Fiber Bragg sensors interrogation based on carrier generation bymodulating the coupling length of a wavelength-division multiplexer

摘要

A compact all-fiber interrogation technique for Bragg sensors isnpresented. It is based on the generation of an electric carrier bynmodulating the coupling length of a wavelength-division multiplexern(WDM). Theoretical and experimental results are presented when bothnserrodyne and sinusoidal modulations are considered. It is shown thatnthis technique provides static microstrain resolution in measurementnintervals larger than some millistrain