11 October 1989 An Interferometric Thermal Detector
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A novel infrared detection system is presented. A responsivity of 35 fringes per Watt and a time constant of approximately 220 milliseconds were measured at room temperature for a fiber optic interferometric thermal detector (ITD). These mea-surements 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 D* of about 7X108 centimeter - root Hertz per Watt is predicted by the model. Finally, the performance of alternate ITD designs is discussed.
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Steven E. Hodges, Mark T. Kern, Kwangjai Park, "An Interferometric Thermal Detector", Proc. SPIE 1107, Infrared Detectors, Focal Plane Arrays, and Imaging Sensors, (11 October 1989); doi: 10.1117/12.960661; https://doi.org/10.1117/12.960661

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