Han, Young-Geun Lee, Young Jun Kim, Gil Hwan Cho, Hung Su Lee, Sang Bae Jeong, Chang Hyun Oh, Chi Hwan Kang, Hee Jeon 2024-01-21T03:00:43Z 2024-01-21T03:00:43Z 2021-09-01 2006-07 1041-1135 https://pubs.kist.re.kr/handle/201004/135369 Transmission characteristics of fiber Bragg gratings (FBGs) written in holey fibers with different air-hole size are investigated. The cladding mode coupling of FBGs inscribed on holey fibers is remarkably suppressed due to air holes inside of the silica cladding. The wavelength spacing between the main peak due to the core mode coupling and side peak due to the first-order cladding mode coupling increases as the air-hole size increases because the reduction of the effective index of cladding mode depends on the air-hole size within the fiber. The strain and temperature sensitivities of FBGs are also investigated corresponding to air-hole size of holey fibers. The temperature sensitivities of holey-fiber-based FBGs are similar regardless of air-hole size of holey fibers (similar to 1.9%), but their strain sensitivities are enhanced (similar to 28.4%) as the air-hole size increases. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC TEMPERATURE STRAIN Transmission characteristics of fiber Bragg gratings written in holey fibers corresponding to air-hole size and their application Article 10.1109/LPT.2006.880762 1 IEEE PHOTONICS TECHNOLOGY LETTERS, v.18, no.13-16, pp.1783 - 1785 IEEE PHOTONICS TECHNOLOGY LETTERS 18 13-16 1783 1785 scie scopus 000240417800126 2-s2.0-33747619858 Engineering, Electrical & Electronic Optics Physics, Applied Engineering Optics Physics Article TEMPERATURE STRAIN fiber grating microstructured fiber photonic crystal fiber simultaneous measurement strain sensor temperature sensor