Han, Young-Geun Song, Suho Kim, Gil Hwan Lee, Kwanil Lee, Sang Bae Lee, Ju Han Jeong, Chang Hyun Oh, Chi Hwan Kang, Hee Jeon 2024-01-21T00:34:19Z 2024-01-21T00:34:19Z 2021-09-02 2007-08-01 0146-9592 https://pubs.kist.re.kr/handle/201004/134212 We propose and experimentally demonstrate a simple and flexible scheme for the simultaneous measurement of strain and temperature using long-period fiber gratings (LPFGs) based on versatile holey fibers (HFs) with different air-hole sizes. The strongly resonant LPFGs (as much as -24 dB) can be successfully achieved. The LPFGs inscribed in the HFs have similar temperature sensitivities regardless of air-hole size because of the same material composition. The strain sensitivities of the LPFGs, however, are different, since holey fibers have different cross-sectional areas depending on the air-hole size. The strain sensitivities of the HF-based LPFGs are enhanced by a factor larger than 2 as the air-hole size increases. (c) 2007 Optical Society of America. English OPTICAL SOC AMER PHOTONIC CRYSTAL FIBER SENSITIVITY SENSORS Simultaneous independent measurement of strain and temperature based on long-period fiber gratings inscribed in holey fibers depending on air-hole size Article 10.1364/OL.32.002245 1 OPTICS LETTERS, v.32, no.15, pp.2245 - 2247 OPTICS LETTERS 32 15 2245 2247 scie scopus 000249087200059 2-s2.0-39749158531 Optics Optics Article PHOTONIC CRYSTAL FIBER SENSITIVITY SENSORS holey fiber grating strain