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Article comprising a wavelength-selective add-drop multiplexer

  • US 5,974,207 A
  • Filed: 12/23/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 12/23/1997
  • Status: Expired due to Term
First Claim
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1. An article operable to drop a spectral component from a first wavelength division multiplexed (WDM) signal having a plurality of spectral components, each spectral component having a different wavelength, comprising:

  • a spectral component separator having;

    a first port on a first side thereof, wherein the first WDM signal is received at said first port and demultiplexed in the spectral component separator into the plurality of spectral components;

    a second port at the first side thereof;

    a set of third ports at a second side thereof, wherein said plurality of spectral components are delivered to said third ports;

    a set of fourth ports at the second side thereof, wherein spectral components that are received at said fourth ports are multiplexed into a second WDM signal in the spectral component separator and delivered to said second port; and

    a plurality of optical switches in optical communication with the spectral component separator, each of said optical switches having;

    a first input in optical communication with one of said third ports; and

    a first output in optical communication with one of said fourth ports, wherein,in a first state, a spectral component received at said first input from said one third port is delivered to said first output, andin a second state, a spectral component received at said first input from said one third port is not delivered to said first output and is routed to a dropping device where it is dropped.

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