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Demultiplexer/multiplexer with a controlled variable path length device

  • US 6,766,074 B1
  • Filed: 08/15/2001
  • Issued: 07/20/2004
  • Est. Priority Date: 08/15/2001
  • Status: Expired due to Fees
First Claim
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1. An optical device to receive an input optical signal having one or more wavelengths, said device comprising:

  • (a) a beam distribution element to receive the input optical signal and distribute it into a plurality of beams;

    (b) a variable path length element to receive the plurality of beams from the beam distribution element, wherein the variable path length element comprises a plurality of path sections, wherein a length of at least one of said path sections is variable; and

    (c) a beam interaction element to receive the plurality of beams from the variable path length element, wherein the plurality of beams interact in the beam interaction element.

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