Abstract
A single-ended, all-fiber polarimetric strain sensor with wide dynamic range and linearized response is described. Linear response is achieved by using a dual-wavelength technique, with modified pseudoheterodyne signal recovery. Single-valued, multiple-fringe phase tracking is obtained by using a binary signal division technique. An average strain sensitivity of 0.050 ± 0.02 deg μ∊−1 cm−1 is found for sensors that are surface adhered to cantilever beams. The sensor system is applied successfully to the measurement of the local orientation of a 1-m structural beam, with an accuracy of ±0.02 deg of beam slope. Limitations on the applicability of this sensing technique are discussed.
© 1992 Optical Society of America
Full Article | PDF ArticleMore Like This
N. Fürstenau, W. Schmidt, and H.-C. Goetting
Appl. Opt. 31(16) 2987-2993 (1992)
Markus Schmidt, Norbert Fürstenau, Wojtek Bock, and Waclaw Urbanczyk
Opt. Lett. 25(18) 1334-1336 (2000)
Norbert Fürstenau, Markus Schmidt, Wojtek J. Bock, and Waclaw Urbanczyk
Appl. Opt. 37(4) 663-671 (1998)