Real-time fiber optic interferometry controller
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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Abstract
A modular fiber optic interferometry control system and method for extracting information from superimposed waves is disclosed. The system comprises a first module for converting a radio frequency input to a multiplexed binary data stream, a second module for correlating a pseudo random number (PRN) reference with a received PRN code modulated backscattered signal, and a third module comprising control logic. In some embodiments the system further comprises one or more of a fourth module for generating a power stream, a fifth module for event interrogation, and a sixth module for noise reduction.
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20 Claims
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1. A modular fiber optic interferometry control system to extract information from superimposed waves, the system comprising:
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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 comprising at 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for extracting information from superimposed waves with a modular fiber optic interferometry control system, the method comprising:
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using a first module configured to; receive a radio frequency (RF) input comprising superimposed waves, using 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; using 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; generating a local oscillator signal using a local RF oscillator coupled to an RF splitter, wherein the RF splitter separates the local oscillator signal into two outputs, a first output is connected to the first mixer, and a second output is connected to the second mixer, outputting a multiplexed binary data stream using an analog to digital convertor (ADC) connected to the output of the first and second mixers, wherein the outputs represent a pseudo random number (PRN) code modulated backscattered signal received from a fiber under test; using a second module configured to; correlate a PRN reference with the received PRN code modulated backscattered signal, perform control operations; using a third module comprising control logic for the modular fiber optic interferometry control system configured to; store executable instructions on a computer readable memory, 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. - View Dependent Claims (18, 19, 20)
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Specification