Title :
Common path heterodyne optical fiber sensors
Author :
Yoshino, Toshihiko ; Hashimoto, Takaharu ; Nara, Makoto ; Kurosawa, Kiyoshi
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Japan
fDate :
4/1/1992 12:00:00 AM
Abstract :
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
Keywords :
demodulation; fibre optic sensors; light polarisation; optical modulation; accuracy; common path; differential heterodyne fiber-optic sensing scheme; dual-frequency dual-polarization laser beam; electric fields; force; good linearity; gyro; heterodyne optical fiber sensors; high precision; high stability; magnetic fields; measurand; optical lead; polarization maintaining fiber; pressure; rotation rate; strain; temperature; thin film thickness; Force measurement; Magnetic field measurement; Magnetic sensors; Optical fiber polarization; Optical fiber sensors; Optical films; Optical mixing; Optical sensors; Strain measurement; Temperature measurement;
Journal_Title :
Lightwave Technology, Journal of
