H. Ding, D. Grobnic, C. Hnatovsky, P. Lu, R. Walker, S. Mihailov
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Abstract
The graded-index fiber lens was used to couple probe light into the multimode sapphire fiber containing a Bragg grating (SFBG). It improved the spectral resolution of the SFBG and facilitated the packaging of the SFBG as a fiber sensor for applications in high temperature environments.
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