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刘艳格

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期刊论文

Avoided-crossing-based ultrasensitive photoniccrystal fiber refractive index sensor

刘艳格Tingting Han Yan-ge Liu* Zhi Wang Bing Zou Boyin Tai and Bo Liu

June 15, 2010/Vol.35, No.12/OPTICS LETTERS,-0001,():

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摘要/描述

We propose and demonstrate an ultrasensitive photonic crystal fiber refractive index sensor by introducing theavoided-crossing effect in a bent-controlled fluid-filled photonic-bandgap fiber (FF-PBGF). By controlling the bendradius of the FF-PBGF, resonant couplings between the fundamental core mode and the cladding modes are realizedand transmission notches are observed in the transmission band of the FF-PBGF. By changing the refractive index ortemperature of the bent FF-PBGF, a sensitivity of 32,400 nm per refractive index unit (or 13:1 nm=℃) is achieved,which is the highest for a fiber device to date, to our best knowledge.

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