title: Four-wave mixing with large stokes shifts in heavily Ge-doped silica fibers.
abstract: Four-wave mixing (FWM) in nonlinear germanosilicate fibers with GeO2 concentrations as high as 67 mol.% in the core is studied theoretically and experimentally. Large frequency shifts of 1875-3829 cm(-1) are observed in the mixed-mode pump parametric process. The dependence of FWM phase matching on the GeO2 concentration, core diameter, and index profile is demonstrated. The 2.5% conversion efficiency of an 887 nm signal to a 1.3 microm communication band is obtained at a 2 W cw pump power inside the fiber.
authors.affiliation: Fiber Optics Research Center, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, 38 Vavilov Street, 119991 Moscow, Russia. yuriya@fo.gpi.ru
authors.forename: Y P
authors.initials: YP
authors.lastname: Yatsenko
authors.forename: A D
authors.initials: AD
authors.lastname: Pryamikov
authors.forename: V M
authors.initials: VM
authors.lastname: Mashinsky
authors.forename: M E
authors.initials: ME
authors.lastname: Likhachev
authors.forename: A O
authors.initials: AO
authors.lastname: Mavritsky
authors.forename: E M
authors.initials: EM
authors.lastname: Dianov
authors.forename: A N
authors.initials: AN
authors.lastname: Guryanov
authors.forename: V F
authors.initials: VF
authors.lastname: Khopin
authors.forename: M Y
authors.initials: MY
authors.lastname: Salgansky