The testing of a fiber-optic distributed-strain sensor attached to a simple structural member is reported. A Brillouin scattering-based sensor system was used to measure both tensile and compressive strains along the length of a cantilever beam subjected to various loads. The sensing fiber was attached to the beam in such a way that some sections experienced uniform strain, whereas others were subjected to a nonuniform strain distribution. A spatial resolution of 0.4 m was used, and a measurement precision of approximately ±50 µε was achieved.
© 1999 Optical Society of America
Original Manuscript: September 29, 1998
Revised Manuscript: January 25, 1999
Published: May 1, 1999
Michael DeMerchant, Anthony Brown, Xiaoyi Bao, and Theodore Bremner, "Structural monitoring by use of a Brillouin distributed sensor," Appl. Opt. 38, 2755-2759 (1999)