title: Characterization and modeling of Bragg gratings written in polymer fiber for use as filters in the THz region.
abstract: We demonstrate fiber Bragg gratings written in polymer fiber for use in the THz window for the first time. A KrF excimer laser operating at 248 nm was used to inscribe notch-type gratings in single component Topas subwavelength fiber. A transmission loss at the centre wavelength of the grating of 60 dB is observed in short gratings containing only 192 notches. Experimental results and modeling are presented. The gratings are expected to find use in THz signal filtering and chemical or biosensing applications.
authors.affiliation: Department of Electronic Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
authors.forename: Shu Fan
authors.initials: SF
authors.lastname: Zhou
authors.forename: Laurence
authors.initials: L
authors.lastname: Reekie
authors.forename: Hau Ping
authors.initials: HP
authors.lastname: Chan
authors.forename: Yuk Tak
authors.initials: YT
authors.lastname: Chow
authors.forename: Po Sheun
authors.initials: PS
authors.lastname: Chung
authors.forename: Kwai Man
authors.initials: KM
authors.lastname: Luk
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D011108:Polymers / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D055053:Terahertz Radiation
chemical_list: D011108:Polymers