CN203745693U - Optical assembly with OTDR function - Google Patents

Optical assembly with OTDR function Download PDF

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Publication number
CN203745693U
CN203745693U CN201420109082.9U CN201420109082U CN203745693U CN 203745693 U CN203745693 U CN 203745693U CN 201420109082 U CN201420109082 U CN 201420109082U CN 203745693 U CN203745693 U CN 203745693U
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Prior art keywords
optical
light signal
optical filter
light
laser
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CN201420109082.9U
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Inventor
冯亮
葛召江
谭祖炜
杜先鹏
张传俊
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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Abstract

Provided by the utility model is an optical assembly with an OTDR function. The optical assembly comprises a first laser emitter for emitting a first optical signal with a wavelength of lambda1, a second laser emitter for emitting a third optical signal with a wavelength of lambda3, a first laser receiver for receiving a second optical signal with a wavelength of lambda2 from a fiber, a second laser receiver for receiving a fourth optical signal with a wavelength of lambda4 from the fiber, and a first absorption sheet for absorbing the third signal transmitted through a second optical filter and the third optical signal reflected through the end surface of a connector provided with the fiber. According to the optical assembly, since the first absorption sheet is arranged between the second optical filter and the end surface of the connector provided with the fiber, noise light which arrives at the second laser receiver through diffuse reflection is greatly reduced, and the crosstalk caused to the second laser receiver is substantially reduced.

Description

There is the optical assembly of OTDR function
Technical field
The utility model relates to technical field of optical fiber communication, relates in particular to a kind of optical assembly of the OTDR of having function.
Background technology
In optical fiber telecommunications system, be applied to the optical assembly of GPON/EPON/10G PON network, be all generally transceiver optical assembly, main Types has one one receipts, two receipts, two receipts three classes.But in order to realize some special application, as OTDR, RFOG monitoring etc., likely can use two two light channel structures of receiving this high integration.
The patent No. is the OLT optical assembly that 201210056452.2 utility model application has disclosed a kind of integrated OTDR, as shown in Figure 1.This OLT comprises that with optical assembly the first axis light emitting module 10 and single fiber 70, the first axis light emitting module 10 emission wavelengths are λ 1horizon light signal successively through a WDM optical filter 20, first lens 30, optoisolator 110, the two WDM optical filters 40, light splitting piece 50, the second lens 60 are propagated along horizontal optical axis X, enter single fiber 70; The second axis light emitting module 90, these the second axis light emitting module 90 emission wavelengths are λ 2vertical light signal become after horizon light signal through WDM optical filter 20 reflection, propagate along horizontal optical axis X, after enter single fiber 70; The first axis light receiving unit 80, the wavelength that single fiber 70 sends is λ 3light signal after the 2nd WDM optical filter 40 reflection, enter this first axis light receiving unit 80; The second axis light receiving unit 100, the wavelength that single fiber 70 sends is λ 2the light signal of ` enters this second axis light receiving unit 100 after light splitting piece 50 reflections.
The OLT of this integrated OTDR uses optical assembly due to wavelength X 2and λ 2` is identical, and therefore the second axis light emitting module 90 emission wavelengths are λ 2vertical light signal in optic path process, understand some a large amount of diffuse reflections occur, diffuse and become noise light, these signals that diffuse can cause and crosstalk the second axis light receiving unit 100, have a strong impact on the performance of the second axis light receiving unit 100.
Utility model content
The purpose of this utility model is to provide a kind of optical assembly of the OTDR of having function, the cross-interference issue existing for improving two receipts two luminescence components.
For achieving the above object, this optical assembly with OTDR function, comprising:
The first generating laser is λ for emission wavelength 1the first light signal, described the first light signal through the first optical filter, the second optical filter, the 3rd optical filter transmission laggard enter optical fiber;
The second generating laser is λ for emission wavelength 3the 3rd light signal, described the 3rd light signal is through described the second optical filter reflection, then through described the 3rd optical filter transmission laggard enter optical fiber;
The first laser pickoff is λ for receiving from the wavelength of optical fiber 2the second light signal, described the second light signal enters described the first laser pickoff after described the 3rd optical filter reflection;
The second laser pickoff is λ for receiving from the wavelength of optical fiber 4the 4th light signal, described the 4th light signal is through described the 3rd optical filter, described the second optical filter transmission, then enters described the second laser pickoff after described the first optical filter reflection;
The first absorbing sheet, for absorbing the 3rd light signal reflecting transmitted through the 3rd light signal of described the second optical filter with through the connector ends of installing optical fibres;
Wherein, λ 34.
Further, also comprise the second absorbing sheet, be positioned at described the first optical filter top, parallel with the optical axis of described the first light signal, for absorbing the 3rd light signal that arrives described the second absorbing sheet after diffuse reflection.
Further, also comprise lens, described lens are coaxial with described the first light signal, between described the first optical filter and described the second optical filter, assemble for the light beam to process.
Further, described lens are non-globe lens.
Further, also comprise isolator, described isolator is coaxial with described the first light signal, between described the first generating laser and described the first optical filter, for stopping that described the first light signal enters described the first generating laser after diffuse reflection.
Further, also comprise the 4th optical filter, for described the second light signal is seen through, and stop other light signals to enter described the first laser pickoff.
Further, also comprise the 5th optical filter, for described the 4th light signal being seen through and stoping other light signals to enter described the second laser pickoff.
Further, the transmission end of described the first generating laser is non-spherical lens, and focal length is 7-8mm.
Further, the transmission end of described the second generating laser is non-spherical lens, and focal length is 7-8mm.
The optical assembly of the OTDR of having function of the present utility model is due to the first absorbing sheet being set between the connector end at the second optical filter and installing optical fibres, absorbed by this first absorbing sheet greatly through the 3rd light signal of the second optical filter transmission with through the 3rd light signal of connector ends reflection, therefore greatly reduce the noise light that arrives the second laser pickoff through diffuse reflection, greatly reduced crosstalking that the second laser pickoff is caused.
Brief description of the drawings
Fig. 1 is the optical assembly structural representation in prior art with OTDR function;
Fig. 2 is the optical assembly structural representation with OTDR function of the utility model embodiment;
Fig. 3 is that the oblique angle of ceramic insertion core is towards schematic diagram.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiment.
Fig. 2 is the optical assembly structural representation with OTDR function of the utility model embodiment, please refer to Fig. 2, and this optical assembly with OTDR function, comprising: the first generating laser 1, this first generating laser 1 is λ for emission wavelength 1the coaxial water zero diopter of the first light signal 111, the first light signals 111 for converging, the other end of the first light signal 111 is provided with the connector of installing optical fibres, this connector is ceramic insertion core 5.The first light signal 111 enters ceramic insertion core 5 and enters optical fiber again after the first optical filter 9, the second optical filter 101, the 3rd optical filter 12 transmissions.Ceramic insertion core 5 is single mode ceramic insertion core, and reflection end face is dip plane.
The second generating laser 2, this second generating laser 2 is λ for emission wavelength 3the 3rd light signal 22, the initial propagation direction of the 3rd light signal 22 is vertical with the first light signal 111, and crossing with the first light signal 111, focus place arranges the second optical filter 101, the 3rd light signal 22 becomes the horizon light coaxial with the first light signal 111 after the second optical filter 101 reflections, then enters optical fiber enter ceramic insertion core 5 after the 3rd optical filter transmission after again.
The first laser pickoff 4, this first laser pickoff 4, between the second optical filter 101 and ceramic insertion core 5, is λ for receiving from the wavelength of optical fiber 2the second light signal 44, the second light signal 44 initial propagation direction coaxial with the first light signal 111, vertical with the first light signal 111 after the 3rd optical filter 12 reflection, enter afterwards the first laser pickoff 4.
The second laser pickoff 3, this second laser pickoff 3, between the first generating laser 1 and the second generating laser 2, is λ for receiving from the wavelength of optical fiber 4the 4th light signal 33, the four light signal 33 initial propagation direction coaxial with the first light signal 111, through the 3rd optical filter 12, the second optical filter 101 transmissions, more vertical with the first light signal 111 after the first optical filter 9 reflection, enter afterwards the second laser pickoff 3.Wherein, λ 34.
The first absorbing sheet 11, this first absorbing sheet 11 is for absorbing transmitted through the 3rd light signal 22 of the second optical filter 101 with through the 3rd light signal 22 of the end face reflection of ceramic insertion core 5.
The optical assembly of the OTDR of having function of the present utility model is due to the first absorbing sheet being set between the connector end at the second optical filter and installing optical fibres, absorbed by this first absorbing sheet through the 3rd light signal of the second optical filter transmission with through the 3rd light signal major part of connector ends reflection, greatly reduced the noise light that arrives the second laser pickoff through diffuse reflection, crosstalking that this second laser pickoff is caused has been greatly reduced.
In order to make the optical assembly of OTDR function have the performance of better absorption of noise light, optical assembly of the present utility model also comprises the second absorbing sheet 14.This second absorbing sheet 14 is positioned at the top of the first optical filter 9, parallel with the optical axis of the first light signal 111, arrives the noise light of the second absorbing sheet 14 for absorbing the first light signal 111 after the first optical filter 9 diffuse reflections.Above the first optical filter 9, put the second absorbing sheet 14, can further eliminate the 3rd light signal and arrive the light of this absorbing sheet after diffuse reflection, prevent that the 3rd light signal after diffuse reflection from entering the second laser pickoff along the direction vertical with absorbing sheet.
In order to overcome the shortcoming of long-focus optical channel, ensure luminous power and the sensitivity of assembly, optical assembly of the present utility model also comprises lens 6.These lens 6 are arranged on the axis at the first light signal 111 places, between the first optical filter 9 and the second optical filter 101, for the light beam through lens 6 is assembled, and the focus of the first generating laser 1, the second laser pickoff 3 is mapped on ceramic insertion core 5.Wherein, these lens 6 are non-globe lens.
Because optical assembly of the present utility model only has lens, compare in other optical assemblies and have more than two lens, reduce the degree of coupling of inter-module, reduce the installation accuracy requirement of optical assembly, also reduce the cost of optical assembly.
In order to stop the light echo of the first light signal 111, this optical assembly with OTDR function also comprises an isolator 7, and isolator 7 is arranged between the first generating laser 1 and the first optical filter 9, coaxial with the first light signal.
In order to stop noise light to enter the first laser pickoff 4, the optical assembly of the OTDR of having function of the present utility model also comprises the 4th optical filter 13, the 4th optical filter 13 for make the second light signal 44 transmitted through, and stop other light signals to enter the first laser pickoff 4.
In like manner, in order to stop noise light to enter the second laser pickoff 3, the optical assembly of the OTDR of having function of the present utility model also comprises the 5th optical filter 8.The 5th optical filter 8 for make the 4th light signal 33 transmitted through, and stop other light signals to enter the second laser pickoff 3.
In the present embodiment, the transmission end 15 of the first generating laser 1 for bright dipping be the non-spherical lens that converges light, focal length is 7-8mm, in the present embodiment, optimal selection 7.5mm, is data transmission first passage.Emission wavelength is λ 1the first light signal 111; The transmission end 21 of the second generating laser 2 is also the non-spherical lens that converges light for bright dipping, and focal length is also 7-8mm, and optimal selection 7.5mm is data transmission second channel, and emission wavelength is λ 3the 3rd light signal 22.
Rationally distributed for inter-module, the installation accuracy of reduction assembly, is arranged as 45 degree optical filters by the first optical filter 9, the three optical filters 12, and the second optical filter 101 is arranged as to 135 degree optical filters.
Above-mentioned optical assembly, wavelength is λ 1the light that converges sent by the first generating laser 1, after the 3rd optical filter 12 of the second optical filter 101 and 45 degree of the first optical filter 9 of isolator 7,45 degree, aspheric lens 6,135 degree, enter ceramic insertion core 5.Whole path loss is in 10%.
Wavelength is λ 3the light that converges sent by the second generating laser 2, after the second optical filter 101 reflection of 135 degree, enter after the 3rd optical filter 12 of 45 degree, enter ceramic insertion core 5.In whole path loss 5%.
Wavelength is λ 2light sent through ceramic insertion core 5 by optical fiber, then enter after the 4th optical filter 13 filtering after the 3rd optical filter 12 reflection of 45 degree, enter the first generating laser 4.Whole path loss is in 3%.
Wavelength is λ 4light sent through ceramic insertion core 5 by optical fiber, after the second optical filter 101 of the 3rd optical filter 12,135 degree of 45 degree, lens 6, enter again the first optical filter 9 of 45 degree, after the first optical filter 9 refractions of 45 degree, enter after the 5th optical filter 8 filtering, enter the second laser pickoff 3.In whole path loss 10%.
Fig. 3 is that the oblique angle of ceramic insertion core is towards schematic diagram, with reference to Fig. 3, to overall light path aspect, the second generating laser 2 and the second laser pickoff 3 are structurally done to isolation processing, and make second laser pickoff 3 these receiving ends reflect with the end face 51 that reduces ceramic insertion core 5 crosstalking of causing away from ceramic insertion core 5.Control the end face 51 oblique angle directions of ceramic insertion core 5 simultaneously, make high o'clock of lock pin towards the second generating laser 2.The light sending from the second generating laser 2, after being coupled with ceramic insertion core 5, there is unavoidably considerable part to be reflected, to this light channel structure, reflected light has considerable part to be absorbed by the first absorbing sheet 11, reflects the impact on crosstalking thereby effectively eliminated ceramic insertion core 5.
In sum, the optical assembly of the OTDR of having function of the present utility model is due to the first absorbing sheet being set between the connector end at the second optical filter and installing optical fibres, absorbed by this first absorbing sheet through the 3rd light signal of the second optical filter transmission with through the 3rd light signal of connector ends reflection, simultaneously, optical assembly of the present utility model is also provided with the second absorbing sheet above the first optical filter, further after absorption diffuse reflection, arrive the 3rd light signal of this absorbing sheet, thereby the optical assembly of the OTDR of having function of the present utility model can effectively arrive the noise light of the second laser pickoff through diffuse reflection, crosstalking that this second laser pickoff is caused has been greatly reduced.Meanwhile, the optical assembly of OTDR function of the present utility model only has lens, compares other optical assemblies and has more than two lens, reduces the degree of coupling of inter-module, reduces the installation accuracy requirement of optical assembly.
Finally it should be noted that: above each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of the each embodiment technical scheme of the utility model.

Claims (9)

1. an optical assembly with OTDR function, is characterized in that, comprising:
The first generating laser is λ for emission wavelength 1the first light signal, described the first light signal through the first optical filter, the second optical filter, the 3rd optical filter transmission laggard enter optical fiber;
The second generating laser is λ for emission wavelength 3the 3rd light signal, described the 3rd light signal is through described the second optical filter reflection, then through described the 3rd optical filter transmission laggard enter optical fiber;
The first laser pickoff is λ for receiving from the wavelength of optical fiber 2the second light signal, described the second light signal enters described the first laser pickoff after described the 3rd optical filter reflection;
The second laser pickoff is λ for receiving from the wavelength of optical fiber 4the 4th light signal, described the 4th light signal is through described the 3rd optical filter, described the second optical filter transmission, then enters described the second laser pickoff after described the first optical filter reflection;
The first absorbing sheet, for absorbing the 3rd light signal reflecting transmitted through the 3rd light signal of described the second optical filter with through the connector ends of installing optical fibres;
Wherein, λ 34.
2. the optical assembly with OTDR function according to claim 1, it is characterized in that, also comprise the second absorbing sheet, be positioned at described the first optical filter top, parallel with the optical axis of described the first light signal, for absorbing the 3rd light signal that arrives described the second absorbing sheet after diffuse reflection.
3. the optical assembly with OTDR function according to claim 1, is characterized in that, also comprises lens, and described lens are coaxial with described the first light signal, between described the first optical filter and described the second optical filter, assembles for the light beam to process.
4. the optical assembly with OTDR function according to claim 3, is characterized in that, described lens are non-globe lens.
5. the optical assembly with OTDR function according to claim 1, it is characterized in that, also comprise isolator, described isolator is coaxial with described the first light signal, between described the first generating laser and described the first optical filter, for stopping that described the first light signal enters described the first generating laser after diffuse reflection.
6. the optical assembly with OTDR function according to claim 1, is characterized in that, also comprises the 4th optical filter, for described the second light signal is seen through, and stops other light signals to enter described the first laser pickoff.
7. the optical assembly with OTDR function according to claim 1, is characterized in that, also comprises the 5th optical filter, for described the 4th light signal being seen through and stoping other light signals to enter described the second laser pickoff.
8. the optical assembly with OTDR function according to claim 1, is characterized in that, the transmission end of described the first generating laser is non-spherical lens, and focal length is 7-8mm.
9. the optical assembly with OTDR function according to claim 1, is characterized in that, the transmission end of described the second generating laser is non-spherical lens, and focal length is 7-8mm.
CN201420109082.9U 2014-03-11 2014-03-11 Optical assembly with OTDR function Active CN203745693U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105278036A (en) * 2015-11-13 2016-01-27 青岛海信宽带多媒体技术有限公司 Optical module
WO2016107499A1 (en) * 2015-01-04 2016-07-07 武汉电信器件有限公司 External otdr optical assembly structure
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
WO2019105113A1 (en) * 2017-11-29 2019-06-06 中兴通讯股份有限公司 Optical transceiver
CN110320611A (en) * 2018-03-30 2019-10-11 阿里巴巴集团控股有限公司 Optical module and optical mode block assembly
CN110320612A (en) * 2018-03-30 2019-10-11 阿里巴巴集团控股有限公司 Optical module and optical mode block assembly
WO2021203359A1 (en) * 2020-04-09 2021-10-14 华为技术有限公司 Optical communication device and optical signal processing method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107499A1 (en) * 2015-01-04 2016-07-07 武汉电信器件有限公司 External otdr optical assembly structure
CN105278036A (en) * 2015-11-13 2016-01-27 青岛海信宽带多媒体技术有限公司 Optical module
WO2019105113A1 (en) * 2017-11-29 2019-06-06 中兴通讯股份有限公司 Optical transceiver
CN110320611A (en) * 2018-03-30 2019-10-11 阿里巴巴集团控股有限公司 Optical module and optical mode block assembly
CN110320612A (en) * 2018-03-30 2019-10-11 阿里巴巴集团控股有限公司 Optical module and optical mode block assembly
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
WO2021203359A1 (en) * 2020-04-09 2021-10-14 华为技术有限公司 Optical communication device and optical signal processing method

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