This paper describes the design and testing of an embedded fiber optic sensor with high sensitivity and broadband response. The sensing principle is based on the observation of stress-induced birefringence in an optical fiber embedded in a flat panel. The sensor was designed to measure low-level stresses in sea ice, however, the sensing principle and measurement techniques presented here have general application for embedded stress and pressure sensors.
Jack J. Kolle,
Roger F. Johnson,
"Embedded polarimetric differential stress sensor", Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); doi: 10.1117/12.169950; https://doi.org/10.1117/12.169950