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Method and apparatus for adding/droping optical signals in a semiconductor substrate

  • US 20020197012A1
  • Filed: 09/28/2001
  • Published: 12/26/2002
  • Est. Priority Date: 06/13/2001
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • splitting a first optical beam having multiple wavelengths into second and third optical beams with a first 3 db optical coupler disposed in a semiconductor substrate;

    reflecting portions of the second and third optical beams having a tunable wavelength back to the first 3 db optical coupler with first and second pluralities of silicon and polysilicon interfaces, respectively, disposed along the semiconductor substrate;

    directing portions of the second and third optical beams not reflected by the first and second pluralities of silicon and polysilicon interfaces to a second 3 db optical coupler disposed in the semiconductor substrate; and

    combining the portions of the second and third optical beams not reflected by the first and second pluralities of silicon and polysilicon interfaces into a fourth optical beam with the second 3 db optical coupler.

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