title: All-fiber narrowband polarization controller based on coherent acousto-optic mode coupling in single-mode fiber.
abstract: An all-fiber, narrowband, tunable polarization controller is proposed and demonstrated. The device is based on coherent acousto-optic mode coupling induced by two orthogonal acoustic waves on a dispersion-compensating fiber. The cooperative coupling between the two polarizations of the core mode and the TE01 cladding mode through the two gratings permits indirect coupling between the two polarizations of the core mode with nearly 100% efficiency, which makes the polarization-controlling function possible. Experimental results verify the operation of the polarization controller with an insertion loss of <1 dB.
authors.affiliation: Department of Electrical Engineering and Computer Science, Henry Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, USA.
authors.forename: Pedram Z
authors.initials: PZ
authors.lastname: Dashti
authors.forename: Qun
authors.initials: Q
authors.lastname: Li
authors.forename: Henry P
authors.initials: HP
authors.lastname: Lee