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Tunable optical filters having electro-optic whispering-gallery-mode resonators

  • US 20050128566A1
  • Filed: 02/03/2004
  • Published: 06/16/2005
  • Est. Priority Date: 02/03/2003
  • Status: Active Grant
First Claim
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1. A method for filtering an optical signal, comprising:

  • directing an input optical signal into an optical resonator configured to support whispering gallery modes and comprising a portion where the whispering gallery modes are present, wherein at least the portion of the optical resonator exhibits an electro-optical effect;

    coupling light out of the optical resonator to produce a filtered optical output from the input optical signal; and

    applying an electrical control signal to at least the portion in the optical resonator to tune a spectral transmission peak of the optical resonator and thus to select spectral components in the input optical signal in the filtered optical output.

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