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Folded cavity semiconductor optical amplifier (FCSOA)

  • US 7,126,750 B2
  • Filed: 07/07/2003
  • Issued: 10/24/2006
  • Est. Priority Date: 07/08/2002
  • Status: Expired due to Fees
First Claim
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1. A semiconductor optical amplifier comprising:

  • a first mirror disposed on a substrate;

    an active region consisting of an optical cavity having gain medium, said optical cavity being disposed adjacent said first mirror;

    a second mirror disposed on said active region on a surface opposite said first mirror;

    input and output portions formed in said mirrors, said input and output portions having formed layers of reduced reflectivity relative to a corresponding first or second mirror; and

    a longitudinal waveguide integral to said optical cavity connecting input and output ports, whereby said longitudinal waveguide is configured with a downward step in reflectivity at said input and output ports of the optical amplifier.

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