title: Apodization of terahertz Bragg gratings in subwavelength polymer fiber.
abstract: We report on an apodization scheme for terahertz fiber Bragg gratings. The grating consists of only 90 ablated notches on two opposite sides of a subwavelength polymer fiber. The grating strength can be effectively tuned by controlling the longitudinal shift between the two-sided notches, and apodization can be achieved by applying an envelope profile. Side lobe suppression of 14 dB was experimentally observed when compared with an unapodized grating.
authors.affiliation: Department of Electronic Engineering, City University of Hong Kong, Hong Kong, 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: Kwai Man
authors.initials: KM
authors.lastname: Luk
authors.forename: Yuk Tak
authors.initials: YT
authors.lastname: Chow