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N-port reconfigurable DWDM multiplexer and demultiplexer

  • US 6,137,927 A
  • Filed: 12/18/1998
  • Issued: 10/24/2000
  • Est. Priority Date: 01/16/1998
  • Status: Expired due to Fees
First Claim
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1. A monolithic optical device for wavelength division multiplexing or demultiplexing a plurality of light signals, each of said plurality of light signals is characterized by a wavelength or a plurality of wavelengths and a signal light power, said optical device comprising:

  • a first evanescent wave coupler having M exterior ports and N interior ports, wherein the signal light power is uniformly coupled between said M exterior ports and said N interior ports;

    a second evanescent wave coupler having N interior ports and O exterior ports, wherein the signal light power is uniformly coupled between said N interior ports and said O exterior ports;

    N optical paths for connecting each of said N interior ports of said first evanescent coupler, respectively, to a corresponding one of said N interior ports of said second evanescent coupler; and

    ,a plurality of wavelength selecting elements disposed on each of said N optical paths for routing each of the plurality of light signals to any selected M exterior port or O exterior port on the basis of the wavelength or the plurality of wavelengths.

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