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.
© 2013 Optical Society of America
Optical Design and Fabrication
Original Manuscript: May 17, 2013
Revised Manuscript: June 26, 2013
Manuscript Accepted: July 4, 2013
Published: July 29, 2013
Shu Fan Zhou, Laurence Reekie, Hau Ping Chan, Kwai Man Luk, and Yuk Tak Chow, "Apodization of terahertz Bragg gratings in subwavelength polymer fiber," Opt. Lett. 38, 2807-2809 (2013)