CN2822040Y - Light module for light line terminal - Google Patents
Light module for light line terminal Download PDFInfo
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- CN2822040Y CN2822040Y CNU2005200659937U CN200520065993U CN2822040Y CN 2822040 Y CN2822040 Y CN 2822040Y CN U2005200659937 U CNU2005200659937 U CN U2005200659937U CN 200520065993 U CN200520065993 U CN 200520065993U CN 2822040 Y CN2822040 Y CN 2822040Y
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Abstract
The utility model provides a light module for a light line terminal, which is characterized in that the utility model comprises a casing of the light module, wherein the inner part of the casing is provided with a light amplifier, a 1*N light power distributor and N wavelength division multiplexer arrays, and the output end of the light amplifier inputs amplified light signals with the wavelength of lambda 1 to the 1*N light power distributor. After distribution is carried out, the light signal lambda 1 of each light path carries out incidence to a high reflectinon film through the first port of a respectively corresponding wavelength division multiplexer. After the reflection is carried out, the light signal lambda 1 is output to ONU through a second port, and simultaneously, the ONU carries out the incidence of a light signal with the wavelength of lambda 2 to the wavelength division multiplexer through the second port. After the light signal is transmitted by the high reflection film, the light signal is output to OLT through a third port and the OLT simultaneously inputs a light signal with the wavelength of lambda 3 through the third port. After the light signal is input and is transmitted by an anti-reflection film of the wavelength division multiplexer, the light signal is output to the ONU through the second port. The light module for the light line terminal with the structure has the advantages of compactness, small volume and convenient use.
Description
Technical field
The utility model relates to a kind of FTTP FTTP (Fiber to the premise) optical communications module that the optical access network transmission system is used, and relates in particular to the optical module that a kind of optical line terminal is used.
Background technology
Opening and user's growing with each passing day along with telecommunications and fast development of information technology and telecommunication market to the multiple business demand, the trend that has occurred " unification of three nets " in the world, promptly original independent design operation are based on the conventional telecommunications net of call voice (voice) business, be the master computer net and just trending towards interpenetrating and mutual fusion based on the CATV net of video business (video) with internet (intel) business.Wherein, FTTP FTTP is the preferred plan of " unification of three nets ", and FTTP is the final ideal of broadband access development.FTTP is one three a high network: with a large bandwidth and at a high rate, high-quality, be the most advanced means that present global user inserts, because it can satisfy the multiple demand of all types of user, the communication of image height speed, home shopping, real time remote education, video request program (VOD), high definition TV (HDTV), IPTV and CATV or the like.
Cable TV has enough strong signal in order to guarantee to arrive the end user, and the erbium-doped fiber amplifier that CATV uses (EDFA) is commonly used to amplify the light signal that is loaded with cable TV; It is several that cable TV signal after the amplification carries out power division through 1 * N luminous-power distributor (Splitter), and every road light signal is transferred to the end user after all the light signal by a wavelength division multiplexer (WDM) and transmission of digital signals closes ripple.This EDFA and the transmission system that forms of Splitter and WDM array by three's divergence type, its volume is big, and the space that takies Central Office (CO) is many, and the cost height.
Summary of the invention
The present utility model purpose: for overcoming above shortcoming, the utility model provides a kind of compact conformation, and it is little to take up room, the optical module that the optical line terminal that cost is low is used.
For realizing above goal of the invention, the optical module that the utility model provides a kind of optical line terminal to use, comprise: a housing, this housing is built-in with: an image intensifer, the luminous-power distributor of one 1 * N and N has first port, the wavelength division multiplexer array of second port and the 3rd port, the output of described image intensifer is the light signal of λ 1 to luminous-power distributor input wavelength after amplifying of 1 * N, distribute through its luminous power, distribute each light path light signal λ 1 of back to be incident to its highly reflecting films through first port of each self-corresponding wavelength division multiplexer, the reflection back exports optical network unit (ONU) to by second port, ONU is the light signal of λ 2 through this second port to wavelength division multiplexer incident one wavelength simultaneously, the transmission of its high transmission film of process is after the 3rd port exports optical line terminal (OLT) to, and OLT simultaneously also imports the light signal that a wavelength is λ 3 through the 3rd port, the input back by the anti-reflection film transmission of wavelength division multiplexer after second port exports ONU to.
The luminous-power distributor of described 1 * N can be the luminous-power distributor of silicon-base plane fiber waveguide PLC type 1 * N.
The array of the luminous-power distributor of described a 1 * N and N wavelength division multiplexer forms the integrated optical module of a silicon-base plane fiber waveguide PLC type 1 * N.
The light allotment ratio of the luminous-power distributor of described 1 * N can be 1: 4,1: 8,1: 16,1: 32 or 1: 64.
Described image intensifer can be wide device of Er-doped fiber or Erbium Doped Waveguide Amplifier
The value of described wavelength of optical signal λ 1, λ 2, λ 3 is respectively 1550nm, 1310nm and 1490nm.
Because the optical module that the optical line terminal of said structure is used, the image intensifer (EDFA) of existing divergence type, luminous-power distributor (Splitter) and wavelength division multiplexer (WDM) the array three of 1 * N are integrated in the housing, compact conformation, easy to use, cost is low, can also improve simultaneously the reliability and the stability of whole EPON (PON).
Description of drawings
Fig. 1 represents the light path principle figure of the optical module that the utility model optical line terminal is used.
Specific embodiment
By shown in Figure 1, the optical module 100 that optical line terminal is used, comprise: a housing 10, this housing 10 is built-in with: the luminous-power distributor 30 of an image intensifer 20, one 1 * N and N wavelength division multiplexer (WDM) 40 arrays with first port 41, second port 42 and the 3rd port 43.Image intensifer 20 can adopt wide device of Er-doped fiber (EDFA) or Erbium Doped Waveguide Amplifier (EDWA), adopts EDFA in this example.The output of image intensifer 20 is the light signal of λ 1 (1550nm) to luminous-power distributor 30 inputs wavelength after amplifying of 1 * N, carrying out luminous power distributes, each light path light signal λ 1 after the distribution is incident to its highly reflecting films through first port 41 of each self-corresponding wavelength division multiplexer 40, the reflection back exports optical network unit (ONU) to by second port 42, ONU is the light signal of λ 2 (1310nm) through this second port 42 to wavelength division multiplexer 40 incidents one wavelength again simultaneously, then export optical line terminal (OLT) to after the transmission through the high transmission film in the wavelength division multiplexer 40 through the 3rd port 43, and OLT is the light signal of λ 3 (1490nm) through the 3rd port 43 inputs one wavelength simultaneously, the input back by the anti-reflection film transmission of wavelength division multiplexer 40 after second port 42 exports ONU to.The luminous-power distributor 30 of 1 * N adopts silicon-base plane fiber waveguide (PLC Splitter) type, and its luminous power allotment ratio can be made into 1: 4,1: 8,1: 16,1: 32 or 1: 64 as required.
In addition, the luminous-power distributor 30 of 1 * N also can be integrated in simultaneously with the array of wavelength division multiplexer 40 and form an integrated optical module on the silicon-base plane fiber waveguide, this optical module and image intensifer 20 are integrated in the housing 10 again, and then the volume of the optical module used of overall optical line terminal is compact more.
The optical module that optical line terminal of the present utility model is used adopts the array three with image intensifer 20, luminous-power distributor 30 and wavelength division multiplexer 40 to become one, only be packaged in it by a housing 10, the optical module compact conformation that the optical line terminal of this structure is used, volume is little, easy to use, and also improved the reliability and the stability of whole EPON (PON).
Claims (6)
1, the optical module that a kind of optical line terminal is used (100), it is characterized in that, comprise: a housing (10), this housing (10) is built-in with: an image intensifer (20), the luminous-power distributor of one 1 * N (30) and N has first port (41), wavelength division multiplexer (40) array of second port (42) and the 3rd port (43), the output of described image intensifer (20) is the light signal of λ 1 to luminous-power distributor (30) input wavelength after amplifying of 1 * N, distribute through its luminous power, distribute each light path light signal λ 1 of back to be incident to its highly reflecting films through first port (41) of each self-corresponding wavelength division multiplexer (40), the reflection back exports optical network unit to by second port (42), optical network unit is the light signal of λ 2 through this second port (42) to wavelength division multiplexer (40) incident one wavelength simultaneously, the transmission of its high transmission film of process is after the 3rd port (43) exports optical line terminal to, and optical line terminal is the light signal of λ 3 through the 3rd port (43) input one wavelength also simultaneously, the input back by the anti-reflection film transmission of wavelength division multiplexer (40) after second port (42) exports optical network unit to.
2, the optical module used of optical line terminal according to claim 1 is characterized in that the luminous-power distributor of described 1 * N (30) is the luminous-power distributor of silicon-base plane fiber waveguide PLC type 1 * N.
3, the optical module used of optical line terminal according to claim 1 is characterized in that, the luminous-power distributor of described 1 * N (30) and the array of N wavelength division multiplexer (40) form the integrated optical module of a silicon-base plane fiber waveguide PLC type 1 * N.
4, the optical module of using according to claim 1,2 or 3 described optical line terminals is characterized in that, the light allotment ratio of the luminous-power distributor of described 1 * N (30) can be 1: 4,1: 8,1: 16,1: 32 or 1: 64.
5, the optical module used of optical line terminal according to claim 4 is characterized in that described image intensifer (20) can be wide device of Er-doped fiber or Erbium Doped Waveguide Amplifier.
6, the optical module used of optical line terminal according to claim 1 is characterized in that the value of described wavelength of optical signal λ 1, λ 2, λ 3 is respectively 1550nm, 1310nm and 1490nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200659937U CN2822040Y (en) | 2005-10-18 | 2005-10-18 | Light module for light line terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200659937U CN2822040Y (en) | 2005-10-18 | 2005-10-18 | Light module for light line terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2822040Y true CN2822040Y (en) | 2006-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200659937U Expired - Lifetime CN2822040Y (en) | 2005-10-18 | 2005-10-18 | Light module for light line terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2822040Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427566A (en) * | 2011-11-15 | 2012-04-25 | 中国联合网络通信集团有限公司 | Coexistence and evolution method and system from traditional optical network to target optical network |
-
2005
- 2005-10-18 CN CNU2005200659937U patent/CN2822040Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427566A (en) * | 2011-11-15 | 2012-04-25 | 中国联合网络通信集团有限公司 | Coexistence and evolution method and system from traditional optical network to target optical network |
| CN102427566B (en) * | 2011-11-15 | 2015-07-08 | 中国联合网络通信集团有限公司 | Coexistence and evolution method and system from traditional optical network to target optical network |
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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: 20060927 |
|
| EXPY | Termination of patent right or utility model |