Novel fiber devices and sensors based on multimode fiber Bragg gratings

Keith H. Wanser; Karl F. Voss; Alan D. Kersey

doi:10.1117/12.185051

14 September 1994 Novel fiber devices and sensors based on multimode fiber Bragg gratings

Keith H. Wanser, Karl F. Voss, Alan D. Kersey

Proceedings Volume 2360, Tenth International Conference on Optical Fibre Sensors; (1994) https://doi.org/10.1117/12.185051
Event: 10th Optical Fibre Sensors Conference, 1994, Glasgow, United Kingdom

Abstract

Two categories of multimode fiber Bragg gratings (MMFBG) are possible, independent mode and mode coupling, each leads to novel types of fiber devices and sensors. All-mode, wave optics calculations of the reflectivity of independent mode MMFBG are presented, including the effects of individual mode power changes due to microbending transducer loss upstream from the grating. MMFBG offer added flexibility in grating design and performance characteristics compared to single mode FBG, since the reflectivity response may be tuned by the spatial periodicity, length, core size, numerical aperture, and mode coupling characteristics of the grating. New sensing and diagnostic methods that are possible with these gratings and some methods for sensor addressing and multiplexing are described.

Citation Download Citation

Keith H. Wanser, Karl F. Voss, and Alan D. Kersey "Novel fiber devices and sensors based on multimode fiber Bragg gratings", Proc. SPIE 2360, Tenth International Conference on Optical Fibre Sensors, (14 September 1994); https://doi.org/10.1117/12.185051

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