CN201438232U - Mixed integration-type OLT optical receiving device - Google Patents
Mixed integration-type OLT optical receiving device Download PDFInfo
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- CN201438232U CN201438232U CN2009201341309U CN200920134130U CN201438232U CN 201438232 U CN201438232 U CN 201438232U CN 2009201341309 U CN2009201341309 U CN 2009201341309U CN 200920134130 U CN200920134130 U CN 200920134130U CN 201438232 U CN201438232 U CN 201438232U
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- optical fiber
- coupler
- olt
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Abstract
The utility model provides a mixed integration-type OLT optical receiving device, comprising an MX1 optical coupler, the input end 11 of the MX1 optical coupler is provided with a plurality of single mode fibers for transmitting multipath ascending optical signals respectively, the output end thereof is provided with a multi-mode optical fiber for transmitting the multipath ascending optical signals which is combined; and an optical receiving assembly which is used for receiving the combined signal of the multipath ascending optical signals transmitted by the multi-mode optical fiber from the output end of the optical coupler and converting the combined signal into an electrical signal to be output. The optical coupler is a 4*1 melting tapered optical multiplexer unit, the input end of the optical coupler is provided with four-path single mode fibers for transmitting on path of the ascending optical signal respectively, and the output end there of is provided with a multi-mode optical fiber for transmitting the combined ascending optical signal. The optical receiving assembly is an APD optical receiving assembly packaged with TO-CAN coaxially, and the optical interface is coupled with on-axis light of the multi-mode optical fiber at the output end of the optical coupler. By adopting the optical receiving device with the structure, the quantity of accessed ONU ports is increased on the common OLT.
Description
Technical field
The utility model relates to the optical pickup apparatus of the optical line terminal OLT that is used for the passive optical network PON system, relates in particular to a kind of mixing integrated form OLT optical pickup apparatus.
Background technology
Passive optical network PON system as shown in Figure 1 comprises optical line terminal OLT, the passive optical splitter 1:N Splitter in the way of central machine room and is positioned at the optical network unit ONU of user side.Though generally all adopt the encapsulating structure of the single fiber transmitted in both directions integrated module of optical transceiver with ONU and OLT, the high power light emission of OLT and the requirement of highly sensitive receptivity make the cost of OLT in whole PON system occupy larger proportion.The photosynthetic light ratio example of the branch of passive optical splitter Splitter adopted 1: 16,1: 32,1: 64 usually, and promptly the interface of an optical line terminal OLT can be supported the access of 16,32 or 64 user side optical network unit ONU.Because present OLT module comprises: an optical transmitting set TOSA, an optical receiver ROSA, a WDM Filter wave filter and a single fiber.The light of optical transmitting set TOSA emission by after the WDM Filter filter transmission by the single fiber downlink transfer to passive optical splitter 1:NSplitter, receive respectively by its beam split to N ONU module, on the contrary, the uplink optical signal of each ONU module emission then closes behind the ripple optical receiver that is incident to after the WDM Filter wave filter total reflection of OLT end by the OLT module by single fiber by same passive optical splitter 1:N Splitter and receives.Because fiber-to-the-home application is more and more universal, user side optical network unit ONU quantity increases, optical-fiber network operator is in order to simplify network structure and to reduce cost, on the basis based on conventional network equipment, need not to increase the quantity of the OLT of central machine room, but can improve ONU access interface quantity, become pressing for of current each operator.
Summary of the invention
In order to overcome above shortcoming, the ONU that increases OLT inserts quantity, and the utility model provides a kind of mixing integrated form OLT optical pickup apparatus that can receive the multichannel uplink optical signal simultaneously.
For reaching above goal of the invention, the utility model provides a kind of mixing integrated form OLT optical pickup apparatus, it is characterized in that, comprise: a M * 1 photo-coupler, its input end is that many single-mode fibers are used for transmitting respectively the multichannel uplink optical signal, and its output terminal is the multichannel uplink optical signal after a multimode optical fiber is used to transmit the ECDC ripple; One optical fiber receive module is used to receive from the light signal behind the ECDC ripple of the multimode optical fiber transmission of described photo-coupler output terminal and converts thereof into electric signal output.
Described photo-coupler is 4 * 1 fused biconical taper optical multiplexer, and its input end is that 4 road single-mode fibers are used for respectively transmission of one line uplink optical signal, and the multimode optical fiber of its output terminal is used to transmit the uplink optical signal behind the ECDC ripple.
Described optical fiber receive module is the APD optical fiber receive module of TO-CAN coaxial packaging, the multimode optical fiber axis light coupling of its optical interface and described photo-coupler output terminal.
Because the OLT of the central machine room of PON system end has adopted the mixing integrated form OLT optical pickup apparatus of said structure, original OLT optical fiber receive module ROSA is increased receive the multichannel uplink optical signal, so only need OLT is disposed a plurality of WDM wavelength division multiplexers, the downlink optical signal beam split that makes same light emission component TOSA is to multichannel, just can expand the ONU port number of whole OLT, only can receive N ONU user as an original OLT, adopt OLT of the present invention can increase to the ONU port number of M * N, can effectively reduce whole passive optical network PON system cost like this.
Description of drawings
Fig. 1 represents the passive optical network PON system light path transmission synoptic diagram of prior art;
Fig. 2 represents the utility model mixing integrated form OLT optical pickup apparatus structural representation;
Fig. 3 represents the practical application synoptic diagram of OLT optical pickup apparatus shown in Figure 2 in the PON system.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
Mixing integrated form OLT optical pickup apparatus 100 as shown in Figure 2, comprise: M * 1 photo-coupler 10, its input end 11 is used for transmitting respectively the multichannel uplink optical signal for many single-mode fibers, and its output terminal 12 is the multichannel uplink optical signal after a multimode optical fiber is used to transmit the ECDC ripple; One optical fiber receive module ROSA 20 is used to receive the photo-coupler 10 of hanging oneself and closes the light signal of ripple and convert thereof into electric signal output.In the present embodiment, photo-coupler 10 adopts 4 * 1 fused biconical taper optical multiplexer, and its input end is that 4 road single-mode fibers are used for transmission of one line uplink optical signal respectively, and the multimode optical fiber of its output terminal is used to transmit the uplink optical signal after photo-coupler closes ripple.Optical fiber receive module 20 is the APD optical fiber receive module ROSA of TO-CAN coaxial packaging, the multimode optical fiber axis light coupling of its optical interface and photo-coupler 10 output terminals 12.
As shown in Figure 3, the practical application synoptic diagram of the present invention's mixing integrated form OLT optical pickup apparatus 100 New O LT end in the PON system, New O LT end in this system adopts the discrete components and parts to form, comprise an optical transmitting set TOSA, the optical branching filter of one 1 * M is used for the emission light beam split of this transmitter is become M road downlink optical signal, one the present invention's mixing integrated form OLT optical pickup apparatus 100 and M WDM wave filter are used for holding transmitting downstream light signal and reception uplink optical signal to carry out wavelength-division multiplex OLT, among the present invention, the M value is 4, and promptly New O LT end is provided with 4 WDM wave filters.The principle of work of New O LT end:
A, descending light path, the optical branching filter of the downlink optical signal of optical transmitting set emission by 1 * M is divided into four road downlink optical signals and is incident to each WDM wave filter, the descending again 1:N passive optical splitter that exports to after its transmission, after its beam split to N ONU port, realize thus New O LT only the downlink optical signal of an optical transmitting set TOSA just can transfer to M * N ONU port, than the original downlink transfer ability that has increased by four times.
B, up light path, after passive optical splitter 1:N closes ripple, input to New O LT from N ONU user side uplink optical signal in the prior art PON system and hold one of them WDM wavelength division multiplexer, and this moment, New O LT end has M WDM wavelength division multiplexer altogether, M road uplink optical signal closes ripple by the optical coupler 10 of the present invention's mixing integrated form OLT optical pickup apparatus 100 again and is traveling optical signal on the way, and receive, and convert thereof into electric signal output by the APD optical fiber receive module that the multimode optical fiber of the output terminal 12 of optical coupler 10 is coupled to the TO-CAN coaxial packaging.Thus, optical fiber receive module ROSA of New O LT end just can receive the uplink optical signal of M * N ONU port, than the uplink ability that had increased four times originally.
Claims (3)
1. one kind is mixed integrated form OLT optical pickup apparatus, it is characterized in that, comprise: a M * 1 photo-coupler (10), its input end (11) is used for transmitting respectively the multichannel uplink optical signal for many single-mode fibers, and its output terminal (12) is the multichannel uplink optical signal after a multimode optical fiber is used to transmit the ECDC ripple; One optical fiber receive module (20) is used for receiving from the light signal behind the ECDC ripple of the multimode optical fiber transmission of described photo-coupler (10) output terminal (12) and converts thereof into electric signal output.
2. mixing integrated form OLT optical pickup apparatus according to claim 1, it is characterized in that, described photo-coupler (10) is 4 * 1 fused biconical taper optical multiplexer, its input end (11) is that 4 road single-mode fibers are used for respectively transmission of one line uplink optical signal, and the multimode optical fiber of its output terminal (12) is used to transmit the uplink optical signal behind the ECDC ripple.
3. mixing integrated form OLT optical pickup apparatus according to claim 2, it is characterized in that, described optical fiber receive module (20) is the APD optical fiber receive module of TO-CAN coaxial packaging, and the multimode optical fiber of its optical interface and described photo-coupler (10) output terminal (12) draws the coupling of awl end axis light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201341309U CN201438232U (en) | 2009-07-24 | 2009-07-24 | Mixed integration-type OLT optical receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201341309U CN201438232U (en) | 2009-07-24 | 2009-07-24 | Mixed integration-type OLT optical receiving device |
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| Publication Number | Publication Date |
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| CN201438232U true CN201438232U (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201341309U Expired - Fee Related CN201438232U (en) | 2009-07-24 | 2009-07-24 | Mixed integration-type OLT optical receiving device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467974A (en) * | 2013-09-18 | 2015-03-25 | 福州高意通讯有限公司 | Single-fiber bidirectional BOSA structure for high-speed transceiving system |
| CN114355526A (en) * | 2022-02-17 | 2022-04-15 | Nano科技(北京)有限公司 | Integrated transmit-receive packaged optical component |
-
2009
- 2009-07-24 CN CN2009201341309U patent/CN201438232U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467974A (en) * | 2013-09-18 | 2015-03-25 | 福州高意通讯有限公司 | Single-fiber bidirectional BOSA structure for high-speed transceiving system |
| CN114355526A (en) * | 2022-02-17 | 2022-04-15 | Nano科技(北京)有限公司 | Integrated transmit-receive packaged optical component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Sun Huaimei Document name: Patent certificate of utility model |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN FIBERCOM TECHNOLOGY CO., LTD. Free format text: FORMER NAME: FIBERCOM TECHNOLOGIES (SHENZHEN) CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518057 Shenzhen Nanshan District City Xili town new Wai Wang Tong Industrial Zone in the 12 floor of building 6 North 01 Patentee after: Shenzhen City Fibercom Technology Co., Ltd. Address before: The third floor of No. 28 South Chong Technology Building in Nanshan District Tonggu road Shenzhen city Guangdong province 518057 Patentee before: Fibercom Technologies (Shenzhen) Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Sun Huaimei Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20130724 |