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Holographic optical isolator utilizing opto-electronic transmitter and receiver disposed in a package

  • US 5,500,912 A
  • Filed: 05/02/1995
  • Issued: 03/19/1996
  • Est. Priority Date: 05/02/1995
  • Status: Expired due to Fees
First Claim
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1. An optical isolator comprising:

  • a first leadframe portion and a second leadframe portion, wherein said first leadframe portion and said second leadframe portion are electrically isolated and disposed in a substantially common plane;

    an opto-electronic transmitter disposed on said first leadframe portion;

    a first opto-electronic receiver disposed on said second leadframe portion;

    a planar optical waveguide having a top surface and a bottom surface, wherein said bottom surface is disposed on said transmitter and said first opto-electronic receiver;

    a first holographic element disposed on said top surface of said optical waveguide and aligned with said transmitter so that a beam of light emitted from said transmitter is reflected by said first holographic element into said optical waveguide;

    a second holographic element disposed on said bottom surface of said optical waveguide and aligned relative to said first holographic element so that said beam of light is reflected by said second holographic element into said optical waveguide;

    a third holographic element disposed on said top surface of said optical waveguide and aligned relative to both said second holographic element and said first opto-electronic receiver so that said beam of light is reflected by said third holographic element onto said first opto-electronic receiver; and

    a package encapsulating at least said first leadframe portion, said second leadframe portion, said transmitter, and said first opto-electronic receiver.

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