CN203800943U - Novel light transmitting-receiving transmission device - Google Patents
Novel light transmitting-receiving transmission device Download PDFInfo
- Publication number
- CN203800943U CN203800943U CN201420140145.7U CN201420140145U CN203800943U CN 203800943 U CN203800943 U CN 203800943U CN 201420140145 U CN201420140145 U CN 201420140145U CN 203800943 U CN203800943 U CN 203800943U
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- light
- wavelength division
- division multiplexer
- bidirectional filter
- optical
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 14
- 230000008054 signal transmission Effects 0.000 claims abstract description 6
- 230000035945 sensitivity Effects 0.000 claims description 8
- 239000000835 fiber Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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- Optical Communication System (AREA)
Abstract
A novel light transmitting-receiving transmission device comprises a bidirectional filter, wherein a Mini CMTS head end and the bidirectional filter transmit radiofrequency signals to each other. The bidirectional filter is connected with a downlink 1550nm directly-regulating light emission circuit, the downlink 1550nm directly-regulating light emission circuit is connected with a wavelength division multiplexer, the wavelength division multiplexer is connected with an uplink high-sensitivity light reception circuit, the uplink high-sensitivity light reception circuit is connected with the bidirectional filter, and the light signal transmission end of the wavelength division multiplexer is connected with a light demultiplexer which can be connected with four or eight light nodes. The novel light transmitting-receiving transmission device has the advantages that the radiofrequency signals output by the Mini CMTS head end are converted into optical signals, the loss of fiber transmission is lower than transmission via coaxial cables, and the transmission distance is increased. The optical signals can be connected with the four or eight light nodes via the light demultiplexer, each light node covers 30 to 50 users, and the average apportioned cost of the users is reduced.
Description
Technical field
The utility model belongs to optical communication technique field, relates to a kind of novel light transmitting-receiving transmission equipment.
Background technology
At present, in broadcasting and TV NGB access network technology, C-DOCSIS technology Yin Qiyan holds the advantages such as DOCSIS series international standard, CMTS+CM network compatibility, high-transmission bandwidth, is had an optimistic view of, at present in the stage of applying by industry.In broadcasting and TV Access Network, optical node generally adopts passive coaxial distribution network to user side, covers 30～50 family users.The C-DOCSIS headend Mini CMTS that is positioned over optical node place exists and covers the problems such as user is few, overhead cost is high per family, coaxial transmission distance is limited in application process, becomes the bottleneck of spread.
Summary of the invention
The utility model provides a kind of radiofrequency signal Mini CMTS head end output to convert optical signal transmission to, and that user covers is high, reduce the novel light transmitting-receiving transmission equipment of overhead cost per family.
The technical solution adopted in the utility model is:
A kind of novel light transmitting-receiving transmission equipment, it is characterized in that: comprise the bidirectional filter with the mutual radiofrequency signal of Mini CMTS head end, described bidirectional filter is connected with the straight light modulation radiating circuit of descending 1550nm, the straight light modulation radiating circuit of described descending 1550nm is connected with wavelength division multiplexer, described wavelength division multiplexer is connected with up high sensitivity optical receiving circuit, described up high sensitivity optical receiving circuit is connected with bidirectional filter, and the optical signal transmission end of described wavelength division multiplexer can connect with the optical branching device that is connected 4 or 8 optical nodes.
The beneficial effects of the utility model are mainly manifested in: use this novel light transmitting-receiving transmission equipment, the radiofrequency signal of Mini CMTS head end output is converted to optical signal transmission.Utilize the feature that Optical Fiber Transmission is less than coaxial cable loss, extend transmission distance.Light signal can connect 4 or 8 optical nodes by optical branching device, the same covering of each optical node 30～50 family users, i.e. and Mini CMTS head end covering number of users can improve 4 times or 8 times, reduces overhead cost per family.
Brief description of the drawings
fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is further described, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model contained all alternatives, improvement project and the equivalents that within the scope of claims, may comprise.
With reference to Fig. 1, a kind of novel light transmitting-receiving transmission equipment, comprise the bidirectional filter 1 with the mutual radiofrequency signal of Mini CMTS head end, described bidirectional filter 1 is connected with the straight light modulation radiating circuit 2 of descending 1550nm, the straight light modulation radiating circuit 2 of described descending 1550nm is connected with wavelength division multiplexer 4, described wavelength division multiplexer 4 is connected with up high sensitivity optical receiving circuit 3, described up high sensitivity optical receiving circuit 3 is connected with bidirectional filter 1, and the optical signal transmission end of described wavelength division multiplexer 4 can connect with the optical branching device that is connected 4 or 8 optical nodes.
Described bidirectional filter 1 adopts the ZBB5PD-65/87 type device of Guangdian Science & Technology Co., Ltd., Zhejiang.Isolate 87～1000MHz high communication number, be connected with the straight light modulation radiating circuit 2 of descending 1550nm; Isolate 5～65MHz low-pass signal, be connected with up high sensitivity optical receiving circuit 3.
The straight light modulation radiating circuit 2 of descending 1550nm adopts the DFB-1550-BF type laser of AOI company, and 87～1000MHz radiofrequency signal is modulated to 1550nm wavelength light wave transmissions.
Up high sensitivity optical receiving circuit 3 adopts the BLPD-PSA1-40BR type photoelectric conversion tube of Xiamen Bei Lai communication equipment Co., Ltd, and received optical power scope can reach-21～-3dBm.
What wavelength division multiplexer 4 adopted Guilin Guang Long Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017 draws bevel-type wavelength division multiplexer PWDM-T1550/R1310, synthetic descending 1550nm light signal and up 1310nm light signal.
Claims (1)
1. a novel light transmitting-receiving transmission equipment, it is characterized in that: comprise the bidirectional filter with the mutual radiofrequency signal of Mini CMTS head end, described bidirectional filter is connected with the straight light modulation radiating circuit of descending 1550nm, the straight light modulation radiating circuit of described descending 1550nm is connected with wavelength division multiplexer, described wavelength division multiplexer is connected with up high sensitivity optical receiving circuit, described up high sensitivity optical receiving circuit is connected with bidirectional filter, and the optical signal transmission end of described wavelength division multiplexer can connect with the optical branching device that is connected 4 or 8 optical nodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420140145.7U CN203800943U (en) | 2014-03-26 | 2014-03-26 | Novel light transmitting-receiving transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420140145.7U CN203800943U (en) | 2014-03-26 | 2014-03-26 | Novel light transmitting-receiving transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800943U true CN203800943U (en) | 2014-08-27 |
Family
ID=51383127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420140145.7U Expired - Fee Related CN203800943U (en) | 2014-03-26 | 2014-03-26 | Novel light transmitting-receiving transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203800943U (en) |
-
2014
- 2014-03-26 CN CN201420140145.7U patent/CN203800943U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 |