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Common path heterodyne optical fiber sensors

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4 Author(s)
Yoshino, T. ; Dept. of Electron. Eng., Gunma Univ., Japan ; Hashimoto, T. ; Nara, M. ; Kurosawa, K.

The common path type of differential heterodyne fiber-optic sensing scheme has been developed. It uses a polarization maintaining fiber as either a sensor or an optical lead and a dual-frequency dual-polarization laser beam. The sensing schemes are applied to the measurements of temperature, strain, force, pressure, rotation rate (gyro), magnetic and electric fields, and thin film thickness. The sensing scheme and main performances for each measurand are described. High precision and high stability as well as good linearity for each measurand are demonstrated

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Lightwave Technology, Journal of  (Volume:10 ,  Issue: 4 )