High temperature and high dynamic bandwidth photonic sensor for gas flow rate, temperature, and pressure measurement

A sensor system, comprising:

• a pulsed light source operative to emit light pulses at a selected wavelength;
• a passive sensor head chip in optical communication with the pulsed light source, the passive sensor head chip including a first photonics substrate and comprising:
• a transmitting optical component on the first photonics substrate and optically coupled to a first optical fiber, the transmitting optical component configured to couple a light pulse, transmitted through the first optical fiber from the pulsed light source, into a region of interest;
• and
• a receiving optical component on the first photonics substrate and optically coupled to a second optical fiber, the receiving optical component configured to couple backscattered light, received from the region of interest, into the second optical fiber;
• and
• a signal processing chip in optical communication with the passive sensor head chip and the pulsed light source, the signal processing chip including a second photonics substrate and comprising:
• a passive optical filter array on the second photonics substrate, the passive optical filter array configured to receive the backscattered light from the second optical fiber and a reference pulse from the pulsed light source, wherein the passive optical filter array includes:
• a plurality of optical notch filters in optical communication with each other, the optical notch filters operative for frequency selection;
• and
• a plurality of optical detectors each respectively coupled to an output of one of the optical notch filters;
• wherein the passive optical filter array is operative to perform frequency spectrum decomposition of the received backscattered light into a plurality of signals used for data extraction and processing to determine one or more parameters of a gas in the region of interest.