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Colorless ONU uplink wavelength realizing device and method based on rayleigh scattering effect

A technology of Rayleigh scattering and wavelength, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve problems such as increasing system costs and increasing system complexity, and achieve the effects of reducing operating costs, simplifying operation control, and installation and maintenance

Inactive Publication Date: 2014-09-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

However, in the current colorless ONU solution based on wavelength tunable lasers, each ONU cannot independently implement the setting of the upstream wavelength, and requires unified control by the OLT and an additional wavelength selection control module to realize the configuration of the wavelength of the wavelength tunable laser at the ONU end. , this method will undoubtedly increase the complexity of the system and increase the cost of the system

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  • Colorless ONU uplink wavelength realizing device and method based on rayleigh scattering effect
  • Colorless ONU uplink wavelength realizing device and method based on rayleigh scattering effect
  • Colorless ONU uplink wavelength realizing device and method based on rayleigh scattering effect

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Embodiment Construction

[0029] A device and method for realizing colorless ONU upstream wavelength configuration based on the Rayleigh scattering effect proposed by the present invention will be described in detail below with reference to the drawings and embodiments.

[0030] figure 1 It is a schematic structural diagram of a WDM-PON system embodiment proposed by the present invention, specifically including: optical line terminal OLT101, feeder fiber FF102, remote node RN103, branch feeder fiber DF104 and optical network unit ONU105.

[0031] The optical line terminal OLT101 is composed of an optical transmitter module 1011 , an optical receiver module 1012 and an optical wavelength division multiplexing / demultiplexing module 1013 . The passband wavelengths of the optical wavelength division multiplexer / demultiplexer 1013 are λ1λ2...λ2n-1λ2n, the working wavelengths of the optical transmitter module 1011 are λ1λ3...λ2n-1λ2n+1, and the optical receiver modules 1012 and 1013 passband wavelengths λ2λ4...

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Abstract

The invention provides a colorless ONU uplink wavelength realizing device based on a rayleigh scattering effect, and relates to the technical field of a wave division multiplexing passive optical network (WDM-PON). The device comprises a wavelength control unit, a wavelength tunable laser, an optical circulator, an optical power meter and an optical fiber. The optical power meter, the wavelength control unit and the wavelength tunable laser are sequentially connected. The wavelength tunable laser is connected with a first port of the optical circulator. The optical fiber is connected with a second port of the optical circulator. The optical power meter is connected with a third port of the optical circulator. The invention further discloses a colorless ONU uplink wavelength setting method based on the rayleigh scattering effect and a WDM-PON system. According to the invention, the problem of complex interactive control in the existing wavelength tunable laser scheme is avoided; an ONU independently sets the uplink wavelength; the device and the method realizes the colorless ONU through autonomous control; operation, control, installation and maintenance of the ONU are further simplified; and the system operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wavelength division multiplexing passive optical network (WDM-PON), in particular to a device and method for realizing the uplink wavelength of a colorless ONU based on the Rayleigh scattering effect. Background technique [0002] The passive optical access network (Passive Optical Access Network) has become the main technology to realize FTTx. The industry has established relevant standards for a series of passive optical access networks (such as GPON and EPON) and deployed them commercially. These solutions use time-division multiplexing, using passive remote nodes such as optical splitters / combiners between the OLT and the ONU to realize networking, and the cost is low, so it has become the main solution for optical access. However, with the rapid development of broadband access services, the system capacity of the existing TDM (Time Division Multiplexing) PON is increasingly unable to meet the demand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2537
Inventor 张治国许鹏陈雪王立芊张民
Owner BEIJING UNIV OF POSTS & TELECOMM
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