CN103323923A - Optical assembly for OLT and with function of conducting double-trouble-diagnosing - Google Patents
Optical assembly for OLT and with function of conducting double-trouble-diagnosing Download PDFInfo
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- CN103323923A CN103323923A CN2012100756607A CN201210075660A CN103323923A CN 103323923 A CN103323923 A CN 103323923A CN 2012100756607 A CN2012100756607 A CN 2012100756607A CN 201210075660 A CN201210075660 A CN 201210075660A CN 103323923 A CN103323923 A CN 103323923A
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Abstract
The invention discloses an optical assembly for an OLT and with the function of conducting double-trouble-diagnosing. The optical assembly for the OLT and with the function of conducting double-trouble-diagnosing comprises a horizontal optical axis, a first vertical optical axis, a second vertical optical axis and a third vertical optical axis. A first coaxial light emitting assembly and a single optical fiber are located at the two ends of the horizontal optical axis respectively, a second coaxial light emitting assembly is arranged along the first vertical optical axis, the intersecting position between the first vertical optical axis and the horizontal optical axis is provided with a WDM optical filtering piece, and a first lens and a second lens are arranged between the optical filtering piece and the end face of the single optical fiber. A first coaxial light receiving assembly is arranged along the second vertical optical axis. The intersecting position between the second vertical optical axis and the horizontal optical axis is provided with a first light splitting piece. A second coaxial light receiving assembly is arranged along the third vertical optical axis, and the intersecting position between the third vertical optical axis and the horizontal optical axis is provided with a second light splitting piece. Due to the fact that degree of attenuation, caused by bending of optical fibers, to optical signals with different wave lengths is different, the system can analyze electrical signals of a first diagnosing trouble and a second diagnosing trouble to determine whether the optical fibers are bent or broken.
Description
Technical field
The present invention relates to the optical line terminal (Optical Line Terminal is hereinafter to be referred as OLT) that Optical Access Network is used, relate in particular to a kind of OLT optical assembly with dual diagnosis fault.
Background technology
The optical assembly that is used at present the OLT end comprises: one is used for the single fiber of transmitted in both directions, one light emission component, the light transmit-receive integrated assembly that one optical fiber receive module and a wave-division multiplexer filter (WDM filter) form, be mainly used in realizing an OLT module and a plurality of ONU(Optical Network Unit) bidirectional transfer of information of user side, but do not possess monitor network optical fiber link fault diagnosis functions, in case network path breaks down between OLT and certain ONU, need at first disconnect OLT, access expensive optical time domain reflectometer (Optical Time Domain Reflector, abbreviation OTDR) position of trouble-shooting point, cause the high shortcoming of maintenance of network cost, in order to overcome this shortcoming, existing that OTDR is integrated OLT holds optical assembly in the industry, but this class component only has the position of preliminary judgement fiber failure point, but can not determine whether fault causes because fibre-optical bending still ruptures on earth, because the maintenance cost of two kinds of faults is different, is necessary further to confirm.
Summary of the invention
For overcoming above shortcoming, the invention provides a kind of OLT optical assembly with dual diagnosis fault that can clear and definite optical fiber link failure cause.
For realizing the object of the invention, a kind of OLT optical assembly with dual diagnosis fault of the present invention comprises: a horizontal optical axis, first, second, and third vertical optical axis, and one first axis light emitting module and a single fiber (lay respectively at described horizontal optical axis two ends; One second axis light emitting module is along described the first vertical optical axis setting, and this vertical optical axis and described horizontal optical axis intersection are provided with a WDM optical filter, are provided with first, second lens between this optical filter and the single fiber light end face; One first axis light receiving unit is along described the second vertical optical axis setting, and this vertical optical axis and described horizontal optical axis intersection are provided with one first light splitting piece; One second axis light receiving unit is along described the 3rd vertical optical axis setting, and this vertical optical axis and described horizontal optical axis intersection are provided with one second light splitting piece.
Described the first axis light emitting module is a Distributed Feedback Laser.
Described the second axis light emitting module is a Distributed Feedback Laser or a FP laser instrument.
Described the first axis light receiving unit is an APD or a PIN optical receiver.
Described the second axis light receiving unit is an APD or a PIN optical receiver.
Also comprise an optoisolator, this isolator is between described first, second lens.
Because the OLT optical assembly in the said structure, both be provided be used to the second axis light receiving unit that receives preliminary network diagnosis fault-signal, also be provided with for determining that further fibre-optical bending or fracture cause the second axis light emitting module and the first axis light receiving unit that fault occurs, because fibre-optical bending is different to the attenuation degree of different wave length light signal, system can analyze first and second fault diagnosis electric signal thus, to determine whether optical fiber bending or fracture defect have occured.
Description of drawings
Fig. 1 represents the OLT with dual diagnosis fault of first embodiment of the invention optical assembly light channel structure schematic diagram.
Embodiment
Describe most preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
The OLT optical assembly with dual diagnosis fault as shown in Figure 1 comprises: a horizontal optical axis X, first, second, and third vertical optical axis Y1, Y2, Y3, and one first axis light emitting module 10 and a single fiber 70 lay respectively at horizontal optical axis X two ends; One second axis light emitting module 90 arranges along the first vertical optical axis Y1, and this vertical optical axis and horizontal optical axis X intersection are provided with a WDM optical filter 20, is provided with first, second lens 30,60 between this optical filter and the single fiber 70 smooth end faces; One first axis light receiving unit 80 arranges along the second vertical optical axis Y2, and this vertical optical axis and horizontal optical axis X intersection are provided with one first light splitting piece 40; One second axis light receiving unit 100 arranges along the 3rd vertical optical axis Y3, and this vertical optical axis and horizontal optical axis X intersection are provided with one second light splitting piece 50.Wherein, the first axis light emitting module 10 is a Distributed Feedback Laser, the second axis light emitting module 90 is a Distributed Feedback Laser or a FP laser instrument, first, second axis light emitting module 10,90 both positions can be changed mutually, after the adjustment, WDM optical filter 20 plated films also can change accordingly according to the two-laser emission wavelength.First, second axis light receiving unit 80,100 any one can be an APD optical receiver or a PIN optical receiver.First, second light splitting piece 40,50 splitting ratio separately can arrange its transmissivity and reflectivity by the specific wavelength requirement, as the first light splitting piece 40 be set to reflect 90%, transmission 10% uplink optical signal 1310nm wavelength and 100% transmission other wavelength light signal such as 1490nm; And the second light splitting piece 50 is set to reflect 10%, transmission 90% downlink optical signal 1490nm wavelength and other light signal of 100% transmission such as 1310nm.In order to reduce backlight first, second axis light emitting module 10,90 laser instrument are disturbed, also comprise an optoisolator 110, this isolator is between first, second lens 30,60, between first lens 30 and the first light splitting piece 40.
The OLT optical assembly with dual diagnosis fault of said structure, its principle of work that realizes twice optical-fiber network diagnostic function is as follows: A, when network is normal, emission downlink optical signal λ 1---1490nm forms first through WDM optical filter 20 total transmissivities and converges light the first axis light emitting module 10, this converges light and becomes respectively the first directional light through first lens 30, this directional light forward is by behind the optoisolator 110, behind the first light splitting piece 40 total transmissivities, be incident to the second light splitting piece 50, be incident to again the second packaged lens 60 behind this light splitting piece transmission 90% or other number percent and converge light by the directional light change, converge to the output of the backward ONU end of single fiber 70 smooth end faces.Simultaneously, uplink optical signal λ 3 by ONU end emission---1310nm is become and is incident to the first light splitting piece 40 after up directional light is incident to the second light splitting piece 50 total transmissivities again by the light that converges of the second lens 60 with fiber end face after single fiber 70 inputs, and this light splitting piece reflection 90% or other number percent to the first axis light receiving unit 80 receive and be converted to electric signal output.Realize thus the transmission of the up-downgoing light signal under the proper network state.
B, when network link breaks down, at first, downlink optical signal λ 1 can be reflected in the trouble spot---and 1490nm is along single fiber 70 inputs, to converge light through the second lens 60 becomes directional light and is incident to the second light splitting piece 50 reflections 10% to second axis light receiving unit 100 and receives and turn the output of Fisrt fault diagnosis electric signal, after system receives this fault-signal, substantially determined that fault has occured network, but can't failure judgement whether since fibre-optical bending or fracture cause, therefore need further to determine, because it is different with the attenuation degree of 1310nm light signal that fibre-optical bending is respectively 1490nm to wavelength, need to stop OLT and hold all uplink optical signal λ 3---the link transmission of 1310nm this moment, 1310nm forms second through 20 total reflections of WDM optical filter and converges light with uplink optical signal λ 3---descending fault diagnosis light signal λ 2 of the identical wavelength of 1310nm---by the second axis light emitting module 90 emission one, this converges light and becomes the second directional light through first lens 30, this directional light forward is by behind the optoisolator 110, be incident to the second light splitting piece 50 total transmissivities through 40 transmissions 10% of the first light splitting piece or other number percent, through the second lens 60 directional light is converged to single fiber 70 again and export the trouble spot to, the trouble spot can be with the descending fault diagnosis light signal of this part λ 2---after the 1310nm reflection by single fiber 70 inputs, input becomes directional light by the second lens 60 and is incident to the second light splitting piece 50 total transmissivities, be incident to the first light splitting piece 40 after the transmission, this light splitting piece reflection 90% to first axis light receiving unit 80 receives and turns the output of the second fault diagnosis electric signal again.System can analyze first and second fault diagnosis electric signal thus, to determine whether optical fiber bending or fracture defect have occured.
Claims (6)
1. OLT optical assembly with dual diagnosis fault, it is characterized in that, comprise: a horizontal optical axis X, first, second, and third vertical optical axis (Y1, Y2, Y3), one first axis light emitting module (10) and a single fiber (70) lay respectively at described horizontal optical axis (X) two ends; One second axis light emitting module (90) arranges along described the first vertical optical axis (Y1), this vertical optical axis and described horizontal optical axis (X) intersection are provided with a WDM optical filter (20), are provided with first, second lens (30,60) between this optical filter and single fiber (70) the light end face; One first axis light receiving unit (80) arranges along described the second vertical optical axis (Y2), and this vertical optical axis and described horizontal optical axis (X) intersection are provided with the first light splitting piece (40); One second axis light receiving unit (100) arranges along described the 3rd vertical optical axis (Y3), and this vertical optical axis and described horizontal optical axis (X) intersection are provided with one second light splitting piece (50).
2. the OLT optical assembly with dual diagnosis fault according to claim 1 is characterized in that, described the first axis light emitting module (10) is a Distributed Feedback Laser.
3. the OLT optical assembly with dual diagnosis fault according to claim 2 is characterized in that, described the second axis light emitting module (90) is a Distributed Feedback Laser or a FP laser instrument.
4. the OLT optical assembly with dual diagnosis fault according to claim 3 is characterized in that, described the first axis light receiving unit (80) is an APD or a PIN optical receiver.
5. the OLT optical assembly with dual diagnosis fault according to claim 3 is characterized in that, described the second axis light receiving unit (100) is an APD or a PIN optical receiver.
6. according to claim 4 or 5 described OLT optical assemblies with dual diagnosis fault, it is characterized in that, also comprise an optoisolator (110), this isolator is positioned between described first, second lens (30,60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100756607A CN103323923A (en) | 2012-03-21 | 2012-03-21 | Optical assembly for OLT and with function of conducting double-trouble-diagnosing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100756607A CN103323923A (en) | 2012-03-21 | 2012-03-21 | Optical assembly for OLT and with function of conducting double-trouble-diagnosing |
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| CN103323923A true CN103323923A (en) | 2013-09-25 |
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| CN2012100756607A Pending CN103323923A (en) | 2012-03-21 | 2012-03-21 | Optical assembly for OLT and with function of conducting double-trouble-diagnosing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717585A (en) * | 2016-03-31 | 2016-06-29 | 武汉光迅科技股份有限公司 | Light receiving assembly of tree structure |
| CN108254839A (en) * | 2018-03-16 | 2018-07-06 | 青岛海信宽带多媒体技术有限公司 | Optical assembly |
| CN109581600A (en) * | 2018-12-10 | 2019-04-05 | 青岛海信宽带多媒体技术有限公司 | The assembly method and optical module of a kind of fiber adapter, fiber adapter |
| CN116448282A (en) * | 2023-06-16 | 2023-07-18 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
| CN117631153A (en) * | 2024-01-26 | 2024-03-01 | 四川九州光电子技术有限公司 | CPON device and CPON device assembly method |
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| CN101217319A (en) * | 2008-01-10 | 2008-07-09 | 复旦大学 | A gain controllable two-segment erbium-doped optical fiber amplifier |
| CN201388203Y (en) * | 2009-04-16 | 2010-01-20 | 深圳新飞通光电子技术有限公司 | Single fiber bidirectional light transmitting-and-receiving integral assembly |
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| CN202522740U (en) * | 2012-03-21 | 2012-11-07 | 深圳新飞通光电子技术有限公司 | OLT optical assembly possessing double fault diagnosis function |
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| US6603598B1 (en) * | 1999-09-29 | 2003-08-05 | Corning O.T.I. Inc. | Optical amplifying unit and optical transmission system |
| CN101217319A (en) * | 2008-01-10 | 2008-07-09 | 复旦大学 | A gain controllable two-segment erbium-doped optical fiber amplifier |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717585A (en) * | 2016-03-31 | 2016-06-29 | 武汉光迅科技股份有限公司 | Light receiving assembly of tree structure |
| CN108254839A (en) * | 2018-03-16 | 2018-07-06 | 青岛海信宽带多媒体技术有限公司 | Optical assembly |
| CN109581600A (en) * | 2018-12-10 | 2019-04-05 | 青岛海信宽带多媒体技术有限公司 | The assembly method and optical module of a kind of fiber adapter, fiber adapter |
| CN116448282A (en) * | 2023-06-16 | 2023-07-18 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
| CN116448282B (en) * | 2023-06-16 | 2023-09-01 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
| CN117631153A (en) * | 2024-01-26 | 2024-03-01 | 四川九州光电子技术有限公司 | CPON device and CPON device assembly method |
| CN117631153B (en) * | 2024-01-26 | 2024-04-09 | 四川九州光电子技术有限公司 | CPON device and CPON device assembly method |
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Application publication date: 20130925 |