CN102761371A - Optical component with optical time domain reflection function - Google Patents

Optical component with optical time domain reflection function Download PDF

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Publication number
CN102761371A
CN102761371A CN2012102549565A CN201210254956A CN102761371A CN 102761371 A CN102761371 A CN 102761371A CN 2012102549565 A CN2012102549565 A CN 2012102549565A CN 201210254956 A CN201210254956 A CN 201210254956A CN 102761371 A CN102761371 A CN 102761371A
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CN
China
Prior art keywords
optical
filter
time domain
reflection function
photodetector
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Pending
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CN2012102549565A
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Chinese (zh)
Inventor
邹翔
宋琛
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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 CN2012102549565A priority Critical patent/CN102761371A/en
Publication of CN102761371A publication Critical patent/CN102761371A/en
Pending legal-status Critical Current

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Abstract

The invention provides an optical component with an optical time domain reflection function. The component comprises a laser used for emitting uplink light, a photoelectric detector used for receiving downlink light signals, a first optical filter used for reflecting optical time domain signals, a second optical filter used for reflecting optical time domain detection signals, and an optical interface used for being externally connected with optical fiber, wherein the first optical filter is obliquely arranged among the laser, the photoelectric detector and the optical interface; one surface of the first optical filter faces towards the photoelectric detector and the optical interface, and the other surface of the first optical filter faces towards the laser; the second optical filter is positioned between the first optical filter and the photoelectric detector; and one surface of the second optical filter is a curved surface facing towards the first optical filter. According to the invention, as the second optical filter adopts the curved surface structure, both the yield and the reliability of the optical component are improved at a reduced size.

Description

Optical assembly with optical time domain reflection function
Technical field
The present invention relates to technical field of optical fiber communication, particularly relate to a kind of optical assembly with optical time domain reflection function.
Background technology
In recent years, rely on it can be based on FTTx (FTTH, FTTB, the FTTC etc.) broadband network of optical fiber communication, and be able to fast development for the user provide voice, data and Video service at a high speed.But operator is to user's the supervision and the detection and localization of optical network link case point, and contradiction becomes increasingly conspicuous.At present, in the process that the optical network unit (ONU) as user side is detected, mainly be to discern as the optical line terminal (OLT) of local side by the user's data flow, can not carry out accurate in locating and monitoring to the user.And optical time domain reflectometer (OTDR) adopts the method for time domain measurement; Emission has the light pulse of certain wavelength and injects tested optical fiber; Then through the Rayleigh scattering returned in the detection fiber and Fresnel reflection optical signal power distribution curve, can find out the physical characteristic such as length and loss of tested optical fiber along time shaft.Simultaneously, utilize optical time domain reflectometer powerful data analysis function, can also realize accurately location case point in the optical fiber link and fault point; Also can form database for the test of operator's on-line monitoring in the future, be convenient in the maintenance fibre circuit is carried out true of quality and trouble shoot etc.Therefore, utilizing optical time domain reflectometer that detection and location are carried out in fault point in the fibre circuit and user side, is the test mode that generally adopts at present.But, existing user side module, the reflection to the OTDR detection signal of local side on designs does not explicitly call for; Device is unfixing and clear and definite to the reflection of OTDR detection signal; Therefore accidentalia when the different user end depends on device package fully to its OTDR detection signal reflection power, causes most of monitoring and line fault to judge inaccurate; Error is big, situation such as erroneous judgement often occurs and fail to judge.In order to realize that optical communication network system is monitored in real time, need to adopt monitoring of OTDR Time Domain Reflectometry technology and location optical-fiber network breakpoint.For realizing should technology, traditional approach is to utilize traditional optically flat filter to realize the reflection and the transmission of multi-wavelength signals merely.Its shortcoming is that traditional optically flat filter does not converge the ability of light signal.If the filter of reverberation time-domain signal is arranged on the position near optical interface, need take into account the reflection and the perspective of multi-wavelength this moment, cause the plated film complexity sharply to increase.If the filter of reverberation time-domain signal is arranged on the position away from optical interface, the light time territory signal energy of reflected back is with deficiency.
Summary of the invention
The embodiment of the invention provides a kind of optical assembly with optical time domain reflection function; To solve the problem that the optical assembly rate of finished products is low, reliability is low in the prior art; Realize improving the rate of finished products and the reliability of optical assembly, and dwindle the volume of optical assembly with optical time domain reflection function with optical time domain reflection function.
The present invention provides a kind of optical assembly with optical time domain reflection function; Comprise: be used to launch up light laser, be used to receive downlink optical signal photodetector, be used for the reverberation time-domain signal first filter, be used for second filter of reverberation time domain detection signal and the optical interface that is used for external optical fiber; Said first filter is obliquely installed between said laser, said photodetector and said optical interface; One surface of said first filter is towards said photodetector and said optical interface; Another surface of said first filter is towards said laser; Said second filter is between said first filter and said photodetector, and a surface of said second filter is a curved-surface structure, and said curved-surface structure is towards said first filter.
Optical assembly with optical time domain reflection function provided by the invention; Second filter plate through integrated reflection function to light time territory detection signal in optical assembly; And second filter plate be set to curved-surface structure; The curved-surface structure of second filter plate has the ability that converges light time territory detection signal; Can strengthen the energy of light time territory detection signal back light network; Avoided utilizing merely reflection that the filter technology on plane realizes multi-wavelength signals with the transmission problem the problem includes: the problem that plated film is complicated, cost increase, original up and downlink optical signal receive certain influence improved the rate of finished products and the reliability of optical assembly, and dwindled the volume of optical assembly with optical time domain reflection function with optical time domain reflection function.
Aforesaid optical assembly with optical time domain reflection function, the optical axis of said laser and the optical axis of said optical interface are located along the same line, and the angle between the optical axis of said first filter and said laser is 45 degree.
Aforesaid optical assembly with optical time domain reflection function, the optical axis of said photodetector is vertical with the optical axis of said laser.
Aforesaid optical assembly with optical time domain reflection function, said first filter and said second filter are the wavelength division multiplexing filter.
Aforesaid optical assembly with optical time domain reflection function, the subsequent corrosion of said curved-surface structure are 0.5 mm ~ 10mm.
Aforesaid optical assembly with optical time domain reflection function, preferred subsequent corrosion 1.3 mm-3.7mm.
Aforesaid optical assembly with optical time domain reflection function, said second filter is vertical with the optical axis of said photodetector.
Aforesaid optical assembly with optical time domain reflection function, the wavelength of the uplink optical signal of said laser emission is 1260 nm-1360nm; The wavelength of the downlink optical signal that said photodetector receives is 1480 nm-1500nm; The wavelength of territory detection signal of said light time is 1615 nm-1665nm.
Aforesaid optical assembly with optical time domain reflection function also comprises metal-back; Said first filter and said second filter are arranged in the said metal-back, and said laser, said photodetector and said optical interface are installed on the said metal-back.
Aforesaid optical assembly with optical time domain reflection function, said photodetector is fixed on the said metal-back through insulating cement.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 has the structural representation of the optical assembly embodiment of optical time domain reflection function for the present invention;
Fig. 2 has the light path principle figure of the optical assembly embodiment of optical time domain reflection function for the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 1 has the structural representation of the optical assembly embodiment of optical time domain reflection function for the present invention; Fig. 2 has the light path principle figure of the optical assembly embodiment of optical time domain reflection function for the present invention.As depicted in figs. 1 and 2; Present embodiment has the optical assembly of optical time domain reflection function; Comprise: be used to launch up light laser 1, be used to receive downlink optical signal photodetector 2, be used for the reverberation time-domain signal first filter 4, be used for second filter 3 of reverberation time domain detection signal and the optical interface 5 that is used for external optical fiber; First filter 4 is obliquely installed between laser 1, photodetector 2 and optical interface 5; One surface of first filter 4 towards another surfaces of photodetector 2 and optical interface 5, the first filters 4 towards laser 1, the second filter 3 between first filter 4 and photodetector 2; One surface of second filter 3 is a curved-surface structure, and curved-surface structure is towards first filter 4.
Particularly; Present embodiment has first filter 4 in the optical assembly of optical time domain reflection function and has to the complete transmission of up light, to the whole characteristics of reflection of descending light and light time territory detection signal, and light time territory detection signal projects on first filter 4 via optical interface 5, reflexes to second filter 3 through first filter 4; Again reflexed on first filter 4 by second filter 3; Reflexed to optical interface 5 by first filter 4 more at last, and return in the external optical fiber 6, and then get into optical-fiber network through optical interface 5; In the optical line terminal under transferring to, realize detection and localization to this optical network unit.
Wherein, the optical axis of the optical axis of laser 1 and optical interface 5 is located along the same line, and the angle between the optical axis of first filter 4 and laser 1 can be 45 degree.Concrete; Up light through laser 1 emission is injected the surface of first filter 4 with the angle of 45 degree, and its energy incides optical interface 5 after being seen through fully by first filter 4; Optical fiber 6 through being external in optical interface 5 gets into optical-fiber network, and then transfers in the affiliated optical line terminal.Get into the downlink optical signal in the optical assembly that present embodiment has the optical time domain reflection function by optical-fiber network; At first incide the surface of first filter 4; After its energy is reflected by first filter 4 fully, incide the surface of second filter 3, its energy is transmitted into fully by second filter 3 and is mapped in the photodetector 2; To realize the accurate reception of 2 pairs of downlink optical signals of photodetector, realize photoelectric converting function.Preferably, the optical axis of the photodetector in the present embodiment 2 is vertical with the optical axis of laser 1.
In addition, consider the light signal that gets into photoelectric device through optical interface 5 except the downlink optical signal of optical line terminal emission, also having light time territory detection signal and wavelength is the interference lightwave signal of 1550nm-1560nm.Crosstalk in order to reduce; Improve the antijamming capability of photodetector 2; Effectively improve photodetector 2 and receive the sensitivity of downlink optical signals, be arranged on second filter 3 between first filter 4 and the photodetector 2 and have the characteristic that reflects fully to the complete transmission of descending light, to light time territory detection signal and interference lightwave signal.Disturb lightwave signal to be reflected fully, avoid it to be injected in the photodetector 2, to improve the reception conversion accuracy of 2 pairs of downlink optical signals of photodetector on the surface of second filter 3.Second filter 3 is that curved-surface structure forms reflecting curved surface towards the surface of first filter 4, the ability that this reflecting curved surface has reflection and converges.This curved-surface structure is except that the shape of reflecting curved surface, and the design of curved-surface structure shape can be according to the needs change, and the subsequent corrosion of the curved-surface structure in the present embodiment is 0.5 mm ~ 10mm, and is preferred, subsequent corrosion 1.3 mm-3.7mm.And second filter 3 in the present embodiment is vertical with the optical axis of photodetector 2.It is not the restriction to its global shape that present embodiment has second filter 3 that provides in the optical assembly of optical time domain reflection function, adopts other global shapes, as long as have reflecting curved surface, all belongs to protection scope of the present invention.First filter 4 in the present embodiment and second filter, the 3 preferred wavelength division multiplexing filters that adopt; And optical interface 5 has the public input/output end port of the optical assembly of optical time domain reflection function as present embodiment; Can adopt SC plug-type or LC plug-type; Also or in SC/PC tail fiber type or the SC/APC tail fiber type any is to be connected realization single fiber bi-directional transfer function with the light mouth of external network.
Further, the wavelength of the uplink optical signal of 1 emission of the laser in the present embodiment is 1260 nm-1360nm; The wavelength of the downlink optical signal that photodetector 2 receives is 1480 nm-1500nm; The wavelength of light time territory detection signal is 1615 nm-1665nm.Concrete, the uplink optical signal of the 1310nm wavelength of laser 1 emission transmits along horizontal optical axis from left to right; Through first filter 4; After its energy is seen through by first filter 4 fully, get into optical interface 5, by getting into the exterior light network with optical interface 5 external optical fiber 6.Get into the light signal of 1490nm, 1550nm and the 1650nm wavelength of photoelectric device by the exterior light network, incide the surface of first filter 4 through optical interface 5 along horizontal optical axis earlier.The energy of 1490nm wavelength light signal is reflected by first filter 5 fully, is seen through on second filter, 2 surfaces, arriving photodetector 2, realizes reception and conversion to light signal.Second filter 3 all returns the stray light signal beyond the 1490nm wavelength light signal, gets into photodetector 2 to prevent it, improves the isolation to crosstalk signal; The energy reflection that simultaneously 1650nm light time territory is detected number after 4 reflections of first filter, gets into exterior light networks through optical interface 5 to first filter 4.The stray light signal of 1550nm is returned optical-fiber network in the lump with 1650nm light time territory detection signal simultaneously.
Further, the optical assembly that present embodiment has the optical time domain reflection function can also comprise metal-back 8; First filter 4 and second filter 3 are arranged in the metal-back 8, and laser 1, photodetector 2 and optical interface 5 are installed on the metal-back 8.Preferably, the laser in the present embodiment 1 is fixed on the metal-back 8 through insulating cement 7 respectively with photodetector 2.
Present embodiment has the optical assembly of optical time domain reflection function; Second filter plate through integrated reflection function to light time territory detection signal in optical assembly; And second filter plate be set to curved-surface structure; The curved-surface structure of second filter plate has the ability that converges light time territory detection signal; Can strengthen the energy of light time territory detection signal back light network; Avoided utilizing merely reflection that the filter technology on plane realizes multi-wavelength signals with the transmission problem the problem includes: the problem that plated film is complicated, cost increase, original up and downlink optical signal receive certain influence improved the rate of finished products and the reliability of optical assembly, and dwindled the volume of optical assembly with optical time domain reflection function with optical time domain reflection function.Present embodiment has the optical assembly of optical time domain reflection function in the optical network unit single fiber bi-directional photoelectric device each item function that realizes user side; Can effectively realize the reflection function of optical time domain reflectometer with light time domain detection signal; Compare the optical network unit single fiber bi-directional photoelectric device of existing user side; Have accurate, simple to operate, the cheap characteristics of light time territory detection signal reflection, can make local side the optical network unit user of user side realized the fault detection capability of on-line monitoring accurately in real time and optical link.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.

Claims (10)

1. optical assembly with optical time domain reflection function; It is characterized in that; Comprise: be used to launch up light laser, be used to receive downlink optical signal photodetector, be used for the reverberation time-domain signal first filter, be used for second filter of reverberation time domain detection signal and the optical interface that is used for external optical fiber; Said first filter is obliquely installed between said laser, said photodetector and said optical interface; One surface of said first filter is towards said photodetector and said optical interface, and another surface of said first filter is towards said laser, and said second filter is between said first filter and said photodetector; One surface of said second filter is a curved-surface structure, and said curved-surface structure is towards said first filter.
2. the optical assembly with optical time domain reflection function according to claim 1 is characterized in that, the optical axis of said laser and the optical axis of said optical interface are located along the same line, and the angle between the optical axis of said first filter and said laser is 45 degree.
3. the optical assembly with optical time domain reflection function according to claim 2 is characterized in that the optical axis of said photodetector is vertical with the optical axis of said laser.
4. the optical assembly with optical time domain reflection function according to claim 1 is characterized in that, said first filter and said second filter are the wavelength division multiplexing filter.
5. the optical assembly with optical time domain reflection function according to claim 1 is characterized in that, the subsequent corrosion of said curved-surface structure is 0.5 mm ~ 10mm.
6. the optical assembly with optical time domain reflection function according to claim 5 is characterized in that, preferred subsequent corrosion 1.3 mm-3.7mm.
7. the optical assembly with optical time domain reflection function according to claim 1 is characterized in that, said second filter is vertical with the optical axis of said photodetector.
8. the optical assembly with optical time domain reflection function according to claim 1 is characterized in that, the wavelength of the uplink optical signal of said laser emission is 1260 nm-1360nm; The wavelength of the downlink optical signal that said photodetector receives is 1480 nm-1500nm; The wavelength of territory detection signal of said light time is 1615 nm-1665nm.
9. according to the arbitrary described optical assembly of claim 1-8, it is characterized in that, also comprise metal-back with optical time domain reflection function; Said first filter and said second filter are arranged in the said metal-back, and said laser, said photodetector and said optical interface are installed on the said metal-back.
10. the optical assembly with optical time domain reflection function according to claim 5 is characterized in that said photodetector is fixed on the said metal-back through insulating cement.
CN2012102549565A 2012-07-23 2012-07-23 Optical component with optical time domain reflection function Pending CN102761371A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103281151A (en) * 2013-05-24 2013-09-04 青岛海信宽带多媒体技术有限公司 Wavelength division multiplexing-based photoelectric device
CN103338070A (en) * 2013-06-17 2013-10-02 苏州优康网络电子商务有限公司 Reflection function type optical network phototube equipment
CN105247400A (en) * 2013-05-14 2016-01-13 祥茂光电科技股份有限公司 Compact multi-channel optical transceiver module
CN105577268A (en) * 2014-10-17 2016-05-11 中国电信股份有限公司 Optical network equipment, optical module and optical link detection method

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CN102412902A (en) * 2011-11-17 2012-04-11 青岛海信宽带多媒体技术有限公司 Optical network unit photoelectric device with optical time domain reflection function
CN202772894U (en) * 2012-07-23 2013-03-06 青岛海信宽带多媒体技术有限公司 Optical module with optical time domain reflection function

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CN2489347Y (en) * 2001-07-10 2002-05-01 鸿富锦精密工业(深圳)有限公司 Light source package
US7013069B1 (en) * 2004-07-06 2006-03-14 Alliance Fiber Optic Products, Inc. Method and apparatus for separating channel signals
CN102223174A (en) * 2011-05-25 2011-10-19 青岛海信宽带多媒体技术有限公司 Optical module integrated with function of optical time domain reflectometer
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105247400A (en) * 2013-05-14 2016-01-13 祥茂光电科技股份有限公司 Compact multi-channel optical transceiver module
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CN105577268A (en) * 2014-10-17 2016-05-11 中国电信股份有限公司 Optical network equipment, optical module and optical link detection method
CN105577268B (en) * 2014-10-17 2018-07-10 中国电信股份有限公司 Optical network device, optical module and optical link detection method

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