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Real-time fiber optic interferometry controller

  • US 9,772,238 B2
  • Filed: 08/27/2015
  • Issued: 09/26/2017
  • Est. Priority Date: 08/28/2014
  • Status: Active Grant
First Claim
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1. A modular fiber optic interferometry control system to extract information from superimposed waves, the system comprising:

  • a first module comprising a radio frequency (RF) input comprising superimposed waves from at least one photo diode,a first amplifier connected to a first programmable attenuator, wherein the first programmable attenuator is connected to a first mixer, operable to condition the RF input;

    a second amplifier connected to a second programmable attenuator, wherein the second programmable attenuator is connected to a second mixer, operable to condition the RF input;

    a local RF oscillator coupled to an RF splitter, wherein the RF splitter generates two outputs, wherein a first output of the two outputs is connected to the first mixer, and a second output of the two outputs is connected to the second mixer,an analog to digital convertor (ADC) connected to an output of the first mixer and an output of the second mixer, wherein the outputs represent a pseudo random number (PRN) code modulated backscattered signal received from a fiber under test, and where the ADC output is a multiplexed binary data stream;

    a second module comprisingat least one shift register correlator to correlate a PRN reference with the received PRN code modulated backscattered signal,a processor to packetize and control communication;

    a third module comprising control logic for the modular fiber interferometry controller, wherein the control logic includes a computer readable memory having executable instructions stored thereon, wherein the instructions, when executed by one or more processors, cause the one or more processors to perform operations comprising at least one of data logging, communications, memory management, and light source management.

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