Abstract
The interaction of a large temperature-dependent refractive index and a temperature-dependent absorption of semiconductor materials at can be used to build a very sensitive, film coated fiber-optic temperature probe. We developed a sensor model for the optical fiber-germanium film sensor. A temperature sensitivity of reflectivity change of , corresponding to considering a moderate signal processing system, over within the temperature regime of to , has been demonstrated by experimental tests of the novel sensor. The potential sensitivity and further applications of the sensor are discussed.
© 2011 Optical Society of America
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