CN102811097A - Single-fiber bidirectional optical transmitting and receiving integrated assembly for optical line terminal (OLT) module - Google Patents
Single-fiber bidirectional optical transmitting and receiving integrated assembly for optical line terminal (OLT) module Download PDFInfo
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- CN102811097A CN102811097A CN2011101440221A CN201110144022A CN102811097A CN 102811097 A CN102811097 A CN 102811097A CN 2011101440221 A CN2011101440221 A CN 2011101440221A CN 201110144022 A CN201110144022 A CN 201110144022A CN 102811097 A CN102811097 A CN 102811097A
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Abstract
The invention provides a single-fiber bidirectional optical transmitting and receiving integrated assembly for an optical line terminal (OLT) module. A first electro-absorption modulated laser (EML) optical transmitting assembly, a wavelength division multiplexer (WDM) filter plate, an optical splitting plate and a single fiber are sequentially arranged along a first optical axis; an included angle between the WDM filter plate and the first optical axis is 136.85 degrees; an included angle between the optical splitting plate and the first optical axis is 46.85 degrees; the inclination of an end surface of a fiber core is 8 degrees; the first optical transmitting assembly transmits a first downlink optical signal to an optical network unit (ONU); a second optical axis and a third optical axis are perpendicular to the first optical axis; a second optical transmitting assembly is arranged along the second optical axis; when the fiber fails, the second optical transmitting assembly transmits a second optical signal to a fiber link failure point; an optical receiving assembly is arranged along the third optical axis; and after a third uplink optical signal transmitted from the ONU or the second optical signal reflected back from the failure point is inputted via the end surface of the fiber core, the optical splitting plate reflects the third uplink optical signal or the second optical signal to the optical receiving assembly according to reflectivity. The specific position and the relevant information of the fiber link failure point can be diagnosed according to electric signals outputted by the optical receiving assembly at an OLT, an optical time domain reflectometer (OTDR) is not required, network maintenance is simple, and cost is low.
Description
Technical field
The present invention relates to be used for 10G EPON (10 Gbit/s Ethernet Passive Optical Network; Abbreviation 10G EPON) the light transmit-receive integrated assembly of the single fiber multi-wavelength bidirectional transmission of system, the optical line terminal OLT module that relates in particular to a kind of 10G EPON is with single fiber bidirectional light receiving and transmitting one assembly.
Background technology
The PON network system is made up of the optical line terminal OLT (Optical Line Terminal) of local side, optical network unit ONU (Optical Network Unit is called for short ONU) and the ODN that connects these nodes.The main feature of PON is a point-to-multipoint.Existing low rate EPON new bandwidth bottleneck will occur with the GPON technology, and the appearance of 10G EPON has been satisfied the growing network bandwidth of present people and to the requirement of speed, and and current GEPON system good compatibility is arranged.Progressively scale commercialization along with 10G EPON networking products; Optical fiber link failure location and maintenance issues become increasingly conspicuous; In the 10G EPON network operation at present,, at first need parting system work if OLT holds the optical fiber link of holding to ONU to break down; The maintenance personal utilizes expensive optical time domain reflectometer OTDR (Optical Time Domain Reflector) to carry out fault location again and detects, and causes system to detect the high and loaded down with trivial details shortcoming of cost thus.
Summary of the invention
For overcoming above shortcoming, the present invention provides the OLT module that has the optical fiber link failure monitor function in a kind of 10G EPON system with single fiber bidirectional light receiving and transmitting one assembly.
For realizing above goal of the invention; The present invention provides a kind of OLT module with single fiber bidirectional light receiving and transmitting one assembly; Set gradually first light emission component, a WDM wavelength division multiplexing filter plate, a light splitting piece, the single mode single fiber that constitute by Electroabsorption Modulated Laser from left to right along a primary optic axis; Said WDM wavelength division multiplexing filter plate and primary optic axis are 136.85 ° ± 3 ° at first inclination angle; Said light splitting piece and primary optic axis are 46.85 ° ± 3 ° at second inclination angle, and said single fiber fibre core end face is oblique 8 °; The said first light emission component emission rate is that 10Gbit/s, wavelength are that the descending first light signal λ 1 of 1577nm successively exports optical network unit ONU to through coupling after being incident to said fibre core end face along primary optic axis after said WDM wavelength division multiplexing filter plate and the whole transmissions of light splitting piece; One second optical axis is vertical with said primary optic axis with one the 3rd optical axis; One second light emission component is along the said second optical axis setting; This assembly emission rate was that 1.25Gbit/s, wavelength are that the second light signal λ 2 of 1310nm is incident to all reflections of said WDM wavelength division multiplexing filter plate 2 backs when the optical fiber link fault took place, and the light signal after the reflection also is incident to said fibre core end face 41 back coupling outputs again along primary optic axis and arrives the optical fiber link fault point; One optical fiber receive module that is made up of the APD avalanche photodide is along said the 3rd optical axis setting; From up the 3rd light signal λ of said optical network unit ONU 3 its speed is that 1.25Gbit/s, wavelength are that the said second light signal λ 2 that 1310nm perhaps reflects from said optical fiber link fault point imports by said single fiber fibre core end face, and the light signal after the input reflexes to said optical fiber receive module with luminous power by reflectivity through said light splitting piece and receives and convert into signal of telecommunication output.
Said second light emission component is made up of a DFB distributed feed-back formula laser.
Said second light emission component also can be made up of a FP fabry perot laser.
Said reflectivity is 90% ± 5%.
Because the OLT module of said structure is with single fiber bidirectional light receiving and transmitting one assembly; To be used for to the optical network unit ONU emission rate be that 10Gbit/s, wavelength are the descending first light signal λ 1 of 1577nm except being provided with; Also be provided with second light emission component that adopts DFB or FP laser; This assembly can be when optical fiber link breaks down, and emission rate is that 1.25Gbit/s, wavelength are the second light signal λ 2 of 1310nm, and therefore the light signal of fault point produces reflection and be back to the fibre core end face along the former road of single fiber; Be incident to light splitting piece; Light splitting piece percentage on request reflexes to optical fiber receive module, carries out after the reception after the opto-electronic conversion signal of telecommunication being exported, and judges the fault point according to the signal of telecommunication of output again.And network system just often, and second light emission component 6 is not worked, and optical fiber receive module receives only the 3rd up light signal λ 3 by the optical network unit ONU emission.Thus; This OLT module has the OTDR function when being used for 10G EPON system with single fiber bidirectional light receiving and transmitting one assembly, and simple in structure, does not need expensive OTDR equipment; And optical fiber link no longer needs system cut-off when breaking down; Only directly carry out failure diagnosis, saved the network operation cost, help the popularization of the progressively scale commercialization of 10G EPON networking products through the OLT module of central machine room.
Description of drawings
Fig. 1 representes the structural representation of OLT module of the present invention with single fiber bidirectional light receiving and transmitting one assembly.
Embodiment
Describe most preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
OLT module as shown in Figure 1 is with single fiber bidirectional light receiving and transmitting one assembly; Set gradually first light emission component 1, a WDM (Wavelength Division Multiplexer) wavelength division multiplexing filter plate that constitute by Electroabsorption Modulated Laser EML (Electro-absorption Modulated Laser) 2, a Splitter light splitting piece 3, a single mode single fiber 4 from left to right along a primary optic axis; WDM wavelength division multiplexing filter plate 2 is 136.85 ° ± 3 ° at first inclination angle with primary optic axis; Light splitting piece 3 is 46.85 ° ± 3 ° at second inclination angle with primary optic axis, and single fiber 4 fibre core end faces 41 are oblique 8 ° (being that fibre core end face 41 is 8 ° with vertical plane).First light emission component, 1 emission rate is that 10Gbit/s, wavelength are that the descending first light signal λ 1 of 1577nm successively is coupled and exports optical network unit ONU to through being incident to fibre core end face 41 backs along primary optic axis after WDM wavelength division multiplexing filter plate 2 and the light splitting piece 3 whole transmissions.One second optical axis is vertical with primary optic axis with one the 3rd optical axis; One second light emission component 6 is along the second optical axis setting; This second light emission component is made up of a DFB (Distributed Feedback Laser) distributed feed-back formula laser or FP (Fabry-Perot) fabry perot laser; When the optical fiber link fault takes place; Second light emission component, 6 emission rates are that 1.25Gbit/s, wavelength are that the second light signal λ 2 of 1310nm is incident to all reflections of WDM wavelength division multiplexing filter plate 2 backs, and the light signal after the reflection also reenters along primary optic axis and is incident upon the 41 back coupling outputs of fibre core end face and arrives the optical fiber link fault point.One optical fiber receive module 5 said the 3rd optical axis settings in edge by APD (Avalanche PhotoDiode) avalanche photodide formation; When the network system operate as normal, be that 1.25Gbit/s, wavelength are that the 1310nm or the second light signal λ 2 that when network failure takes place, reflects from the optical fiber link fault point import by single fiber 4 fibre core end faces 41 from up the 3rd light signal λ of optical network unit ONU 3 its speed; Light signal after the input reflexes to optical fiber receive module 5 with luminous power by reflectivity through light splitting piece 3 and receives and convert into signal of telecommunication output, and its reflectivity can be 90% or other percentage.Like this; The maintenance personal only analyzes according to the optical fiber receive module 5 output signals of telecommunication of the single fiber bidirectional light receiving and transmitting one assembly of OLT end at central machine room; Can diagnose the particular location and the relevant information of optical fiber link failure point, no longer need expensive optical time domain reflectometer OTDR, network operation is simple; Cost is low, and the scale commercialization that helps 10G EPON networking products is promoted.
Claims (4)
1. an OLT module is with single fiber bidirectional light receiving and transmitting one assembly; It is characterized in that; This assembly comprises: set gradually first light emission component (1), a WDM wavelength division multiplexing filter plate (2), a light splitting piece (3), the single mode single fiber (4) that are made up of Electroabsorption Modulated Laser from left to right along a primary optic axis; Said WDM wavelength division multiplexing filter plate (2) is 136.85 ° ± 3 ° at first inclination angle with primary optic axis; Said light splitting piece (3) is 46.85 ° ± 3 ° at second inclination angle with primary optic axis, and said single fiber (4) fibre core end face (41) is oblique 8 °; Said first light emission component (1) emission rate is that 10Gbit/s, wavelength are that the descending first light signal λ 1 of 1577nm successively all is incident to said fibre core end face (41) back along primary optic axis after the transmissions through said WDM wavelength division multiplexing filter plate (2) and light splitting piece (3) and is coupled and exports optical network unit ONU to; One second optical axis is vertical with said primary optic axis with one the 3rd optical axis; One second light emission component (6) is along the said second optical axis setting; This assembly emission rate was that 1.25Gbit/s, wavelength are that the second light signal λ 2 of 1310nm is incident to all reflections behind the said WDM wavelength division multiplexing filter plate (2) when the optical fiber link fault took place, and the light signal after the reflection also is incident to the coupling output of said fibre core end face (41) back again along primary optic axis and arrives the optical fiber link fault point; One optical fiber receive module (5) that is made up of the APD avalanche photodide is along said the 3rd optical axis setting; From up the 3rd light signal λ of said optical network unit ONU 3 its speed is that 1.25Gbit/s, wavelength are that the said second light signal λ 2 that 1310nm perhaps reflects from said optical fiber link fault point imports by said single fiber (4) fibre core end face (41), and the light signal after the input reflexes to said optical fiber receive module (5) with luminous power by reflectivity through said light splitting piece (3) and receives and convert into signal of telecommunication output.
2. OLT module according to claim 1 is characterized in that with single fiber bidirectional light receiving and transmitting one assembly said second light emission component (6) is made up of a DFB distributed feed-back formula laser.
3. OLT module according to claim 1 is characterized in that with single fiber bidirectional light receiving and transmitting one assembly said second light emission component (6) is made up of a FP fabry perot laser.
According to claim 2 or 3 described OLT modules with single fiber bidirectional light receiving and transmitting one assembly, it is characterized in that said reflectivity is 90% ± 5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101440221A CN102811097A (en) | 2011-05-31 | 2011-05-31 | Single-fiber bidirectional optical transmitting and receiving integrated assembly for optical line terminal (OLT) module |
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| CN2011101440221A CN102811097A (en) | 2011-05-31 | 2011-05-31 | Single-fiber bidirectional optical transmitting and receiving integrated assembly for optical line terminal (OLT) module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013189423A3 (en) * | 2013-02-22 | 2014-02-13 | 中兴通讯股份有限公司 | Optical transceiving device and method |
| CN108777430A (en) * | 2018-08-22 | 2018-11-09 | 苏州易锐光电科技有限公司 | Coaxial packaging optical assembly and coaxial packaging laser |
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| CN201583697U (en) * | 2009-12-11 | 2010-09-15 | 深圳新飞通光电子技术有限公司 | OLT single-fiber two-way three-port component |
| CN201716439U (en) * | 2010-07-09 | 2011-01-19 | 深圳新飞通光电子技术有限公司 | Single-fiber, two-way and dual-port optical transmission and reception integrated component |
| CN201804143U (en) * | 2010-05-12 | 2011-04-20 | 深圳新飞通光电子技术有限公司 | OLT (Optical Line Terminal) single fiber bi-directional integral light transmit-receive component |
| CN202050416U (en) * | 2011-05-31 | 2011-11-23 | 深圳新飞通光电子技术有限公司 | Single-fiber two-way light transceiving integrated component for OLT (optical line terminal) module |
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2011
- 2011-05-31 CN CN2011101440221A patent/CN102811097A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201583697U (en) * | 2009-12-11 | 2010-09-15 | 深圳新飞通光电子技术有限公司 | OLT single-fiber two-way three-port component |
| CN201804143U (en) * | 2010-05-12 | 2011-04-20 | 深圳新飞通光电子技术有限公司 | OLT (Optical Line Terminal) single fiber bi-directional integral light transmit-receive component |
| CN201716439U (en) * | 2010-07-09 | 2011-01-19 | 深圳新飞通光电子技术有限公司 | Single-fiber, two-way and dual-port optical transmission and reception integrated component |
| CN202050416U (en) * | 2011-05-31 | 2011-11-23 | 深圳新飞通光电子技术有限公司 | Single-fiber two-way light transceiving integrated component for OLT (optical line terminal) module |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013189423A3 (en) * | 2013-02-22 | 2014-02-13 | 中兴通讯股份有限公司 | Optical transceiving device and method |
| CN104009804A (en) * | 2013-02-22 | 2014-08-27 | 中兴通讯股份有限公司 | Light transmit-receive device and method |
| EP2953278A4 (en) * | 2013-02-22 | 2016-03-16 | Zte Corp | Optical transceiving device and method |
| JP2016513417A (en) * | 2013-02-22 | 2016-05-12 | ゼットティーイー コーポレイション | Optical transceiver and method |
| CN108777430A (en) * | 2018-08-22 | 2018-11-09 | 苏州易锐光电科技有限公司 | Coaxial packaging optical assembly and coaxial packaging laser |
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