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ELECTRO-OPTIC PHASE MODULATOR WITH NO RESIDUAL AMPLITUDE MODULATION

  • US 20180062754A1
  • Filed: 08/26/2016
  • Published: 03/01/2018
  • Est. Priority Date: 08/26/2016
  • Status: Active Grant
First Claim
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1. An optical phase modulator, comprising:

  • an input port, configured to receive a light source;

    an output port configured to provide a phase modulated output signal based on the received light source;

    a first optical coupler coupled to the input port and configured to split the light source into a first optical path of a Mach Zehnder Interferometer (MZI) and a second optical path of the MZI;

    a static phase shifter in the first optical path;

    a phase modulator in the second optical path; and

    a second optical coupler coupled to the output port and configured to combine the first optical path and the second optical path,wherein the first and second optical couplers are adjusted such that the phase modulated optical signal at the output port provides a substantially constant amplitude that is independent of an insertion loss variation introduced by the phase modulator.

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