High temperature and high dynamic bandwidth photonic sensor for gas flow rate, temperature, and pressure measurement
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United States of America Patent
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Sep 13, 2022
Grant Date -
Mar 18, 2021
app pub date -
Sep 12, 2019
filing date -
Sep 12, 2019
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Abstract
A sensor system comprises a pulsed light source, and a passive sensor head chip in communication with the light source. The sensor head chip includes a first photonics substrate, a transmitting optical component on the first photonics substrate and configured to couple a pulse, transmitted through a first optical fiber from the light source, into a region of interest; and a receiving optical component on the first photonics substrate and configured to couple backscattered light, received from the region of interest, into a second optical fiber. A signal processing chip communicates with the sensor head chip and light source. The signal processing chip includes a second photonics substrate and comprises a passive optical filter array that receives the backscattered light from the second optical fiber. The filter array includes notch filters in communication with each other and operative for frequency selection; and optical detectors respectively coupled to the notch filters.
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