Eight-channel full fiber coarse wavelength-division multiplexer/demultiplexer

A demultiplexer and wavelength division multiplexing technology, which is applied in the field of photonic systems in optical communication technology, can solve the problems of high optical difficulty and low coupling efficiency, and achieves good working stability, low cost and good scalability. Effect

CN1545238AInactive Publication Date: 2004-11-10SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2004-11-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to 8-channel full-optical fiber coarse wavelength division multiplexer / demultiplexer, adopting a wavelength division multiplexing unit made by fused biconic taper (FBT) technique as a basic unit, using cascade mode to synthesize seven wavelength division multiplexing units at different working wavelength into a 20nm-space 8-channel three-stage full-optical fiber coarse wavelength division demultiplexer, which has an input port and 8 output ports, the lights of two branched channels of each unit are periodically distributed and compensatory. Reverse the demultiplexer as a coarse wavelength division multiplexer with 8 reverse input ports and 1 output port. It is easy to construct and little influenced by environmental temperature and humidity, and has low cost, good working stability and very good expandability, and can increase communication capacity for the same network, meeting the demands of current communication service on bandwidth.
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Description

Technical field:

[0001] The invention relates to an eight-channel all-fiber coarse wavelength division multiplexing / demultiplexing device, which is an important passive device in an optical fiber communication coarse wavelength division multiplexing system, and belongs to the field of photonic systems in optical communication technology. Background technique:

[0002] In recent years, the business traffic on the telecommunication network has been increasing continuously, requiring the network to provide wider and wider bandwidths. In order to meet the bandwidth requirements of communication services, many countries in the world use Dense Wavelength Division Multiplexing (DWDM) technology to expand the capacity of laid optical fiber lines. The advantages of wide bandwidth, transparency of data transmission and successful application in long-distance backbone network make DWDM an ideal network transmission platform. However, due to its high cost, dense wavelength division mul...

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and embodiment the technical scheme of the present invention will be further described:

[0017] Such as figure 1 As shown, the eight-channel all-fiber coarse wave division multiplexer includes seven fused tapered wavelength division multiplexing units. Among them, unit 1 is a fused tapered wavelength division multiplexer unit with a first-stage channel interval of 20nm and a specific working wavelength, and units 2 and 3 are two fused tapered tapered second-stage corresponding working wavelengths with a channel interval of 40nm. The wavelength division multiplexer units, units 4, 5, 6 and 7 are four third-level fused tapered wavelength division multiplexer units corresponding to the working wavelength and channel spacing of 80nm. The input terminals of units 2 and 3 are respectively connected to the two output branches of unit 1, and the input terminals of units 4, 5, 6 and 7 are connected to the four output terminals of ...