OPTICAL MEASUREMENT SYSTEM
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Jan 4, 2023
filing date -
Jan 4, 2023
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Abstract
The invention provides an optical measurement system for performing a combination of Distributed Acoustic Sensing (DAS), Distributed Temperature Sensing (DTS), and/or Distributed Strain and Temperature Sensing (DSTS) on a same optical path (e.g. an optical fibre). The optical system comprises a coherent light source configured to generate a light signal, a launch stage configured to receive the light signal from the light source and generate a pulsed test signal and launch the test signal along an optical path, and a local oscillator stage configured to generate a local oscillator signal. A first detector stage is configured to receive the local oscillator signal and a scattered signal from the optical path, and to interfere the local oscillator signal with the scattered signal.
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