The tilted fiber Bragg grating is a new kind of sensor that possesses all the advantages of well-established Bragg grating technology in addition to being able to excite cladding modes resonantly. This device opens up a multitude of opportunities for single-point sensing in hard-to-reach spaces.

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Journal Optics and Photonics News
Albert, J. (2011). Tilted fiber bragg gratings as multi-sensors. Optics and Photonics News, 22(10), 28–33. doi:10.1364/OPN.22.10.000028