Patent ID: 11906368
Assignee: FLUKE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A temperature measurement system on a chip, comprising:
an optical signal generator configured to generate an input optical signal at a predetermined wavelength;
an interferometer that includes:
a beam splitter configured to split the input optical signal into a first beam and a second beam;
a first arm coupled to the beam splitter to receive and optically transmit the first beam;
a second arm coupled to the beam splitter to receive and optically transmit the second beam, wherein the second arm introduces a phase shift in the second beam relative to the first beam to produce a phase-shifted second beam; and
a beam combiner coupled to the first arm and the second arm, wherein the beam combiner is configured to receive the first beam and the phase-shifted second beam and combine at least a portion of the first beam and the phase-shifted second beam to produce an output optical signal;

an optical signal detector coupled to the beam combiner, wherein the optical signal detector is configured to measure an optical signal intensity of the output optical signal and produce a measured optical signal intensity of the interferometer;
a reference arm through which at least a portion of the input optical signal is transmitted to produce a reference output optical signal; and
an optical signal detector coupled to the reference arm to receive the reference output optical signal and measure an optical signal intensity of the reference output optical signal to produce a measured optical signal intensity of the reference arm,
wherein the measured optical signal intensity of the interferometer is normalized by the measured optical signal intensity of the reference arm to produce a normalized measured optical signal intensity of the interferometer; and
a processor configured to correlate the normalized measured optical signal intensity of the interferometer with a temperature.