Ultrasensitive refractive index sensor based on elliptic microfibers fabricated by CO2 laser

Li-Peng Sun; Jie Li; Long Jin; Bai-Ou Guan

doi:10.1117/12.2059474

2 June 2014 Ultrasensitive refractive index sensor based on elliptic microfibers fabricated by CO₂ laser

Li-Peng Sun, Jie Li, Long Jin, Bai-Ou Guan

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915751 (2014) https://doi.org/10.1117/12.2059474
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A highly-birefringent elliptic microfiber is fabricated by use of the CO₂-laser machining and fusion tapering methods. The fiber ellipse can be well controlled with modification of the CO₂ laser output power. Both positive and negative sensitivities are observed for the structure to be used in the refractive index sensing application, in contrast to the previously-reported microfiber devices. Moreover, the maximum obtained sensitivity is as high as 195348nm/RIU (refractive index unit) around refractive index of 1.35887, which is one order of magnitude higher than other microfiber counterparts. The temperature-cross sensitivity of 0.007nm/°C is quite low.

Citation Download Citation

Li-Peng Sun, Jie Li, Long Jin, and Bai-Ou Guan "Ultrasensitive refractive index sensor based on elliptic microfibers fabricated by CO₂ laser", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915751 (2 June 2014); https://doi.org/10.1117/12.2059474

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