CN202453549U - Optical line terminal (OLT) light assembly integrated with optical time domain reflector (OTDR) - Google Patents
Optical line terminal (OLT) light assembly integrated with optical time domain reflector (OTDR) Download PDFInfo
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- CN202453549U CN202453549U CN2012200800658U CN201220080065U CN202453549U CN 202453549 U CN202453549 U CN 202453549U CN 2012200800658 U CN2012200800658 U CN 2012200800658U CN 201220080065 U CN201220080065 U CN 201220080065U CN 202453549 U CN202453549 U CN 202453549U
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Abstract
The utility mode relates to an OLT light assembly integrated with an OTDR. The OLT light assembly comprises a horizontal optical axis, a first vertical optical axis, a second vertical optical axis and a third vertical optical axis, wherein a first coaxial light emitting assembly and a single optical fiber are respectively located at two ends of the horizontal optical axis; a second coaxial light emitting assembly is arranged along the first vertical optical axis, a first wavelength division multiplexing (WDM) optical filter is arranged at an intersecting position of the first vertical optical axis and the horizontal optical axis, and a first lens and a second lens are arranged between the optical filter and an optical end face of the single optical fiber; a first coaxial light receiving assembly is arranged along the second vertical optical axis, and a second WDM optical filter is arranged at an intersecting position of the second vertical optical axis and the horizontal optical axis; and a second coaxial light receiving assembly is arranged along the third vertical optical axis, and a beam-splitting sheet is arranged at an intersecting position of the third vertical optical axis and the horizontal optical axis. Failure occurrence positions can be detected conveniently through an OLT module directly when an optical fiber link goes wrong, an independent OTDR is not required, the network maintenance is convenient, and the cost is low.
Description
Technical field
The utility model relates to the optical line terminal (Optical Line Terminal is hereinafter to be referred as OLT) that Optical Access Network is used, and the OLT that relates in particular to a kind of integrated OTDR uses optical assembly.
Background technology
The optical assembly that is used for the OLT end at present comprises: one is used for the light transmit-receive integrated assembly of single fiber, a light emission component, an optical fiber receive module and a wave-division multiplexer filter (WDM filter) formation of transmitted in both directions; Be mainly used in the bidirectional transfer of information that realizes an OLT module and a plurality of ONU (Optical Network Unit) 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 break off OLT; Insert the position of expensive optical time domain reflectometer (Optical Time Domain Reflector is called for short OTDR) trouble-shooting point, cause the high shortcoming of maintenance of network cost.
Summary of the invention
For overcoming above shortcoming, the utility model provides the OLT of a kind of integrated OTDR of compact conformation to use optical assembly.
Be to realize the object of the invention, the OLT of a kind of integrated OTDR of the utility model uses optical assembly, comprising: a horizontal optical axis, first, second and the 3rd vertical optical axis, and one first an axis light emitting module and a single fiber lay respectively at said horizontal optical axis two ends; One second axis light emitting module is along the said first vertical optical axis setting, and this vertical optical axis and said horizontal optical axis intersection are provided with one the one 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 the said second vertical optical axis setting, and this vertical optical axis and said horizontal optical axis intersection are provided with one the 2nd WDM optical filter; One second axis light receiving unit is along said the 3rd vertical optical axis setting, and this vertical optical axis and said horizontal optical axis intersection are provided with a light splitting piece.
Said first, second axis light emitting module is respectively equipped with a Distributed Feedback Laser.
The said first axis light receiving unit is provided with an APD optical receiver.
The said second axis light receiving unit is provided with a PIN optical receiver.
Also comprise an optoisolator, this isolator is between said first, second lens.
Because the OLT of the integrated OTDR of said structure is provided with the second axis light receiving unit that the second axis light emitting module and that is used for transmitting downstream fault diagnosis light signal is used to receive the fault reflected signal with optical assembly; The function of optical time domain reflectometer OTDR is integrated in the common OLT module; When optical fiber link breaks down; Just can directly easily detect the fault occurrence positions through the OLT module, no longer need independent optical time domain reflectometer OTDR, network operation is convenient and cost is low.
Description of drawings
Fig. 1 representes that the OLT of integrated OTDR of the utility model is with optical assembly light channel structure synoptic diagram.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
The OLT of integrated OTDR as shown in Figure 1 uses optical assembly; Comprise: the first axis light emitting module 10 and that a horizontal optical axis X, first, second and the 3rd vertical optical axis Y1, Y2 Y3, OLT end are used for transmitting downstream light signal λ 1 is used to transmit downlink optical signal λ 1 and holds the single fiber 70 of uplink optical signal λ 3 to lay respectively at horizontal optical axis X two ends from ONU; The second axis light emitting module 90 that one OLT end is used for transmitting downstream fault diagnosis light signal λ 2 is provided with along the first vertical optical axis Y1; This vertical optical axis and horizontal optical axis X intersection are provided with one the one WDM optical filter 20; Be provided with first, second lens 30,60 between this optical filter 20 and the single fiber 70 smooth end faces; Downlink optical signal λ 1 and descending fault diagnosis light signal λ 2 transfer to first lens 30 along horizontal optical axis X after total transmissivity and the total reflection respectively through a WDM optical filter 20 and will converge light and become directional light, are incident to second lens 60 again and light transmission to single fiber 70 is converged in the directional light change export.One is used to receive the first axis light receiving unit, 80 edges, the second vertical optical axis Y2 setting of uplink optical signal λ 3; This vertical optical axis and horizontal optical axis X intersection are provided with one the 2nd WDM optical filter 40, are used for uplink optical signal λ 3 total reflection to the first axis light receiving units 80 are received.One be used to receive the reflected signal λ 2 ' of descending fault diagnosis light signal λ 2 the second axis light receiving unit 100 be provided with along the 3rd vertical optical axis Y3; This vertical optical axis and horizontal optical axis X intersection are provided with a light splitting piece 50; This light splitting piece is used for that reflected signal λ 2 ' part luminous power is reflexed to the second axis light receiving unit 100 and receives; Its splitting ratio can be reflection 10%, transmission 90%.Wherein, first, second axis light emitting module 10,90 is respectively equipped with a Distributed Feedback Laser; The first axis light receiving unit 80 is provided with an APD optical receiver; The second axis light receiving unit 100 is provided with a PIN optical receiver.For the laser instrument that reduces first, second axis light emitting module 10,90 disturbs, also comprise an optoisolator 110, this isolator is at first, second lens 30, between 60.The wavelength of downlink optical signal λ 1 can be that the wavelength of 1490nm, descending fault diagnosis light signal λ 2 can be that the wavelength of 1625nm, uplink optical signal λ 3 can be 1310nm.
[0013] OLT of the integrated OTDR of said structure uses optical assembly; Its principle of work is following: the first axis light emitting module, 10 transmitting downstream light signal λ 1---and 1490nm forms first through a WDM optical filter 20 total transmissivities and converges light; The second axis light emitting module, 90 transmitting downstream fault diagnosis light signal λ 2---1625nm forms second through a WDM optical filter 20 total reflections and converges light; First, second converges light and becomes directional light through first lens 30; Behind optoisolator 110, the 2nd WDM optical filter 40 and light splitting piece 50 total transmissivities, be incident to second packaged lens 60 again and become by directional light and converge light, converge to behind the single fiber 70 smooth end faces to the output of ONU end.Uplink optical signal λ 3 from the ONU end---1310nm forms directional light through single fiber 70 smooth surface feeding sputtering to the second packaged lens 60; This directional light is incident to 40 total reflections of the 2nd WDM optical filter again behind light splitting piece 50 total transmissivities, the uplink optical signal λ 3 after the reflection---and 1310nm receives through first optical fiber receive module 80 and converts light signal into electric signal output.When optical fiber link breaks down; Descending fault diagnosis light signal λ 2---1625nm is through the reflection of optical fiber link trouble spot; Its reflected signal λ 2 '---1625nm is through being incident to light splitting piece 50 by converging after light becomes directional light after single fiber 70 smooth surface feeding sputtering to the second packaged lens 60; This light splitting piece reflected optical power 10% to second axis light receiving unit 100 on demand receives, and converts light signal into electric signal output, through this electric signal is carried out analyzing and processing; To confirm the definite position of optical fiber link trouble spot, removed the expensive optical time domain reflectometer of prior art value on demand from.
Claims (5)
1. the OLT of an integrated OTDR uses optical assembly; It is characterized in that; Comprise: a horizontal optical axis (X), first, second and the 3rd vertical optical axis (Y1, Y2 Y3), one first an axis light emitting module (10) and a single fiber (70) lay respectively at said horizontal optical axis (X) two ends; One second axis light emitting module (90) is provided with along said first vertical optical axis (Y1); This vertical optical axis and said horizontal optical axis (X) intersection are provided with one the one 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) is provided with along said second vertical optical axis (Y2), and this vertical optical axis and said horizontal optical axis (X) intersection are provided with one the 2nd WDM optical filter (40); One second axis light receiving unit (100) is provided with along said the 3rd vertical optical axis (Y3), and this vertical optical axis and said horizontal optical axis (X) intersection are provided with a light splitting piece (50).
2. the OLT of integrated OTDR according to claim 1 uses optical assembly, it is characterized in that, said first, second axis light emitting module (10,90) is respectively equipped with a Distributed Feedback Laser.
3. the OLT of integrated OTDR according to claim 2 uses optical assembly, it is characterized in that, the said first axis light receiving unit (80) is provided with an APD optical receiver.
4. the OLT of integrated OTDR according to claim 3 uses optical assembly, it is characterized in that, the said second axis light receiving unit (100) is provided with a PIN optical receiver.
5. the OLT according to claim 1,2,3 or 4 described integrated OTDR uses optical assembly, it is characterized in that, also comprises an optoisolator (110), and this isolator is positioned between said first, second lens (30,60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200800658U CN202453549U (en) | 2012-03-06 | 2012-03-06 | Optical line terminal (OLT) light assembly integrated with optical time domain reflector (OTDR) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200800658U CN202453549U (en) | 2012-03-06 | 2012-03-06 | Optical line terminal (OLT) light assembly integrated with optical time domain reflector (OTDR) |
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| Publication Number | Publication Date |
|---|---|
| CN202453549U true CN202453549U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200800658U Expired - Lifetime CN202453549U (en) | 2012-03-06 | 2012-03-06 | Optical line terminal (OLT) light assembly integrated with optical time domain reflector (OTDR) |
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| CN (1) | CN202453549U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308997A (en) * | 2012-03-06 | 2013-09-18 | 深圳新飞通光电子技术有限公司 | OLT light assembly integrated with OTDR |
| CN104914519A (en) * | 2015-05-22 | 2015-09-16 | 武汉联特科技有限公司 | 40G optical transceiving module |
-
2012
- 2012-03-06 CN CN2012200800658U patent/CN202453549U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308997A (en) * | 2012-03-06 | 2013-09-18 | 深圳新飞通光电子技术有限公司 | OLT light assembly integrated with OTDR |
| CN104914519A (en) * | 2015-05-22 | 2015-09-16 | 武汉联特科技有限公司 | 40G optical transceiving module |
| CN104914519B (en) * | 2015-05-22 | 2017-06-27 | 武汉联特科技有限公司 | A kind of 40G optical transceiver modules |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
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| CX01 | Expiry of patent term |