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 TE<sub>01</sub> 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.
© 2004 Optical Society of America
Pedram Z. Dashti and Henry P. Lee, "All-fiber narrowband polarization controller based on coherent acousto-optic mode coupling in single-mode fiber," Opt. Lett. 29, 2426-2428 (2004)