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Variable wavelength-based hybrid optical access system

An access system and hybrid optical technology, which is applied in the field of optical communication, can solve problems such as not being able to meet HPON, achieve the effect of solving inventory costs and maintenance costs, meeting bandwidth and speed requirements, and solving the shortage of optical fiber resources

Inactive Publication Date: 2010-09-08
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, the colorless based on broad-spectrum segmentation and the colorless based on RSOA wavelength reuse technology cannot meet the needs of HPON.

Method used

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  • Variable wavelength-based hybrid optical access system
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  • Variable wavelength-based hybrid optical access system

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] Such as figure 2 , 3 As shown, the hybrid optical access system based on the variable wavelength of the present invention is an HPON system based on a tunable laser. According to the different structure of the OLT, it is divided into two types of HPON systems, both of which include OLTs connected by optical fiber lines. part, RN part and ONU part, on the OLT side of the local end, there are two implementation methods for the sending end of the colorless optical module, that is, the injection locking method with a seed light source (see figure 2 ), tunable laser mode without seed light source or fixed laser (see image 3 ), the internal receiving end Rx of the optical transceiver module TRX adopts a PIN or APD device. Among them, the OLT part includes:

[0028] For several optical transceiver modules TRX, the WDM device inside the TRX separates th...

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Abstract

The invention discloses a variable wavelength-based hybrid optical access system, which comprises an optical line terminal (OLT) part, a remote node (RN) part and an optical network unit (ONU) part connected together through an optical fiber circuit, wherein the OLT part comprises a plurality of optical transceiver modules TRX; when an injection-locked Fabry-Perot laser diode (FP-LD) or reflection semiconductor optical amplifier (RSOA) is adopted at the transmitting end Tx of each optical transceiver module TRX, the common end of a first wave multiplexer / de-multiplexer MUX / DEMUX1 is connected with a light source SL through a wavelength division multiplexed (WDM) component and the output end of the WDM component is connected with the optical fiber circuit; or when a fixed wavelength laser or adjustable wavelength laser is used at the transmitting end Tx of the optical transceiver module, the common end of the first wave multiplexer / de-multiplexer MUX / DEMUX1 is connected with the optical fiber circuit directly. The variable wavelength-based hybrid optical access system of the invention can adapt to the network deployment of each operator so as to realize smooth updating of the network structure, solve the problems of the shortage of the optical fiber resource, the inventory cost and the maintenance cost and meet the requirements on the bandwidth and speed.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to the technical field of hybrid optical passive access optical network, in particular to a hybrid optical access system based on variable wavelength. Background technique [0002] In recent years, with the continuous and rapid development of the Internet, various new services emerge in an endless stream, making people's demand for network access bandwidth continue to increase, especially online games, conference TV, video on demand and other services, so that traditional access methods will not be able to meet bandwidth requirements. According to relevant data analysis, the average bandwidth demand of users will exceed 10Mbit / s in the next three years. Compared with other wired and wireless access technologies, optical fiber access has unparalleled advantages in terms of bandwidth capacity and coverage distance. With the emergence and rapid maturity of low-cost PON ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00
Inventor 王素椅张傲曹桦侯景元黄川王新柱汪灵杰王小春
Owner FENGHUO COMM SCI & TECH CO LTD
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