3 January 1986 Heterodyne Interferometric Temperature Sensor Using a Transverse Zeeman Laser and a Polarization Maintaining Fiber
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Abstract
A new fiber-optic temperature sesnor using a polarization maintaining fiber and a transverse Zeeman laser based on heterodyne interferometry has been developed. The temperature variation is detected by coupling two orthogonal linear polirization components of a laser beam, each differently phase-modulated during transmitting a birefringent single-mode polarization maintaining fiber. A transverse He-Ne Zeeman laser was developed to achieve heterodyning demodulation of the phase-shift caused by the temperature of the fiber. Experimental result demonstrates that this sensor has the temperature resolution of 0.0032°C with a very wide dynamic range. Besides, this fiber sensor has the advantages of simple construction and ruggedness against pressure turbulence.
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S. Kawata, S. Kawata, T. Shigeoka, T. Shigeoka, T. Okamoto, T. Okamoto, S. Minami, S. Minami, } "Heterodyne Interferometric Temperature Sensor Using a Transverse Zeeman Laser and a Polarization Maintaining Fiber", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); doi: 10.1117/12.949805; https://doi.org/10.1117/12.949805
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