 2014-05-16 | 2014-11-26 | 青岛海信宽带多媒体技术有限公司 | Two-transmitting one-receiving optical component and assembling method thereof |
| CN112368549A (en) * | 2018-07-27 | 2021-02-12 | 华为技术有限公司 | Optical time domain reflectometer and optical assembly with optical time domain reflection function |
| WO2024031998A1 (en) * | 2022-08-09 | 2024-02-15 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
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| CX01 | Expiry of patent term |