长周期光纤光栅最低阶包层模在折返点处旁瓣的灵敏度分析
Sensitivity Analysis of Sidelobes of the Lowest Order Cladding Mode of Long Period Fiber Gratings at Turn Around Point.
作者信息
Dey Tanoy Kumar, Tombelli Sara, Roy Arpan, Biswas Palas, Giannetti Ambra, Basumallick Nandini, Baldini Francesco, Bandyopadhyay Somnath, Trono Cosimo
机构信息
Central Glass and Ceramic Research Institute, CSIR-CGCRI, 196 Raja S C Mullick Road, Kolkata 700032, India.
Institute of Applied Physics "Nello Carrara", CNR-IFAC, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.
出版信息
Sensors (Basel). 2022 Apr 12;22(8):2965. doi: 10.3390/s22082965.
A new methodology to enhance the sensitivity of a long period fiber grating sensor (LPFG) at the Turn Around Point (TAP) is here presented. The LPFG sensor has been fabricated by etching the fiber up to 20.4 µm, until the sidelobes of dispersed LP cladding mode appeared near TAP in aqueous medium. The dual peak sensitivity of the sidelobes was found to be 16,044 nm/SRIU (surrounding refractive index units) in the RI range from 1.333 to 1.3335.
本文提出了一种提高长周期光纤光栅传感器（LPFG）在折返点（TAP）处灵敏度的新方法。通过将光纤蚀刻至20.4 µm来制造LPFG传感器，直至在水介质中TAP附近出现分散的LP包层模旁瓣。在1.333至1.3335的折射率范围内，发现旁瓣的双峰灵敏度为16,044 nm/SRIU（周围折射率单位）。
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