title: Resonant bend loss in leakage channel fibers.
abstract: Leakage channel fibers, designed to suppress higher-order modes, demonstrate resonant power loss at certain critical radii of curvature. Outside the resonance, the power recovers to the levels offset by the usual mechanism of bend-induced loss. Using C2 imaging, we experimentally characterize this anomaly and identify the corresponding physical mechanism as the radiative decay of the fundamental mode mediated by the resonant coupling to a cladding mode.
authors.affiliation: Photonics Center, Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215, USA. barankov@bu.edu
authors.forename: R A
authors.initials: RA
authors.lastname: Barankov
authors.forename: K
authors.initials: K
authors.lastname: Wei
authors.forename: B
authors.initials: B
authors.lastname: Samson
authors.forename: S
authors.initials: S
authors.lastname: Ramachandran