CN201440659U - Four-wavelength WDM type cable television bidirectional optical node - Google Patents
Four-wavelength WDM type cable television bidirectional optical node Download PDFInfo
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- CN201440659U CN201440659U CN2009201197045U CN200920119704U CN201440659U CN 201440659 U CN201440659 U CN 201440659U CN 2009201197045 U CN2009201197045 U CN 2009201197045U CN 200920119704 U CN200920119704 U CN 200920119704U CN 201440659 U CN201440659 U CN 201440659U
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Abstract
The utility model provides a four-wavelength WDM type cable television bidirectional optical node comprising a WDM wavelength-division multiplex module, a descending optical receiving module, a bidirectional wave filter and an ascending optical transmitting module. The WDM wavelength-division multiplex module is connected with the descending optical receiving module, the descending optical receiving module is connected with the bidirectional wave filter, the bidirectional wave filter is connected with the ascending optical transmitting module, and the ascending optical transmitting module is connected with the WDM wavelength-division multiplex module. The four-wavelength WDM type cable television bidirectional optical node has the following beneficial effects: by adopting the WDM wavelength-division multiplex method, the bidirectional optical node realizes transmission of four-wavelength optical signals in the same optical fiber, so as to greatly reduce the quantity of long-distance transmission of the optical fibers, thereby realizing mergence of a CATV network with an EPON network.
Description
Technical field
The utility model belongs to a kind of cable TV bi-directional light node, is specifically related to four wavelength WDM (optical wavelength-division multiplex, a kind of fiber-optic signal transmission technology) type cable TV bi-directional light node.
Background technology
At present, the cable TV bi-directional light work station of widespread usage or bi-directional light node, general descending employing 1550nm wavelength, up employing 1310nm wavelength, transmission cable TV signal.Along with EPON technology (EPON: the passive all optical network of ether, be a kind of broadband access technology that adopts point-to-multipoint network structure, passive fiber transmission means, multiple integrated service is provided based on Fast Ethernet platform and time-division media interviews control mode) constantly popularizing for the FTTX network of representative, (the FTTX network is a FTTP, the FTTX technology is mainly used in the access network fiberize, to subscriber terminal equipment, local side apparatus is that optical line terminal, ustomer premises access equipment are optical network unit or Optical Network Terminal to scope from the local side apparatus of regional machine room.Distance according to fiber-to-the-subscriber is classified, the FTTC that can divide that Fiber To The Curb, Fiber To The Building FTTB and Fiber to the home FTTH etc., above-mentioned service can be referred to as FTTX) use more and more widely, (the descending employing of EPON 1490nm wavelength, up employing 1310 wavelength), how realizing the network integration, pass CATV (cable TV) signal and EPON signal in the same in other words optical fiber simultaneously, is present urgent problem.
The utility model content
The utility model will solve the shortcoming of above-mentioned prior art, a kind of four wavelength WDM type cable TV bi-directional light nodes are provided, on the basis of common cable TV bi-directional light node, increase the WDM Wavelength division multiplexing module, adopt the mode of wavelength division multiplexing, realize that cable TV signal and EPON signal transmit in same optical fiber.
The technical scheme that its technical problem that solves the utility model adopts is:
This four wavelength WDM type cable TV bi-directional light nodes comprise the WDM Wavelength division multiplexing module, descending Optical Receivers, bidirectional filter, up light emission module.Described WDM Wavelength division multiplexing module is connected with descending Optical Receivers, and descending Optical Receivers is connected with bidirectional filter, and bidirectional filter is sent out transmitter module with up light and is connected, and up light emission module is connected with the WDM Wavelength division multiplexing module.
The beneficial effects of the utility model mainly show: owing to adopt the WDM wave division multiplex mode, realized that four wavelength light signals transmit in same optical fiber, significantly reduced the quantity of long-distance transmissions optical fiber, realized the fusion of catv network and EPON network.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1, this four wavelength WDM type cable TV bi-directional light nodes, comprise WDM Wavelength division multiplexing module 1, descending Optical Receivers 2, bidirectional filter 3, up light emission module 4, described WDM Wavelength division multiplexing module 1 is connected with descending Optical Receivers 2, described descending Optical Receivers 2 is connected with bidirectional filter 3, described bidirectional filter 3 is connected with up light emission module 4, and described up light emission module 4 is connected with WDM Wavelength division multiplexing module 1.
The four wavelength light signals that comprised cable TV signal and EPON signal insert WDM Wavelength division multiplexing module 1, and WDM Wavelength division multiplexing module 1 is told 1550nm, 1590nm, 1310nm ﹠amp; 1490nm wavelength three road interfaces.
The 1550nm wavelength signals is passed to descending Optical Receivers 2, and the cable TV light signal of 1550nm wavelength is converted to the cable TV radiofrequency signal, connects the high go side of bidirectional filter 3, is exported by the common port of bidirectional filter 3 after high-pass filtering.
Up radiofrequency signal is from the common port input of bidirectional filter 3, low go side by bidirectional filter 3 after low-pass filtering outputs to up light emission module 4, and the light signal that up radiofrequency signal is converted to the 1590nm wavelength by the laser in the up light emission module 4 outputs to 1590 wavelength interface of WDM Wavelength division multiplexing module 1.
The 1310nm ﹠amp that WDM Wavelength division multiplexing module 1 is told; The ONU (optical network unit) that the 1490nm wavelength interface offers in the EPON network connects.
Claims (5)
1. wavelength WDM type cable TV bi-directional light node, comprise WDM Wavelength division multiplexing module (1), descending Optical Receivers (2), bidirectional filter (3) and up light emission module (4), it is characterized in that: described WDM Wavelength division multiplexing module (1) is connected with descending Optical Receivers (2), described descending Optical Receivers (2) is connected with bidirectional filter (3), described bidirectional filter (3) is connected with up light emission module (4), and described up light emission module (4) is connected with WDM Wavelength division multiplexing module (1).
2. a kind of four wavelength WDM type cable TV bi-directional light nodes according to claim 1, it is characterized in that: described WDM Wavelength division multiplexing module (1) is told 1550nm, 1590nm, 1310nm﹠amp; 1490nm wavelength three road interfaces.
3. a kind of four wavelength WDM type cable TV bi-directional light nodes according to claim 1, it is characterized in that: described descending Optical Receivers (2) is converted to radiofrequency signal to the cable TV light signal of 1550nm wavelength.
4. a kind of four wavelength WDM type cable TV bi-directional light nodes according to claim 1 is characterized in that: the light signal that the laser in the described up light emission module (4) converts up radiofrequency signal to the 1590nm wavelength outputs to 1590 wavelength interface of WDM Wavelength division multiplexing module (1).
5. a kind of four wavelength WDM type cable TV bi-directional light nodes according to claim 1 is characterized in that: the 1310nm﹠amp that described WDM Wavelength division multiplexing module (1) is told; The ONU that the 1490nm wavelength interface offers in the EPON network connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201197045U CN201440659U (en) | 2009-05-11 | 2009-05-11 | Four-wavelength WDM type cable television bidirectional optical node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201197045U CN201440659U (en) | 2009-05-11 | 2009-05-11 | Four-wavelength WDM type cable television bidirectional optical node |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440659U true CN201440659U (en) | 2010-04-21 |
Family
ID=42545317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201197045U Expired - Lifetime CN201440659U (en) | 2009-05-11 | 2009-05-11 | Four-wavelength WDM type cable television bidirectional optical node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201440659U (en) |
-
2009
- 2009-05-11 CN CN2009201197045U patent/CN201440659U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100421 |
|
| CX01 | Expiry of patent term |