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Outer cavity laser capable of being used as WDM-PON

A WDM-PON and laser technology, applied in the field of external cavity lasers, can solve the problems of unfavorable WDM-PON system popularization and application, high cost of light source, etc., and achieve the effects of simple structure, good stability and improved reliability

Inactive Publication Date: 2011-07-20
张哲民 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to provide an external cavity laser composed of passive devices to provide a simple and practical Realize the colorless (colorless) of the ONU / OLT light source in WDM-PON, reduce the cost of the light source, and promote the practical application of the WDM-PON system

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  • Outer cavity laser capable of being used as WDM-PON
  • Outer cavity laser capable of being used as WDM-PON
  • Outer cavity laser capable of being used as WDM-PON

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, the present invention will be further described:

[0034] figure 2 It is an improved WDM-PON system structure utilizing the light source of the present invention. An external cavity laser that can be used as a WDM-PON light source is composed of an optical line terminal (OLT), a remote node (RN), an optical network unit (ONU) and a transmission fiber, and a passive module 1 is arranged in the OLT. The RN has a passive module 2; the passive module 1 and the DWDM wavelength division multiplexer / demultiplexer 3 in the OLT and the OLT transceiver unit 5 constitute an external cavity laser, and the passive module 2 and the DWDM wavelength division multiplexer in the RN The / demultiplexer 4 and the ONU transmitting unit 6 in the ONU constitute an external cavity laser.

[0035] The passive module 1 and the passive module 2 are composed of two identical first wavelength division multiplexing devices 7, second wavelength divisi...

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Abstract

The present invention relates to an external cavity laser based on semi-conductor gain medium as a WDM-PON, composed of an optical line terminal (OLT), a remote node (RN), an optical network unit (ONU) and fiber-optic transmission components, wherein, a passive module 1 is provided in the OLT, and a passive module 2 is provided in the RN; an external cavity laser is composed of the passive module 1, an DWDM wavelength-division multiplexer / demultiplexer 3 in the OLT and an OLT transceiver unit 5; and another external cavity laser is composed of the passive module 2, an DWDM wavelength-division multiplexer / demultiplexer 4 in the RN and an ONU emission unit 6 in the ONU. The light source adopted by the invention uses a module composed of passive devices to substitute expensive active deviceto realize the same function, which can greatly improve the reliability of the system and has reduced system cost, simple structure, easy and reliable use.

Description

Technical field [0001] The invention belongs to the technical field of wavelength division multiplexing passive optical network (WDM-PON), and in particular relates to an external cavity laser based on a semiconductor gain medium that can be used as a WDM-PON light source. Background technique [0002] At present, the passive optical network (PON) is the most attractive technology to solve the "last mile" of the access network and realize FTTX. According to the signal distribution method, PON can be divided into power division passive optical network (PS-PON) and wavelength division multiplexing passive optical network (WDM-PON). At present, APON, BPON, EPON, and GPON all belong to PS-PON. WDM-PON is the application of wavelength division multiplexing technology in PON. The optical wavelength division multiplexer concentrates the multi-wavelength signals sent by the optical line terminal (OLT) into one optical fiber and transmits them to the remote node (RN). The optical w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04B10/12H01S3/00
Inventor 张哲民原辉赖薇
Owner 张哲民