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Fast attenuator

  • US 6,462,858 B1
  • Filed: 02/15/2001
  • Issued: 10/08/2002
  • Est. Priority Date: 02/15/2001
  • Status: Expired due to Fees
First Claim
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1. An optical attenuator comprising:

  • an input port and an output port;

    a deformable membrane having a reflective surface disposed to reflect light launched from the input port substantially towards the output port, the membrane supported by a frame having a radially symmetric opening; and

    deforming means for controllably deflecting the membrane into the opening such that the reflective surface forms a concave mirror having a concavity that determines the optical coupling efficiency between the input and output ports.

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