Exploration Of The Monocrystalline Silicon Absorption Optical Fiber Temperature Sensor

A new kind of semiconductor absorption fiber-optic temperature sensor is described in the paper. The temperature sensor based on the absorption properties of an indirect semiconductor. In particular,we analyze the temperature-dependent absorption associated with the 1.1 eV fundamental indirect band gap of single-crystal silicon. Theoretically,a wide temperature range is possible. Further more,silicon is advantageous as the material of industrial temperature sensors,since its fabrication and processing techniques are well known. A novel method that get a 10um-20um layer of single-crystal silicon as the temperature sensitive material and design transmitted configuration is presented. The linearity of about 1.5% and the sensitivityof about 1 mV/C were obtained in the temperature range from 10C to 100C.