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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Zhang, Wei; Webb, David J.
Languages: English
Types: Article
Subjects:

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arxiv: Physics::Optics
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.

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