Abstract
The humidity response of poly(methyl methacrylate) (PMMA)-based optical fiber Bragg gratings (POFBGs) has been studied. The characteristic wavelength of the grating is modulated by water absorption-induced swelling and refractive index change in the fiber. This work indicates that anisotropic expansion may exist in PMMA optical fiber, reducing the humidity responsivity of the grating and introducing uncertainty in the responsivity from fiber to fiber. By pre-straining a grating, one can get rid of this uncertainty and simultaneously improve the POFBG response time.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Wei Zhang, David J. Webb, and Gang-Ding Peng
Opt. Lett. 40(17) 4046-4049 (2015)
Xianfeng Chen, Wei Zhang, Chen Liu, Yanhua Hong, and David J. Webb
Opt. Express 23(20) 25942-25949 (2015)
Getinet Woyessa, Kristian Nielsen, Alessio Stefani, Christos Markos, and Ole Bang
Opt. Express 24(2) 1206-1213 (2016)