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Optical interleaver, filter cell, and component design with reduced chromatic dispersion

A technology for optical components and filters, applied in the field of optical interleavers, filters and components used in optical fiber communication networks, can solve the problems of large dispersion, dispersion, manufacturing accuracy and cost of thin film filters.

Inactive Publication Date: 2005-12-14
FINISAR SHANGHAI INC
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Multilayer thin-film filters can be used optically to construct optical filters, but they are undesirable because of the number of layers used for narrow channel spacing, manufacturing precision associated with increasingly narrow bandpass requirements and cost increase
Also, as channel spacing decreases, dispersion becomes a major issue
Especially for a channel spacing of 50GHz, the dispersion of thin-film filters is so large that it cannot be used for 0C-192 signals (10Gbit / sec). Mach-Zehnder interferometers have been widely used, but they have a strong wavelength-dependent transmission sinusoidal response with a narrow rejection band

Method used

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  • Optical interleaver, filter cell, and component design with reduced chromatic dispersion
  • Optical interleaver, filter cell, and component design with reduced chromatic dispersion
  • Optical interleaver, filter cell, and component design with reduced chromatic dispersion

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Embodiment Construction

[0042] The present invention provides various optical interleavers, filter units and optical components for telecommunications and other applications, generally including optical multiplexers / demultiplexers and optical routers. An exemplary optical interleaver embodiment includes optical processing circuits capable of achieving multi-level performance characteristics using a single physical filtering stage. The optical processing on the unit segment and the second segment of the loop utilizes dispersion compensation on the first segment and the second segment to improve the integrity of the optical signal.

[0043] figure 1 is a hardware block diagram of one embodiment of an optical interleaver 100 having an optical processing loop 130, 162, 132 formed by a single stage 104 optically coupled to a splitter / combiner 150 and a feedback reflector 160 . As used in this application, an optical splice should be broadly construed to include the passage of an optical signal directly ...

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Abstract

An optical interleaver for use in telecommunications applications includes an optical multiplexer / demultiplexer and an optical router, the optical device including optical processing circuitry capable of achieving multi-level performance characteristics using a single physical filtering stage. The optical processing is asymmetrical on the first and second segments of the loop, thereby improving the integrity of the optical signal by compensating for dispersion on the first and second segments. A basic filter unit within the interleaver filters the optical signal propagating on each of the two segments of the optical circuit intersected by the filter unit.

Description

[0001] related application [0002] This application is a continuation-in-part of Application No. 10 / 170,055, filed June 12, 2002, entitled "METHOD ANDAPPARATUS FOR AN MULTIPLEXER AND DEMULTIPLEXER WITH AN OPTICAL PROCESSING LOOP," which is hereby incorporated by reference in its entirety introduce. technical field [0003] The present invention relates to optical interleavers, filters and components, and more particularly to optical interleavers, filters and components for use in optical fiber communication networks. Background technique [0004] The Synchronous Optical Network (SONET) standard defines a hierarchy of multiplexing levels and standard protocols, allowing the efficient use of wide bandwidth optical cables, while providing means for incorporating low level DS0 and DS1 signals into a common medium. Currently, optical communications are implemented using a technique known as "Wavelength Division Multiplexing" (WDM), in which modulation of each of those user data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02
Inventor 杜腾达张大鹏
Owner FINISAR SHANGHAI INC
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