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Passband flattening of integrated optical filters

  • US 5,629,992 A
  • Filed: 09/14/1995
  • Issued: 05/13/1997
  • Est. Priority Date: 09/14/1995
  • Status: Expired due to Term
First Claim
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1. An optical coupler, comprising:

  • a plurality of single-moded optical waveguides optically connected to at least one optical interaction region; and

    at least one multi-mode interference filter disposed between a respective one of said single-moded optical waveguides and said interaction region and having a length to produce a multiple image at an end thereof.

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