Abstract

This paper continues previous research work dealing with the study of sensor of thermal field disturbance. The utilization of polarization maintaining fiber (PMF) birefringence high sensitivity upon the temperature is taken in advantage. The effect of laser source wavelength and optical fiber beat length upon the fiber response invoked by disturbing temperature field is theoretically analyzed. The sensitivity of optical fiber response upon the temperature disturbing is experimentally verified. The optical fibers for wavelength 633 nm and 1550 nm with its beat length 2 mm and 5 mm are used in experiment. The experimental work was conducted for different lengths of disturbing temperature radiation sources from fiber-optic sensor and for different length of sensor exposed to the radiation. The relation of fiber response for the wavelength of 633 nm upon different magnitude of disturbing temperature radiation was also investigated. The particular results of experimental work are presented in this paper. The construction of sensor system with desired sensitivity and selection of its parameters can be done based on the obtained results.

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