title: Apodization of elliptical-core two-mode fiber acousto-optic filter based on acoustic polarization control.
abstract: We propose and demonstrate a novel apodization technique for an elliptical-core two-mode fiber acousto-optic filter by twisting the fiber and adjusting the acoustic polarization. The sidelobe suppression in the filter spectrum was improved from -9.7 to -15.5 dB. A theoretical analysis that includes acoustic birefringence explains the experimental results with good agreement.
authors.affiliation: Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, South Korea. wasteland@kaist.ac.kr
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Park
authors.forename: Byoung Yoon
authors.initials: BY
authors.lastname: Kim
authors.forename: Hee Su
authors.initials: HS
authors.lastname: Park