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Low-noise and high bandwidth electric field sensing with silicon-polymer integrated photonics and low drive voltage modulator fiber-based antenna link

  • US 8,909,003 B1
  • Filed: 01/19/2010
  • Issued: 12/09/2014
  • Est. Priority Date: 01/16/2009
  • Status: Expired due to Fees
First Claim
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1. An electric field sensor device comprising:

  • a radio frequency (RF) antenna configured to receive an RF signal;

    an optical splitter having a first input and a second input, wherein an output of the optical splitter is coupled to an input of a balanced photodetector;

    a first voltage modulator having an input electrically coupled to said RF antenna, said first voltage modulator including;

    a first slot waveguide, the first slot waveguide comprising;

    a first plurality of silicon strips defining at least one first slot;

    a first cladding comprising an electrooptic polymer;

    a first light input; and

    a first modulated light output coupled to the first input of the optical splitter; and

    a second voltage modulator having an input electrically coupled to said RF antenna, said second voltage modulator including;

    a second slot waveguide, the second slot waveguide comprising;

    a second plurality of silicon strips defining at least one second slot;

    a second cladding comprising an electrooptic polymer;

    a second light input; and

    a second modulated light output coupled to the second input of the optical splitter,wherein said first slot waveguide is configured to provide a first optical output signal at said first modulated light output having a first optical parameter indicative of an electric field at said RF antenna, and wherein the first modulated light output corresponds to an enhanced electric field associated with an optical mode of the first slot,wherein said second slot waveguide is configured to provide a second optical output signal at said second modulated light output having a second optical parameter indicative of an electric field at said RF antenna, and wherein the second modulated light output corresponds to an enhanced electric field associated with an optical mode of the second slot, andwherein said balanced photodetector has an RF output terminal and said balanced location physically remote from said RF antenna, and said RF output signal is responsive to the RF signal received at said RF antenna.

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