Method and system for adopting colourless and nonluminous optical network units in optical access network

A technology of optical network unit and network unit, which is applied in multiplexing system selection devices, optical fiber transmission, electrical components, etc., can solve the problems of reducing RSOA working life and modulation rate, and can not realize symmetrical PON transmission, etc., to improve Transmission distance and rate, the effect of eliminating beat frequency noise

Active Publication Date: 2015-02-18
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

This kind of gain saturation reflective semiconductor optical amplifier RSOA, and let RSOA work in the gain saturation region, requires the RSOA to have a special structure like this, at the same time, the RSOA must work in the g...

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  • Method and system for adopting colourless and nonluminous optical network units in optical access network
  • Method and system for adopting colourless and nonluminous optical network units in optical access network
  • Method and system for adopting colourless and nonluminous optical network units in optical access network

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Embodiment Construction

[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0070] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity ...

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Abstract

The invention provides a method and system for adopting colourless and nonluminous optical network units in an optical access network. The method comprises the steps that a binary downlink original signal and an uplink seed signal orthorhombic with the downlink original signal are overlapped together on an optical line terminal and modulated to a light carrier, then the modulated downlink combined optical signal is transmitted to the optical network units, and the optical network units do not comprise a light source; the optical network units receive the downlink combined optical signal, the signal is processed, and the downlink original signal is obtained; a binary uplink original signal is modulated to the downlink combined optical signal through the optical network units, and the modulated uplink modulation signal is transmitted to the optical line terminal; the optical line terminal receives the uplink modulation signal from the optical network units, and then the uplink original signal is restored. The same wavelength light source is adopted in the downlink signal and the uplink signal. The downlink signal does not need to be wiped, and when the uplink signal is received, frequency beating noise caused by rayleigh scattering can be eliminated.

Description

technical field [0001] The present invention relates to an optical access method and system, in particular to a method and system for using a colorless and lightless optical network unit in an optical access network. Background technique [0002] In recent years, Passive Optical Network (PON) technology has been widely considered as the best strategy to solve broadband optical access needs due to its advantages of high bandwidth, low cost, simple maintenance, and good reliability, and has been widely used in the world. widely used in the world. The passive optical network includes three parts: Optical Line Terminal (Optical Line Terminal, OLT), Optical Division Node (Optical Division Node, ODN), and Optical Network Unit (Optical Network Unit, ONU). The entire network is a two-way optical fiber transmission system in which one OLT corresponds to multiple ONUs. Among them, the ONU is set at the user end, facing a large number of access users, so the cost is low, easy to oper...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04B10/25
Inventor 李蔚余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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