Abstract

A new fiber-optic pressure sensor is described that has high immunity to the effects of fiber-loss variations. This device uses the photoelastic effect to modulate the proportion of the light from each of two input fibers that is coupled into each of two output fibers. This four-fiber link permits two detectors to be used to measure the sensor’s responses to the light from each of two independently controlled sources. These four detector outputs are processed to yield a loss-compensated signal that is a stable and sensitive pressure indicator.

© 1987 Optical Society of America

Loss-compensated photoelastic fiber optic pressure sensor

G. Martens, J. Kordts, and G. Weidinger
Appl. Opt. 28(23) 5149-5152 (1989)

Loss-compensation technique for fiber-optic sensors and its application to displacement measurements

Glenn Beheim
Appl. Opt. 26(3) 452-455 (1987)

Multimode fiber-optic pressure sensor based on the photoelastic effect

W. B. Spillman
Opt. Lett. 7(8) 388-390 (1982)

Compensation of soliton broadening in nonlinear optical fibers with loss

Kazuhito Tajima
Opt. Lett. 12(1) 54-56 (1987)

High-resolution photoelastic pressure sensor using low-birefringence fiber

A. Bertholds and R. Dändliker
Appl. Opt. 25(3) 340-343 (1986)