Abstract

A method of measuring strain over 30-cm intervals to an accuracy of 10 microstrain in unaltered low-loss communications-grade single-mode optical fiber is presented. The method uses a tunable external cavity diode laser to measure the reflected intensity of a reflector–fiber system as a function of wavelength. This measurement is performed with no strain applied to the fiber to produce a reference and then again after a strain has been induced. Cross correlation of the Rayleigh scatter spectra from a selected section of fiber in the strained and unstrained states determines the spectral shift resulting from the applied strain.

© 1998 Optical Society of America

Distributed measurement of static strain in an optical fiber with multiple Bragg gratings at nominally equal wavelengths

Mark Froggatt and Jason Moore
Appl. Opt. 37(10) 1741-1746 (1998)

High spatial resolution distributed fiber strain sensor based on phase-OFDR

Jiong Li, Jiulin Gan, Zhishen Zhang, Xiaobo Heng, Changsheng Yang, Qi Qian, Shanhui Xu, and Zhongmin Yang
Opt. Express 25(22) 27913-27922 (2017)

Phase-based, high spatial resolution and distributed, static and dynamic strain sensing using Brillouin dynamic gratings in optical fibers

Arik Bergman, Tomi Langer, and Moshe Tur
Opt. Express 25(5) 5376-5388 (2017)

Rayleigh scattering of silica core optical fiber after heat treatment

Shigeki Sakaguchi and Shin-ichi Todoroki
Appl. Opt. 37(33) 7708-7711 (1998)

Temperature-strain discrimination in distributed optical fiber sensing using phase-sensitive optical time-domain reflectometry

Xin Lu, Marcelo A. Soto, and Luc Thévenaz
Opt. Express 25(14) 16059-16071 (2017)