title: Intermodal four-wave mixing in a higher-order-mode fiber.
abstract: We demonstrate a high-efficiency intermodal four-wave-mixing process in an all-fiber system, comprising a picosecond fiber laser and a high-order-mode (HOM) fiber. Two pump photons in the LP(01) mode of the fiber can generate an anti-Stokes photon in the LP(01) mode and a Stokes photon in the LP(02) mode. The wavelength dependent mode profiles of the HOM fiber produce significant spatial overlap between the modes involved. The anti-Stokes wave at 941 nm is generated with 20% conversion efficiency with input pulse energy of 20 nJ. The guidance of the anti-Stokes and Stokes waves in the HOM fiber enhances system stability.
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