title: Mode recoupling in a novel Bragg grating pair.
abstract: A new type of mode recoupling in a Bragg grating pair, in which one of the gratings is written in the fiber cladding, is proposed to overcome limitations of concatenated long-period and fiber Bragg gratings reported earlier [Opt. Lett. 27, 1214 (2002)]. Its reflection spectrum is similar to that of the previously reported concatenated grating structure; however, the reflectivity can be much larger than the previous limitation of 50%. Furthermore, avoidance of the loss induced by a long-period grating makes such a Bragg grating pair more attractive for practical applications.
authors.affiliation: Photonics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
authors.forename: A Ping
authors.initials: AP
authors.lastname: Zhang
authors.forename: Hwa-Yaw
authors.initials: HY
authors.lastname: Tam
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Tao