CN102223174B - Optical module integrated with function of optical time domain reflectometer - Google Patents
Optical module integrated with function of optical time domain reflectometer Download PDFInfo
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Abstract
The invention discloses an optical module integrated with the function of an optical time domain reflectometer, comprising a laser for emitting downlink light, and a first photoelectric detector for receiving downlink light, wherein the optical module is also internally provided with a second photoelectric detector and a first filter plate; an antireflection film and a reflection increasing film with the wavelengths corresponding to downlink light are coated on the first filter plate; the first filter plate is obliquely arranged in a frontal optical path of a laser emitting head of the laser, wherein one surface of the first filter plate faces to the laser; the other surface of the first filter plate faces to the second photoelectric detector and the optical fiber; an OTDR detecting light with the same wavelength with the downlink is emitted by the laser; the OTDR detecting light passes by the first filter plate and enters in the optical fiber; and the OTDR detecting light reflected back by the optical fiber is reflected by the first filter plate and enters in the second photoelectric detector. By adopting the optical module, the PON system does not need the traditional optical time domain reflectometer during the breakpoint analysis process, thus reducing maintenance cost of the system and facilitating the maintenance operation.
Description
Technical field
The invention belongs to technical field of optical fiber communication, specifically, relate to a kind of optical module that is applied to optical access network.
Background technology
In optical fiber telecommunications system, the transmission medium of light---optical fiber/optical cable is often laid on countryside or seabed, occurs unavoidably the problems such as link failure or transmission equipment fault.In order can accurately locating, to break down or the position of breakpoint, conventionally to adopt at present special optical time domain reflectometer (OTDR) to carry out detection and location.
OTDR, is then received at OTDR port the information of returning and analyzes by utilizing emitted light pulse in optical fiber.When light pulse is transmitted in optical fiber, can produce scattering and reflection due to character, connector, junction point, bending or other similar event of optical fiber itself, wherein a part of scattering and reflected light signal will turn back in OTDR, the useful information returning is measured by the detector of OTDR, as the time on diverse location in optical fiber or curve segment.OTDR characterizes the characteristic of optical fiber with Rayleigh scattering and Fresnel reflection.Rayleigh scattering forms because light signal produces irregular scattering along optical fiber, and OTDR just measures a part of scattered light that turns back to OTDR port.Decay (loss/distance) degree of these backscatter signals with regard to having shown to be caused by optical fiber.Fresnel reflection is discrete reflection, and its indivedual point in whole piece optical fiber causes, these are comprised of the factor that causes reverse parameter to change.On these aspects, have very strong back-scattering light and be reflected back.Therefore, OTDR utilizes the information of Fresnel reflection be located by connecting point, fibre-optic terminus or breakpoint.
Conventional OTDR equipment price is expensive, and volume is larger, when carrying out breakpoint analysis, optical fiber and system need to be disconnected, the light pulse of then launching a specific wavelength by OTDR enters in optical fiber, utilize the light signal that optical fiber link reflects to be input to OTDR port, then analyze, and then orient the position of fault or breakpoint.
Summary of the invention
The object of the present invention is to provide a kind of optical module that is integrated with optical time domain reflectometer function, can realize the function of OTDR, compare the prior art that tradition adopts special optical time domain reflectometer to carry out optical fiber link fault detect, there is simple to operate, cheap feature.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Be integrated with an optical module for optical time domain reflectometer function, comprise for launching the laser of descending light and for receiving the first photodetector of up light; Wherein, in described optical module, be also provided with the second photodetector and the first filter, on described the first filter, be coated with the anti-reflection film of descending light institute corresponding wavelength and increase anti-film, the transmissivity of described anti-reflection film is A, the reflectivity that increases anti-film is B, and A > B, A+B=1; Described the first filter is tilted to be laid in the place ahead light path of laser beam emitting head of laser, wherein one facing to laser, and another side is towards the second photodetector and optical fiber; Carrying out breakpoint when test, by described laser transmitting, survey light with the OTDR of descending smooth co-wavelength, through the first filter, inject optical fiber, the OTDR returning by fiber reflection surveys light after the first filter reflection, the second photodetector described in directive.
Further, the preferred value between 70% to 90% of described A; Described B is value between 10% to 30% preferably.
For fear of the light signal of other wavelength, inject the second photodetector, between described the first filter and the second photodetector, be also provided with the 3rd filter, on described the 3rd filter, be coated with the anti-reflection film that OTDR surveys light institute corresponding wavelength, the OTDR returning by fiber reflection surveys light after the first filter reflection, the 3rd filter described in directive, and inject the second described photodetector through the 3rd filter.
Preferably, the described OTDR returning by fiber reflection surveys light after the first filter reflection, vertically injects the 3rd described filter, and vertically injects the second described photodetector through described the 3rd filter.
Further, the acute angle of the emission of light angle of described the first filter and laser is 45 °, the descending light of launching by laser or OTDR survey light and inject the first described filter with acute angle angle at 45 °, can realize reverberation thus and incident light angle is just in 90 °; So described the second photodetector is laid in to a side of laser, and the axis direction of the light-receiving head of the axis direction of the laser beam emitting head of laser and the second photodetector is perpendicular, just can realizes thus by the OTDR detection light after the first filter reflection and can vertically inject the second described photodetector.
Further, in described optical module, be also provided with processor, connect the second described photodetector, receive the signal of telecommunication of the second photodetector conversion output, and then calculate the position of each reflection peak, by the positional information of each connector configuring in the position of each reflection peak and system is compared, judge the breakpoint location in optical fiber link.
In order to make optical module can accurately receive up light, in the light path of the place ahead of described the first filter, also tilt to be laid with the second filter, described the second filter wherein one facing to the first filter, another side is towards the first photodetector and optical fiber; On described the second filter, be coated with the anti-reflection film of descending light institute corresponding wavelength and the anti-film of increasing of up light institute corresponding wavelength, the light of launching by laser sees through first filter directive the second filter, and injects optical fiber through the second filter; The up light returning by optical fiber, when directive the second filter, reflexes in the first described photodetector through the second filter.
In order to isolate the light signal of other wavelength, inject the first photodetector, between described the second filter and the first photodetector, be also provided with the 4th filter, on described the 4th filter, be coated with the anti-reflection film of up light institute corresponding wavelength, the up light returning by optical fiber is after the second filter reflection, the 4th filter described in directive, and inject the first described photodetector through the 4th filter.
Further, in order to facilitate the topology layout of optical module, described the second filter is 45 ° with seeing through the descending light of the first filter or acute angle that OTDR surveys light angle, the descending light transmiting by the first filter or OTDR survey light and inject the second described filter with acute angle angle at 45 °, can realize reverberation thus and incident light angle is just in 90 °; Described the first photodetector is laid in to a side of laser, and the axis direction of the light-receiving head of the axis direction of the laser beam emitting head of laser and the first photodetector is perpendicular, the up light returning by optical fiber is like this when injecting the second filter, and its reverberation can vertically be injected described the first photodetector.
In order to reduce the volume of optical module as far as possible, preferably by the first described photodetector and the second photodetector, divide the both sides that are located at laser, to facilitate topology layout.
Compared with prior art, advantage of the present invention and good effect are: the present invention, by multiplexing descending light, uses descending light wavelength to survey light as OTDR, thereby need not additionally increase a seed light source, has reduced hardware cost.By built-in in optical module, for receiving the OTDR that optical fiber reflects, survey the receiving element of light, and then according to the reverberation judgement breakpoint location receiving, realized thus OTDR function, completed the detection of light signal and breakpoint analysis task.The present invention is by the function of Integrated Light time-domain reflectomer in optical module, thereby can be so that PON system no longer needs to use traditional dedicated optical time-domain reflectomer in breakpoint analysis process, not only can reduce thus the maintenance cost of system, but also there is simple to operate, the significant advantage such as integrated level is high, easy maintenance.
Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Accompanying drawing explanation
Fig. 1 is the light path schematic diagram of interior optics of a kind of embodiment of the proposed by the invention optical module that is integrated with optical time domain reflectometer function;
Fig. 2 is the structural representation of optical device of a kind of embodiment of the proposed by the invention optical module that is integrated with optical time domain reflectometer function;
Fig. 3 is the longitudinal sectional view of optical module shown in Fig. 2;
Fig. 4 is a kind of typical PON connected mode schematic diagram;
Fig. 5 is the signal waveforms recording at the second photodetector end while adopting the proposed by the invention optical module that is integrated with optical time domain reflectometer function to carry out breaking point detection.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
PON is the abbreviation of Passive Optical Network, i.e. EPON.PON technology is a kind of typical point-to-multipoint access technology, optical line terminal (OLT) optical module of local side, optical network unit (ONU) optical module and the Optical Distribution Network (ODN) of user side, consists of.In a PON system, generally only comprise an optical line terminal (OLT) optical module, be installed in console for centralized control, launch descending light and be divided into after multipath light signal by ODN, by optical fiber, transfer to respectively in optical network unit ONU s optical modules at different levels.Described optical network unit ONU optical module is installed on customer site, and a customer site need to be installed an ONU optical module, receives the descending light that OLT optical module sends, and returns up light to OLT optical module.
The present invention is in optical module during Integrated Light time-domain reflectomer function, if consider integrated this function in ONU optical module, owing to can not predicting in advance the breakpoint location in light path, therefore need to be in each ONU optical module integrated OTDR functional circuit, can cause thus the significantly rising of system hardware cost, and practicality is poor.Based on this, the present invention is integrated OTDR function in OLT optical module preferably, light pulse by the specific wavelength of laser transmitting in OLT optical module enters optical fiber, utilizes the light that optical fiber link reflects to be input to the OTDR functional circuit in OLT optical module, carries out breakpoint analysis.Like this, for a PON system, only need carry out architecture advances to an OLT optical module, can realize the fault detection capability to whole system optical fiber link.
The Integrated Light time-domain reflectomer function in OLT optical module of take is below example, has concrete structure design and the operation principle thereof of the optical module of OTDR function by a specific embodiment described in elaborating.
Embodiment mono-, as the optical line terminal OLT optical module of a typical Optical Access Network, is that EPON OLT or GPON OLT have used the descending light that wavelength is 1490nm, for 10GPON OLT, uses the descending light that wavelength is 1577nm.The present embodiment dexterously the laser of multiplexing OLT optical module as the transmitting illuminant of OTDR function, transmitting is surveyed light with the OTDR of the identical wavelength of descending light, for breakpoint test, so only need increase in the inside of OLT optical module the light signal receiving element of the descending light of a set of OLT optical module institute corresponding wavelength, just can carry out the catoptrical detection of OTDR, and the light signal that detects is converted to the signal of telecommunication exports to processor, carry out data analysis, and then find out breakpoint location, realize fault location.
The descending light of 1490nm wavelength of take is the explanation of example specific explanations: for the optical module of the present embodiment, what " descending light " and " OTDR surveys light " utilized is all the light of 1490nm, but both effects are different, during difference, works.When optical module is normally worked, the light of the 1490nm of laser transmitting is called " descending light ", by OLT optical module, is transmitted into ONU optical module; When carrying out breaking point detection, this light the present embodiment is called " OTDR surveys light ", because the effect in this time has not been descending.
Shown in Figure 1, the OLT optical module of the present embodiment comprise laser for launching descending light, for receive the up light of ONU optical module transmitting the first photodetector, for receive OTDR that optical fiber reflects survey light the second photodetector and for the OTDR reflecting described in changing survey light transmission path, make the first filter F1 of its directive the second photodetector.Described the first filter F1 is special Thin Film Filter, can adopt the mode of plating anti-reflection film or increasing anti-film on thin transparent film (such as sheet glass) to be made.On the first filter F1 of the present embodiment, be coated with the anti-reflection film of descending light institute corresponding wavelength and increase anti-film, such as the anti-reflection film of 1490nm with increase anti-film, can be plated in any one side of thin transparent film or separately be plated on two sides.In order to meet the Transmission Design requirement of descending light, suppose that the transmissivity of the anti-reflection film that crosses is A on thin transparent film, the reflectivity that increases anti-film is B, should meet the condition of A > B and A+B=1.Wherein, the preferred value in 70% to 90% scope of described A; Described B is value in 10% to 30% scope preferably.As a kind of preferred design, it is that the 1490nm that 80% 1490nm anti-reflection film and reflectivity are 20% increases anti-film that the present embodiment preferably crosses attached transmissivity on thin transparent film.Described the first filter F1 is tilted to be laid in the place ahead light path of laser beam emitting head of laser (it is the place ahead that definition laser is launched descending direction of light), suppose that the b of the first filter F1 is facing to laser, a is facing to optical fiber and the second photodetector, as shown in Figure 1, when OLT optical module is normally worked, the descending light of launching by laser can see through the first filter F1 with lower loss and enter optical fiber, and then transfers to ONU optical module.And when OLT optical module carries out breakpoint test, the OTDR of the 1490nm launching by laser surveys light can enter optical fiber through the first filter F1 with lower loss equally, and in transmitting procedure, run into discontinuous local time and reflect, by optical fiber, return to OLT optical module.The OTDR returning by fiber reflection surveys light when arriving a face of the first filter F1, can under the reflex that increases anti-film, change its original transmission path, then the second photodetector described in directive, and then realize the second photodetector and OTDR is surveyed to effective reception of light.Because the second photodetector is laid in a side of the first filter a face, therefore, the light that reflection occurs by b face can not be injected in the second photodetector, can guarantee thus the accuracy of breakpoint test.
In order to realize the accurate reception of the first photodetector to up light, the present embodiment is also provided with the second filter F2 in the place ahead light path of the first filter F1, for reflecting up light to the first described photodetector, as shown in Figure 1.Described the second filter F2 is also a kind of special Thin Film Filter, can adopt equally the mode at thin transparent film (such as sheet glass) the upper plating anti-film of attached increasing or anti-reflection film to be made.In the present embodiment, in order to ensure optical module, can normally work and realize the first photodetector effectively receives up light ground, on described the second filter F2, be coated with the anti-film of increasing of up light institute corresponding wavelength and the anti-reflection film of descending light institute corresponding wavelength, such as the anti-film of increasing of 1310nm and the anti-reflection film of 1490nm.Described anti-reflection film and the anti-film of increasing can be plated in any one side of thin transparent film or separately be plated on two sides, and its transmissivity and reflectivity are preferably more than 98%.The second filter F2 is tilted to be laid in the place ahead light path of the first filter F1, suppose that b is facing to the first filter F1, a is facing to the first photodetector and optical fiber.
When optical module is normally worked, the light signal of the descending 1490nm launching by laser sees through two filter F1, F2 and enters optical fiber, and can not seal in the first photodetector that receives 1310nm light signal and the second photodetector that receives 1490nm light signal.The up light of the 1310nm returning by optical fiber is on being injected into the second filter F2 time, reflect, and then inject the first photodetector of 1310nm, and can not seal in the second photodetector of 1490nm, guaranteed thus the accurate transmission of light signal between OLT optical module and ONU optical module.When system breaks down need to use OTDR function time, by the light pulse of the 1490nm wavelength of laser transmitting in OLT optical module, OTDR surveys light, by light path, injects optical fiber.The light signal of the 1490nm that optical fiber link breakpoint reflects due to Rayleigh scattering and Fresnel reflection, see through second filter F2 directive the first filter F1, and then reflect on the first filter F1, inject the second photodetector of 1490nm, carry out, after photoelectric conversion, useful signal being exported to processor, such as DSP process chip, thereby carry out accident analysis, realize fault point locating.
In order further to reduce and to crosstalk, improve the Receiver Precision of first, second photodetector to required wavelength light signal, two filter plate F3, F4 need to be further set in optical module, as shown in Figure 1.Wherein, the 3rd filter F3 is laid between a face and the second photodetector of the first filter F1, and on it, is coated with the anti-reflection film that OTDR surveys light institute corresponding wavelength, such as the anti-reflection film of 1490nm.Preferably make the axis direction of the 3rd plane at filter F3 place and the light-receiving head of the second photodetector perpendicular, Reasonable Arrangement the 3rd filter F 3 and the installation site of the second photodetector in optical module, make the light signal of the 1490nm that a face by the first filter F1 reflects can vertical sand shooting to the 3rd filter F3, and see through the 3rd filter F3 and vertically inject the second photodetector.Thus, can further shield the light signal of other wavelength, avoid it to inject the second photodetector, to improve accuracy of detection.In like manner, the 4th filter F4 is laid between a face and the first photodetector of the second filter F2, and is coated with the anti-reflection film of up light institute corresponding wavelength thereon, such as the anti-reflection film of 1310nm.By Reasonable Arrangement the 4th filter F4 and the installation site of the first photodetector in optical module, can make the light signal of the up 1310nm that a face by the second filter F2 reflects can vertical sand shooting to the 4th filter F4, and see through the 4th filter F4 and vertically inject the first photodetector, the accurate reception of ONU optical module being sent out light up to realize OLT optical module.
In order to facilitate the structural design of optical module inside, when tilting to lay described first, second filter F1, F2, preferably the acute angle of the transmission light path angle of the descending light of itself and laser transmitting is designed to 45 °, be angle α=45 ° in Fig. 1, that is to say, the descending light of launching by laser or OTDR survey light and inject the first described filter F1 with the angle of 45 °, and the descending light transmiting by the first filter F1 or OTDR detection light are also injected the second described filter F2 with the angle of 45 °.So, if being launched to descending direction of light, laser is defined as the place ahead, first, second photodetector and the 3rd, the 4th filter F3, F4 can parallelly be laid in a side of the transmission light path of described descending light, can be laid in left side or the right side of laser, and the axis direction of its light-receiving head is perpendicular to the axis direction of the laser beam emitting head of laser.Thus one, by the up light after a face reflection of first, second filter F1, F2, survey light with OTDR and can vertically inject first, second described photodetector.Because the size of photodetector is larger, if first, second photodetector is arranged on to the same side of laser, must design the optical module of large-size, to hold above-mentioned optics.In order to reduce the volume of optical module as far as possible, the present embodiment preferably divides by the first photodetector and the second photodetector the both sides that are located at laser, be the left and right sides of transmission light path of the descending light of described laser transmitting, as shown in Figure 1, to facilitate the integral structure layout of optical module.
Fig. 2, Fig. 3 are the structure chart of the optical device of described optical module, and wherein, first, second, third, fourth filter 5-8 is installed on the inside of round and square tube body 4 in optical module, specifically can be fixed in the inner carriage of round and square tube body 4, shown in Figure 3.On three sides of round and square tube body 4 outsides, be provided with TO (Transistor-Outline, column type encapsulation body), be respectively used to described laser 1, the first photodetector 2 and the second photodetector 3 are installed, shown in Figure 2.Particular location relation between each parts should meet the light transmission requirement shown in Fig. 1.Described laser 1 connects laser driver, and described the first photodetector 2 connects limiting amplifier, and described the second photodetector 3 connects DSP process chip.
Fig. 4 is a kind of typical PON system connected mode, and for the purpose of simplifying the description, it is example that the present embodiment be take the PON system that adopts 1 OLT optical module and 3 ONU optical modules to set up, and the breaking point detection process of the optical module of the described OTDR of being integrated with function is set forth.
In Fig. 4, suppose that OLT optical module connects optical splitter by the long optical fiber of one section of 10km, by optical splitter, descending light is divided into behind three tunnels, transfer to respectively three ONU optical module ONU1, ONU2, ONU3.Wherein, from optical splitter, to the distance ONU1 optical module, be 1km; From optical splitter, to the distance ONU2 optical module, be 2km; From optical splitter, to the distance ONU3 optical module, be 10km.There is fracture in the 7km place of supposing optical fiber between optical splitter and ONU3 optical module.While utilizing the optical module that is integrated with OTDR function that the present embodiment proposes to carry out the detection of optical fiber link, first the light pulse (being that OTDR surveys light) by a setting wavelength of OLT optical module transmitting enters optical fiber, then by the second photodetector in OLT optical module, can detect signal waveform as shown in Figure 5.
As shown in Figure 5, once because light signal runs into discontinuous place in transmitting procedure, in the local time of such as connector or breakpoint etc., can there is Fresnel reflection.Therefore, apart from 10km place, due to the existence of optical splitter, descending light can reflect at optical splitter place, and therefore, the second photodetector in OLT optical module can detect at 10km place a Fresnel reflecting peak; At 11km place, can detect the reflection peak of ONU1 optical module; At 12km place, can detect the reflection peak of ONU2 optical module; At 17km place, can detect the reflection peak that fibercuts causes.
The method that breakpoint is measured: comparison system layout, can learn that breakpoint has occurred at ONU 3 optical module places, the ONU3 place in Fig. 5 is abnormity point.Suppose the T after the pulse of OLT optical module utilizing emitted light
2time receives the reflection peak of ONU3, and breakpoint place apart from the distance of OLT optical module is so:
Wherein, c=3 * 10
8m/s is the light velocity; N is the refractive index of fiber core; D is breakpoint apart from the distance of OLT optical module.
Owing to storing the positional information of each connector in OLT optical module, such as the positional information of optical splitter and each ONU optical module etc., therefore, DSP process chip in OLT optical module is after calculating the distance of each reflection peak apart from OLT optical module, can go out breakpoint location according to the positional information automatic decision of each connector, offer attendant, simple to operate, safeguard easily.
The present embodiment is for simplifying system, and the descending light of multiplexing OLT optical module, as the transmitting illuminant of OTDR function, completes the breakpoint detection mission of OTDR.Certainly, the laser of also can specialized designs launching other wavelength light signals is exclusively used in the breakpoint detection process of OTDR, and still, this design obviously can be brought the rising of hardware cost, therefore, and not as preferred design.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (9)
1. be integrated with an optical module for optical time domain reflectometer function, comprise for launching the laser of descending light and for receiving the first photodetector of up light; It is characterized in that: in described optical module, be also provided with the second photodetector and the first filter, on described the first filter, be coated with the anti-reflection film of descending light institute corresponding wavelength and increase anti-film, the transmissivity of described anti-reflection film is A, the reflectivity that increases anti-film is B, and A>B, A+B=1; Described the first filter is tilted to be laid in the place ahead light path of laser beam emitting head of laser, wherein one facing to laser, and another side is towards the second photodetector and optical fiber; In the light path of the place ahead of described the first filter, also tilt to be laid with the second filter, described the second filter wherein one facing to the first filter, another side is towards the first photodetector and optical fiber; On described the second filter, be coated with the anti-reflection film of descending light institute corresponding wavelength and the anti-film of increasing of up light institute corresponding wavelength, the light of launching by laser sees through first filter directive the second filter, and injects optical fiber through the second filter; The up light returning by optical fiber, when directive the second filter, reflexes in the first described photodetector through the second filter; When carrying out breakpoint test, by described laser transmitting, survey light with the OTDR of descending smooth co-wavelength, through the first filter and the second filter, inject optical fiber, the OTDR returning by fiber reflection surveys light transmission second filter directive the first filter, after the first filter reflection, the second photodetector described in directive.
2. optical module according to claim 1, is characterized in that: described A is value between 70% to 90%; Described B is value between 10% to 30%.
3. optical module according to claim 1, it is characterized in that: between described the first filter and the second photodetector, be also provided with the 3rd filter, on described the 3rd filter, be coated with the anti-reflection film that OTDR surveys light institute corresponding wavelength, the OTDR returning by fiber reflection surveys light after the first filter reflection, the 3rd filter described in directive, and inject the second described photodetector through the 3rd filter.
4. optical module according to claim 3, it is characterized in that: the described OTDR returning by fiber reflection surveys light after the first filter reflection, vertically inject the 3rd described filter, and vertically inject the second described photodetector through described the 3rd filter.
5. according to the optical module described in any one in claim 1 to 4, it is characterized in that: the acute angle of the emission of light angle of described the first filter and laser is 45 °; Described the second photodetector is laid in a side of laser, and the axis direction of the light-receiving head of the axis direction of the laser beam emitting head of laser and the second photodetector is perpendicular.
6. according to the optical module described in any one in claim 1 to 4, it is characterized in that: in described optical module, be also provided with processor, connect the second described photodetector, receive the signal of telecommunication of the second photodetector conversion output, and then calculate the position of each reflection peak, by the positional information of each connector configuring in the position of each reflection peak and system is compared, judge the breakpoint location in optical fiber link.
7. according to the optical module described in any one in claim 1 to 4, it is characterized in that: between described the second filter and the first photodetector, be also provided with the 4th filter, on described the 4th filter, be coated with the anti-reflection film of up light institute corresponding wavelength, the up light returning by optical fiber is after the second filter reflection, the 4th filter described in directive, and inject the first described photodetector through the 4th filter.
8. according to the optical module described in any one in claim 1 to 4, it is characterized in that: described the second filter is 45 ° with the acute angle that sees through the descending light angle of the first filter; Described the first photodetector is laid in a side of laser, and the axis direction of the light-receiving head of the axis direction of the laser beam emitting head of laser and the first photodetector is perpendicular.
9. optical module according to claim 8, is characterized in that: described the first photodetector and the second photodetector divide the both sides that are located at laser.
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Families Citing this family (12)
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|---|---|---|---|---|
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| CN102761371A (en) * | 2012-07-23 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical component with optical time domain reflection function |
| CN102937734B (en) * | 2012-10-25 | 2015-11-18 | 青岛海信宽带多媒体技术有限公司 | There is the optical network unit three-dimensional optical assembly of optical time domain signal reflex function |
| CN103023564A (en) * | 2013-01-10 | 2013-04-03 | 苏州恒知传感科技有限公司 | Optical fiber routing indicator and method for manufacturing same |
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| CN105991185A (en) * | 2015-02-12 | 2016-10-05 | 中兴通讯股份有限公司 | Laser chip |
| CN108155934A (en) * | 2017-12-22 | 2018-06-12 | 武汉光迅科技股份有限公司 | A kind of OLT ends optical transceiver module and method with time domain reflection function |
| CN109525309A (en) * | 2018-11-27 | 2019-03-26 | 武汉光迅科技股份有限公司 | A kind of OTDR combination unit |
| CN110057465A (en) * | 2019-01-31 | 2019-07-26 | 西安和其光电科技股份有限公司 | Optical module and photoelectricity demodulation module for fluorescence optical fiber temperature control system |
| US11112231B2 (en) * | 2019-11-01 | 2021-09-07 | Applied Materials, Inc. | Integrated reflectometer or ellipsometer |
| CN114791651B (en) * | 2021-01-25 | 2023-08-04 | 讯芸电子科技(中山)有限公司 | Transistor outline package optical transceiver |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330265A (en) * | 2000-06-27 | 2002-01-09 | 华为技术有限公司 | Optical module for light-time domain reflectometer with wide dynamic range |
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN201243288Y (en) * | 2008-08-04 | 2009-05-20 | 青岛海信宽带多媒体技术股份有限公司 | Monitoring module and optical module with the same |
-
2011
- 2011-05-25 CN CN201110136096.0A patent/CN102223174B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330265A (en) * | 2000-06-27 | 2002-01-09 | 华为技术有限公司 | Optical module for light-time domain reflectometer with wide dynamic range |
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN201243288Y (en) * | 2008-08-04 | 2009-05-20 | 青岛海信宽带多媒体技术股份有限公司 | Monitoring module and optical module with the same |
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