Patent ID: 10955617

Abstract:
A high-resolution photonic thermometer article performs high-resolution thermometry and includes: a light source; a photonic thermometer with a waveguide and a photonic crystal cavity that stores light; a photodetector in communication with the photonic thermometer; a phase sensitive detector in communication with the photodetector and that: receives the photodetector signal from the photodetector; receives a reference frequency signal; and produces a lock signal from the photodetector signal, based on the reference frequency signal; a local oscillator in communication with the phase sensitive detector and that produces the reference frequency signal; and a servo controller in communication with the phase sensitive detector and local oscillator and that: receives the lock signal from the phase sensitive detector; receives the reference frequency signal from the local oscillator; and produces the control signal such that absorption power of the photonic crystal is maximized through wavelength control of the light source by the control signal.