Stable nonlinear Mach-Zehnder fiber switch

  • US 5,920,666 A
  • Filed: 12/30/1997
  • Issued: 07/06/1999
  • Est. Priority Date: 01/02/1997
  • Status: Expired due to Fees
First Claim
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1. An optical switch comprising:

  • a first optical coupler which receives an optical signal and a pump signal as inputs and which provides first and second coupled outputs;

    a first optical waveguide in optical communication with said first coupled output, said first optical waveguide having a first portion of said optical signal propagating therethrough;

    a second optical waveguide in optical communication with said second coupled output, said second optical waveguide having said pump signal and a second portion of said optical signal propagating therethrough, said first optical waveguide and said second optical waveguide having lengths sufficiently short to be thermally stable, said second optical waveguide further having a sufficient nonlinearity to produce a relative phase shift difference of said second portion of said optical signal with respect to said first portion of said optical signal of 180°

    with low pump power; and

    a second optical coupler which receives said first and second optical waveguides as inputs and which provides first and second output ports.

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