CN202737869U - Light module having fiber link breakpoint detection function - Google Patents
Light module having fiber link breakpoint detection function Download PDFInfo
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- CN202737869U CN202737869U CN 201220363192 CN201220363192U CN202737869U CN 202737869 U CN202737869 U CN 202737869U CN 201220363192 CN201220363192 CN 201220363192 CN 201220363192 U CN201220363192 U CN 201220363192U CN 202737869 U CN202737869 U CN 202737869U
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Abstract
The utility model relates to a light module having a fiber link breakpoint detection function. The light module having the fiber link breakpoint detection function comprises a light line terminal, a light splitter, a laser transceiver and an OTDR (Optical Time Domain Reflectometer) emitter, wherein an fiber interface of the light splitter is connected with the fiber, light splitting ports are connected with the laser transceiver and the OTDR emitter, one end of the OTDR emitter is connected with the light line terminal, the other end of the OTDR emitter is connected with the light splitting ports, and the laser transceiver is used for sending light signals of a first wave length to the fiber and receiving light signals of a second wave length inputted by the fiber and reflection signals reflected in the fiber. The light module having the fiber link breakpoint detection function realizes single-fiber two-way transmission in fiber communication, enables the light module to detect a fiber link breakpoint position and can carry out fiber link breakpoint detection without cutting the fiber off from a system. The light module having the fiber link breakpoint detection function has advantages of low cost and simple operation.
Description
Technical field
The utility model relates to the optical module of technical field of optical fiber communication, particularly a kind of optical module that also can realize the optical fiber link breaking point detection when the Ethernet passive optical network proper communication.
Background technology
In optical fiber telecommunications system, transmission medium optical fiber or the optical cable of light often are layed in countryside or seabed.Optical fiber the problems such as link failure or transmission equipment fault occur unavoidably in transmission course.In order accurately to locate the position that fiber failure point or fracture occur, need to detect with optical time domain reflectometer (OTDR).But optical time domain reflectometer equipment on the market is often expensive, and volume is larger.And when carrying out the fault point analysis, need to be with after optical fiber and the system's disconnection, the light pulse of a specific wavelength of optical time domain reflectometer emission enters in the optical fiber, and the light input optical time domain reflectometer that utilizes fiber links to be reflected back is analyzed and obtained the position, fault point.So just make the communication of light letter be forced to interrupt, cause a lot of inconvenience to the user.
As from the foregoing, be necessary to provide a kind of cheap, simple to operate and do not need optical fiber and system are cut off the optical module that just can carry out the optical fiber link breaking point detection.
The utility model content
The purpose of this utility model has provided a kind of cheap, and is simple to operate and do not need optical fiber and system are cut off the optical module that just can carry out the optical fiber link breaking point detection.
The purpose of this utility model is achieved through the following technical solutions: a kind of optical module, comprise optical splitter, laser transceiver, OTDR reflector and optical line terminal,
Described optical splitter is provided with optical fiber interface and a plurality of light splitting mouth, described optical fiber interface links to each other with optical fiber, described laser transceiver and described OTDR reflector are connected on the light splitting mouth, described optical splitter is used for that the light signal of laser transceiver and the emission of OTDR reflector and light pulse signal are assigned to optical fiber interface and is transferred to optical fiber, and the light signal that optical fiber interface is received is assigned to laser transceiver by the light splitting mouth;
One end of described OTDR reflector is connected with optical line terminal, and the other end is connected with the light splitting mouth of described optical splitter, and described OTDR reflector is used for to optical fiber utilizing emitted light pulse signal, and described light pulse signal runs into the optical fiber link breakpoint and produces reflected signal;
One end of described laser transceiver is connected with optical line terminal, the other end is connected with the light splitting mouth of described optical splitter, described laser transceiver is used for the light signal of emission the first wavelength and receives light signal and the reflected signal of the second wave length of being inputted by optical fiber, the light signal of the second wave length of optical fiber input is used for single fiber bi-directional communication, and reflected signal is used for judging the position of the optical fiber link point of interruption.
Wherein, the optical fiber interface of described optical splitter is SC interface tail optical fiber, and described SC interface tail optical fiber is provided with the SC ring flange, and the optical fiber interface of described optical splitter is connected with optical fiber by described SC ring flange.
Each light splitting mouth of described optical splitter is LC interface tail optical fiber, and described laser transceiver links to each other with the light splitting mouth by LC type fiber adapter.
The light splitting mouth of described optical splitter is two, wherein, a light splitting mouth links to each other with described laser transceiver, another links to each other with described OTDR reflector, and the ratio of the luminous power of described two light splitting mouths is 1:9, described luminous power proportioning is that 90% light splitting mouth links to each other with laser transceiver, and described luminous power proportioning is that 10% light splitting mouth links to each other with the OTDR reflector.
The OTDR reflector is FP type laser, and described FP type laser emission wavelength is 1310nm, and transmission rate is the light signal of 155Mb/s.
Described laser transceiver is PR30 type BOSA.
Described BOSA comprises 10G and 1.25G emission TOSA and 10G and 1.25G reception ROSA.
By above technical scheme as can be known, optical splitter is set in optical module, laser transceiver and OTDR reflector are coupled by the light splitting mouth of optical splitter respectively.Be transferred in the optical fiber after the light pulse signal that optical splitter is launched light signal and the OTDR reflector of laser transceiver emission is coupled to optical fiber interface in proportion, optical splitter also passes through light splitting port transmission corresponding to laser transceiver to laser transceiver with light signal and the reflected signal of optical fiber interface reception simultaneously.Laser transceiver not only can be realized the single fiber bi-directional transmission in the fiber communication, and the reflected signal that receives according to optical module simultaneously can detect the position of the optical fiber link point of interruption.Thereby not needing realizing just can carry out the optical fiber link breaking point detection with optical fiber and system's cut-out.And owing to only in optical module, add optical splitter and OTDR reflector, thus make optical module have the detection that the optical time domain reflectometer function can realize the optical fiber link point of interruption, so the utility model also has advantage cheap, simple to operate.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art.Apparently, the accompanying drawing in below describing only is embodiment more of the present utility model, for those of ordinary skills, can also obtain according to these accompanying drawing illustrated embodiments other embodiment and accompanying drawing thereof.
Fig. 1 shows structural representation of the present utility model;
Fig. 2 shows fibercuts situation in the ethernet passive optical network;
Fig. 3,4 shows the schematic diagram of the signal that the ROSA among the PR30 type BOSA receives in the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Fig. 1 shows structural representation of the present utility model, and as shown in Figure 1, a kind of optical module comprises optical line terminal 1, optical splitter 2, laser transceiver 3 and OTDR(Optical Time Domain Reflectometer, optical time domain reflectometer) reflector 4.Optical splitter 2 is arranged between optical line terminal 1 and the optical fiber.Optical splitter 2 is provided with optical fiber interface and a plurality of light splitting mouth (optical fiber interface and light splitting mouth are not shown in the drawings).In the present embodiment, optical splitter 2 is provided with two light splitting mouths.Laser transceiver 3 and OTDR reflector 4 are arranged in the middle of optical line terminal 1 and the optical splitter, and wherein, an end of laser transceiver 3 is connected with optical line terminal 1, and the other end is connected with a light splitting mouth of optical splitter 2.One end of OTDR reflector 4 is connected with optical line terminal 1, and the other end is connected with another light splitting mouth of optical splitter 2.
Wherein, two light splitting mouths all adopt LC interface tail optical fiber, and the ratio of the luminous power of two light splitting mouths is 1:9, and wherein the luminous power proportioning is that 90% light splitting mouth links to each other by LC type fiber adapter with laser transceiver 3; The luminous power proportioning is that 10% light splitting mouth links to each other by LC type fiber adapter with OTDR reflector 4.The optical fiber interface of optical splitter 2 adopts SC interface tail optical fiber structure, and SC interface tail optical fiber is provided with the SC ring flange, and optical fiber interface namely is connected with optical fiber interface by the SC ring flange.
In the utility model, OTDR reflector 4 is FP type laser, and this FP type laser emission wavelength is 1310nm, and transmission rate is the light pulse signal of 155Mb/s.This light pulse signal runs into breakpoint when transmitting in optical fiber link can produce reflected signal.Laser transceiver 3 adopts PR30 type BOSA(Bidirectional Optical Subassembly Assemble, reversible optical assembly).Wherein, BOSA comprises 10G and 1.25G emission TOSA(Transmitter Optical Subassembly Assemble, light-emitter assembly) and 10G and 1.25G receive ROSA(Receiver Optical Subassembly Assemble, optical receiver assembly).
Now operation principle of the present utility model is described in detail:
When the utility model only is used for the Ethernet passive optical network proper communication, FP type laser in the optical module is not worked, the TOSA of PR30 type BOSA launches the light signal of the first wavelength, and this light signal enters the light splitting mouth of optical splitter 2 and enters optical fiber by optical fiber interface and transmits; Simultaneously enter optical fiber interface and be input to ROSA among the PR30 type BOSA by the light splitting mouth that links to each other with PR30 type BOSA by the light signal of the second wave length of optical fiber input, thus the single fiber bi-directional communication of realization Ethernet passive optical network.
When the utility model was used for not cutting off the Ethernet passive optical network system and can carries out the optical fiber link breaking point detection, the TOSA of the PR30 type BOSA in the optical module and FP type laser were launched respectively the light signal of the first wavelength and a series of light pulse signal to optical splitter 2.Wherein, the light pulse signal wavelength is 1310nm, and transmission rate is 155Mb/s.Optical splitter 2 is transferred to the light signal of the first wavelength of the TOSA emission of PR30 type BOSA and the light pulse signal of FP type laser emission in the optical fiber after being coupled to optical fiber interface for the proportioning of 9:1 by luminous power.When in the optical fiber link breakpoint being arranged, because Rayleigh scattering and Fresnel reflection, light pulse signal is understood some reflected signal and is reflected back optical fiber, and reflected signal is input to the ROSA of PR30 type BOSA with the light signal by the second wave length of optical fiber input by optical splitter 2.The ROSA of PR30 type BOSA converts the light signal of second wave length to single fiber bi-directional communication that the signal of telecommunication is realized Ethernet passive optical network, the ROSA of PR30 type BOSA is with reflected signal process photoelectric conversion simultaneously, form the signal of telecommunication and be input to the breaking point detection module, thereby judge the position of the optical fiber link point of interruption by the breaking point detection module.
The following describes and optical splitter is set with the detailed process of detection fiber link down point position in optical module.
Fig. 2 shows fibercuts situation in the ethernet passive optical network: the optical splitter 2 to ONU1(Optical Network Unit that is applied to the ethernet passive optical network of optical access network, optical network unit) distance between is 1km, distance between the optical splitter 2 to ONU2 is 2km, distance between the optical splitter 2 to ONU3 is 10km, but at the 7km place fibercuts has occured.When using the breaking point detection function of this optical module, OTDR reflector utilizing emitted light pulse signal, the ROSA of PR30 type BOSA receives signal as shown in Figure 3.Can find out from signal shown in Figure 3, apart from the 1km place, detect the Fei Nier reflection peak of ONU1 at the optical line terminal optical module, at the 2km place, detect the Fei Nier reflection peak of ONU2, at the 7km place, detect the Fei Nier reflection peak that fibercuts causes.
The comparison system layout, the signal of normal condition should be: apart from the 1km place, we detect the reflection peak of ONU1 at the optical line terminal optical module, and at the 2km place, we detect the reflection peak of ONU2, at the 10km place, detect the reflection peak of ONU3.Thus, can judge that optical module breakpoint occurred to the circuit between the ONU3, this breakpoint distance light road terminal optical module 7km.
Suppose that after the OTDR reflector sends light pulse signal receive the reflection peak (as shown in Figure 4) of breakpoint at the T2 time point, the distance of distance light road, breakpoint place terminal optical module calculates according to following formula 1 so:
In the formula 1, c=3 * 10
8M/s is the light velocity, and n is the refractive index of fiber core, and the numerical value that d calculates is the distance of breakpoint distance light road terminal optical module.
Therefore the utility model can be realized the optical fiber link breaking point detection in situation about not needing optical fiber and system's cut-out.Because only add the detection that optical splitter 2 and OTDR reflector 4 can be realized the optical fiber link point of interruption in optical module, the utility model also has advantage cheap, simple to operate.
The above is preferred embodiment of the present utility model only, is not be used to limiting protection range of the present utility model.All within spirit of the present utility model and principle, any modification of doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. the optical module with detection fiber link breakpoint function comprises optical splitter, laser transceiver, OTDR reflector and optical line terminal, it is characterized in that,
Described optical splitter is provided with optical fiber interface and a plurality of light splitting mouth, described optical fiber interface links to each other with optical fiber, described laser transceiver and described OTDR reflector are connected on the described light splitting mouth, described optical splitter is used for that the light signal of laser transceiver and the emission of OTDR reflector and light pulse signal are assigned to optical fiber interface and is transferred to optical fiber, and the light signal that optical fiber interface is received is assigned to laser transceiver by described light splitting mouth;
One end of described OTDR reflector is connected with optical line terminal, and the other end is connected with the light splitting mouth of described optical splitter, and described OTDR reflector is used for to optical fiber utilizing emitted light pulse signal, and described light pulse signal runs into the optical fiber link breakpoint and produces reflected signal;
One end of described laser transceiver is connected with optical line terminal, the other end is connected with the light splitting mouth of described optical splitter, described laser transceiver is used for the light signal of emission the first wavelength and receives light signal and the reflected signal of the second wave length of being inputted by optical fiber, the light signal of the second wave length of optical fiber input is used for single fiber bi-directional communication, and reflected signal is used for judging the position of the optical fiber link point of interruption.
2. optical module as claimed in claim 1, wherein, the optical fiber interface of described optical splitter is SC interface tail optical fiber, and described SC interface tail optical fiber is provided with the SC ring flange, and the optical fiber interface of described optical splitter is connected with optical fiber by described SC ring flange.
3. optical module as claimed in claim 1, wherein, each light splitting mouth of described optical splitter is LC interface tail optical fiber, described laser transceiver links to each other with the light splitting mouth by LC type fiber adapter.
4. such as each described optical module in the claims 1 to 3, wherein, the light splitting mouth of described optical splitter is two, wherein, a light splitting mouth links to each other with described laser transceiver, and another links to each other with described OTDR reflector, and the ratio of the luminous power of described two light splitting mouths is 1:9, described luminous power proportioning is that 90% light splitting mouth links to each other with laser transceiver, and described luminous power proportioning is that 10% light splitting mouth links to each other with the OTDR reflector.
5. optical module as claimed in claim 4, wherein, the OTDR reflector is FP type laser, and described FP type laser emission wavelength is 1310nm, and transmission rate is the light signal of 155Mb/s.
6. optical module as claimed in claim 4, wherein, described laser transceiver is PR30 type BOSA.
7. optical module as described in claim 6, wherein, described BOSA comprises that 10G and 1.25G emission TOSA and 10G and 1.25G receive ROSA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220363192 CN202737869U (en) | 2012-07-25 | 2012-07-25 | Light module having fiber link breakpoint detection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220363192 CN202737869U (en) | 2012-07-25 | 2012-07-25 | Light module having fiber link breakpoint detection function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344314A (en) * | 2013-06-15 | 2013-10-09 | 威海北洋电气集团股份有限公司 | M-Z optical fiber vibration sensing system and fiber breakage detection method thereof |
| CN103996347A (en) * | 2014-05-27 | 2014-08-20 | 西安开元电子实业有限公司 | Optical fiber wiring and terminating experiment instrument |
| CN104270192A (en) * | 2014-09-19 | 2015-01-07 | 武汉光谷互连科技有限公司 | Optical fiber fault locator and use method thereof |
| CN106452568A (en) * | 2016-11-03 | 2017-02-22 | 深圳新飞通光电子技术有限公司 | OSC (Optical Supervising Channel) optical module with OTDR (Optical Time Domain Reflectometer)) function and method for realizing real-time and interruption service detection thereof |
| CN106470070A (en) * | 2016-09-28 | 2017-03-01 | 杭州迪普科技股份有限公司 | The method and apparatus of detection Link State |
-
2012
- 2012-07-25 CN CN 201220363192 patent/CN202737869U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344314A (en) * | 2013-06-15 | 2013-10-09 | 威海北洋电气集团股份有限公司 | M-Z optical fiber vibration sensing system and fiber breakage detection method thereof |
| CN103344314B (en) * | 2013-06-15 | 2018-10-26 | 威海北洋光电信息技术股份公司 | M-Z optical fiber vibration sensing systems and its broken fiber detecting method |
| CN103996347A (en) * | 2014-05-27 | 2014-08-20 | 西安开元电子实业有限公司 | Optical fiber wiring and terminating experiment instrument |
| CN103996347B (en) * | 2014-05-27 | 2016-08-17 | 西安开元电子实业有限公司 | A kind of optical fiber distributing termination experiment instrument |
| CN104270192A (en) * | 2014-09-19 | 2015-01-07 | 武汉光谷互连科技有限公司 | Optical fiber fault locator and use method thereof |
| CN106470070A (en) * | 2016-09-28 | 2017-03-01 | 杭州迪普科技股份有限公司 | The method and apparatus of detection Link State |
| CN106470070B (en) * | 2016-09-28 | 2019-02-19 | 杭州迪普科技股份有限公司 | The method and apparatus for detecting link state |
| CN106452568A (en) * | 2016-11-03 | 2017-02-22 | 深圳新飞通光电子技术有限公司 | OSC (Optical Supervising Channel) optical module with OTDR (Optical Time Domain Reflectometer)) function and method for realizing real-time and interruption service detection thereof |
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Granted publication date: 20130213 |