High-order LP modes based Sagnac interference for temperature sensing with an enhanced optical Vernier effect
Hongwei Li,
Hailiang Chen,
Sajid Ullah
et al.
Abstract:In this paper, high-order LP modes based Sagnac interference for temperature sensing are proposed and investigated theoretically. Based on the specific high-order LP modes excited through the mode selective couplers (MSCs), we design a stress-induced Panda-type few-mode fiber (FMF) supporting 4 LP modes and construct a Sagnac interferometer to achieve a highly sensitive temperature sensor. The performances of different LP modes (LP01, LP11, LP21, and LP02) are explored under a single Sagnac interferometer and … Show more
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