Yunhe Zhao, Changle Wang, Guolu Yin, B. Jiang, K. Zhou, C. Mou, Yunqi Liu, Lin Zhan, Tingyun Wang
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Fiber specklegram sensor based on the twist-induced effect in tilted two-mode fiber Bragg gratings
We demonstrate a fiber specklegram sensor based on the twist-induced effect in tilted two-mode fiber Bragg gratings (TM-FBGs). The measured LP21 mode specklegram rotates 4.73 (radm−1) with twist in the tilted TM-FBGs.