Dts performance improvement through variable mode path length averaging
AssigneeBaker Hughes, A Ge Company, LLC
InventorsIan Mitchell, Alexander Michael Barry, William Albert Johnston
Life of this patent
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Abstract
A system and method to determine temperature include an optical fiber and at least two pulse laser sources to transmit light pulses with at least two wavelengths into the optical fiber. The system also includes an optical path length modulator to modulate the optical path length of the optical fiber as the light pulses are transmitted into the optical fiber. At least two photodetectors detect backscatter reflected in the optical fiber, and a processor determines the temperature based on the backscatter.
Claims20
A system to determine temperature, the system comprising:
- an optical fiber;
- at least two pulse laser sources configured to transmit light pulses with at least two wavelengths into the optical fiber;
- an optical path length modulator configured to modulate the optical path length of the optical fiber as the light pulses are transmitted into the optical fiber;
- at least two photodetectors configured to detect backscatter reflected in the optical fiber;
- and
- a processor configured to determine the temperature based on the backscatter.
A method of determining temperature, the method comprising:
- generating pulses of light with at least two wavelengths for transmission into an optical fiber;
- modulating an optical path length of the optical fiber as the pulses of light are transmitted into the optical fiber;
- receiving backscatter from the optical fiber that results from reflections based on the transmission of the pulses of light into the optical fiber;
- and
- processing, using a processor, the backscatter to determine the temperature.
A method of arranging a distributed temperature sensing system to determine temperature, the method comprising:
- disposing at least two light sources to transmit light pulses with at least two wavelengths;
- arranging an optical fiber to propagate the light pulses;
- arranging an optical path length modulator to modulate the optical path length of the optical fiber as the light pulses are transmitted into the optical fiber;
- and
- configuring a processor to determine the temperature based on backscatter reflected in the optical fiber.
Dependencies are inferred from the claim text.