An interferometric thermal detector

Details An interferometric thermal detector An interferometric thermal detector

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1107..164h&link_type=abstract

IN: Infrared detectors, focal plane arrays, and imaging sensors; Proceedings of the Meeting, Orlando, FL, Mar. 30, 31, 1989 (A90

Physics

Optics

Fiber Optics, Helium-Neon Lasers, Infrared Detectors, Mach-Zehnder Interferometers, Beam Splitters, Calibrating, Phase Shift

Scientific paper

A novel infrared detection system is presented. A responsivity of 35 fringes/W and a time constant of approximately 220 millisec were measured at room temperature for this fiber-optic interferometric thermal detector (ITD). These measurements compare well with predictions based on a thermal model of the sensor. Except for microphonics, the device was noiseless to the limit of measurement; a room temperature responsivity of about 70 million centimeter-root Hz/W is predicted by the model. Finally, the performance of alternative ITD designs is discussed.

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