A novel technique of using a 1 × <i>N</i> star fiber optic coupler as a distributed strain sensor in a white-light interferometer to measure the distribution of strain is presented. The measuring principle and 1 × 4 star coupler with four fiber optic strain sensors are demonstrated. The experiment is performed with four sensors attached to a combination plastic specimen.
© 1998 Optical Society of America
Libo Yuan and Limin Zhou, "1 × N star coupler as a distributed fiber-optic strain sensor in a white-light interferometer," Appl. Opt. 37, 4168-4172 (1998)