Abstract

The attenuation of optical power in a graded-index multimode fiber subjected to periodic microdistortions has been measured. The noncommunication fiber (designated the sensor fiber) had a small numerical aperture and a large core diameter, resulting in a large coupling wavelength and an enhanced sensitivity to microdistortion forces. The linewidth of the fundamental attenuation peak is in excellent agreement with that predicted by theory without the need to introduce a correlation length. The amplitude and force dependence of the attenuation measured at the fundamental peak is also in excellent agreement with theory. The inferred distortion force versus distortion amplitude curve is a straight line, as predicted by elasticity theory.

© 1985 Optical Society of America

Fiber-optic microbend sensors: sensitivity as a function of distortion wavelength

M. B. J. Diemeer and E. S. Trommel
Opt. Lett. 9(6) 260-262 (1984)

Auto-correction method for differential attenuation in a fiber-optic distributed-temperature sensor

Kwang Suh and Chung Lee
Opt. Lett. 33(16) 1845-1847 (2008)

Power loss, modal noise and distortion due to microbending of optical fibers

Santanu Das, Colin G. Englefield, and Paul A. Goud
Appl. Opt. 24(15) 2323-2334 (1985)

Optical fiber sensor based on differential spectroscopic absorption

A. Safaai-Jazi, C. K. Jen, and G. W. Farnell
Appl. Opt. 24(15) 2341-2345 (1985)

Optical fiber long-period grating sensors

Vikram Bhatia and Ashish M. Vengsarkar
Opt. Lett. 21(9) 692-694 (1996)