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Electro-optically tunable external cavity mirror for a narrow linewidth semiconductor laser

  • US 6,041,071 A
  • Filed: 09/27/1996
  • Issued: 03/21/2000
  • Est. Priority Date: 09/29/1995
  • Status: Expired due to Fees
First Claim
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1. A tunable external cavity waveguide device, said waveguide device comprising:

  • a ferroelectric electro-optical substrate;

    a waveguide formed in said substrate;

    a distributed Bragg reflector (DBR) disposed adjacent a portion of said waveguide; and

    means for applying a voltage difference across said distributed Bragg reflector,wherein said substrate has an index of refraction, wherein said waveguide is formed in said substrate by inducing a strain field within said substrate, and wherein said strain field forms graduated variations in the index of refraction of said substrate without altering the chemical composition of said substrate.

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