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Method of setting colorless optical network unit uplink optical wavelength based on beat noise

A network unit and optical wavelength technology, applied in the passive optical network field of wavelength division multiplexing, can solve the problems of not increasing the cost and reducing the reliability, and achieve the effect of simple function, high reliability and low cost

Active Publication Date: 2015-09-02
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to make the colorless ONU based on a tunable laser or a tunable optical transmitter independently implement the setting of the upstream optical wavelength without an OLT without increasing the cost and reducing the reliability ,

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  • Method of setting colorless optical network unit uplink optical wavelength based on beat noise
  • Method of setting colorless optical network unit uplink optical wavelength based on beat noise
  • Method of setting colorless optical network unit uplink optical wavelength based on beat noise

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Embodiment Construction

[0028] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0029] Figure 1a , Figure 1b It is a structural diagram of the WDM PON system in the present invention, specifically including: an optical line terminal 101 , a feeder fiber 102 , a remote node 103 , a branch fiber 104 and an optical network unit 105 .

[0030] Figure 1b Among them, the optical line terminal 101 is composed of an optical receiver module 1011 , an optical transmitter module 1012 , an optical wavelength division multiplexing and demultiplexing module 1013 and an optical circulator 1014 . Figure 1a The passband wavelengths of the optical wavelength division multiplexing and demultiplexer 1013 in the shown WDM PON system with different wavelengths for uplink and downlink are λ1λ2...

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Abstract

The invention relates to a method of setting a colorless optical network unit uplink optical wavelength based on beat noise. In a colorless ONU (105), a low bandwidth photoelectric detector used for generating beat noise is accessed; a microwave power meter transmits detected beat noise power to a control unit (1053) in real time; the control unit (1053) determines whether a current output optical wavelength of a tunable laser or a tunable optical transmitter is consistent with the wavelength of a downlink optical signal, and if yes, the operating wavelength of the tunable laser or the tunable optical transmitter is set as a current optical wavelength or a specified optical wavelength, otherwise the control unit (1053) controls the tunable laser or the tunable optical transmitter to continuously perform optical wavelength polling. According to the method, a colorless ONU based on a tunable laser or a tunable optical transmitter can independently set an upward optical wavelength by no means of an OLT, and thereby the method can be widely applied to the wavelength division multiplexing passive optical network technical field.

Description

technical field [0001] The invention relates to the technical field of wavelength division multiplexing passive optical network. In particular, it relates to a method for realizing uplink optical wavelength setting of a colorless optical network unit based on a tunable laser or a tunable optical transmitter in a passive optical network based on wavelength division multiplexing. Background technique [0002] The passive optical access network has become the main technology for realizing optical fiber access. The industry has established relevant standards for a series of passive optical access networks, such as GPON and EPON (where PON refers to passive optical fiber network), and deployed them commercially. These solutions adopt TDM (Time Division Multiplexing, time division multiplexing mode), and use passive remote nodes such as optical splitter / combiner between OLT (optical line terminal) and ONU (optical network unit) to realize networking. The cost is low, so it becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/572H04B10/07H04J14/02
Inventor 张治国陈雪王立芊张民贝劲松苏婕
Owner BEIJING UNIV OF POSTS & TELECOMM
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