title: A temperature-insensitive cladding-etched Fiber Bragg grating using a liquid mixture with a negative thermo-optic coefficient.
abstract: To compensate for the temperature dependency of a standard FBG, a cladding-etched FBG immersed with a liquid mixture having a negative thermo-optic coefficient is presented, and its characteristics are investigated. The Bragg wavelength of the cladding-etched FBG is shifted counter to the direction of the Bragg wavelength shift of a conventional FBG according to the mixing ratio of glycerin to water; thus, the temperature-dependent Bragg wavelength shift was almost compensated by using a liquid mixture of water (50%) and glycerin (50%) having the negative thermo-optic coefficient of -5 × 10(-4) °C(-1).
authors.affiliation: Department of Optoelectronics, Honam University, Gwangju 506-714, Korea.
authors.forename: Kwang Taek
authors.initials: KT
authors.lastname: Kim
authors.forename: In Soo
authors.initials: IS
authors.lastname: Kim
authors.forename: Cherl-Hee
authors.initials: CH
authors.lastname: Lee
authors.forename: Jonghun
authors.initials: J
authors.lastname: Lee