A dual-grating sensor head, which was designed for temperature-insensitive strain measurement, was used to measure fast-varying strain perturbations. Using a Mach-Zehnder interferometer technique, we obtained ~0.1-με (microstrain) rms resolution with a 200-Hz strain input. The feasibility of measuring a dynamic-strain with a static-strain measuring configuration was also demonstrated.
© 1998 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
Minho Song, Sang Bae Lee, Sang Sam Choi, and Byoungho Lee, "Dynamic-Strain Measurement with Dual-Grating Fiber Sensor," Appl. Opt. 37, 3484-3486 (1998)