title: Intermodal Čerenkov radiation in a higher-order-mode fiber.
abstract: We demonstrate an intermodal Čerenkov radiation effect in a higher-order-mode (HOM) fiber with a mode crossing (i.e., two guided modes having the same propagation constant at the same wavelength). A frequency-shifted soliton in the vicinity of the mode-crossing wavelength emits a phase-matched dispersive wave in a different propagation mode. We develop a theoretical explanation for this nonlinear optical effect and demonstrate that the mode crossing in HOM fibers can be utilized to achieve simultaneous wavelength and mode conversion; the strength of this intermodal nonlinear interaction can be tuned by controlled fiber bending.
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Ji
authors.initials: J
authors.lastname: Cheng
authors.forename: Martin E V
authors.initials: ME
authors.lastname: Pedersen
authors.forename: Kriti
authors.initials: K
authors.lastname: Charan
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.forename: Chris
authors.initials: C
authors.lastname: Xu
authors.forename: Lars
authors.initials: L
authors.lastname: Grüner-Nielsen
authors.forename: Dan
authors.initials: D
authors.lastname: Jakobsen
mesh_terms: D017711:Nonlinear Dynamics; D055100:Optical Fibers; D055620:Optical Phenomena; D012822:Silicon Dioxide; D013057:Spectrum Analysis
chemical_list: D012822:Silicon Dioxide