title: Bragg grating-based optical switching in a bismuth-oxide fiber with strong χ3-nonlinearity.
abstract: We report the first experimental demonstration of Bragg grating-based nonlinear switching in a bismuth-oxide single-mode fiber. Exploiting the strong χ3-nonlinearity of this fiber in a cross-phase modulation scheme, we change the transmission of a probe near the grating stop band from 90 % to 20 %, a 6.5 dB extinction ratio, at powers as low as 55 W. This is an 18-fold improvement in the switching power compared to the best demonstrations in silica. The experimental results agree well with numerical simulations.
authors: ARC Center for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, Sydney, New South Wales, Australia. kabakova@physics.usyd.edu.au
authors: Irina V
authors: IV
authors: Kabakova
authors: Dan
authors: D
authors: Grobnic
authors: Stephen
authors: S
authors: Mihailov
authors: Eric C
authors: EC
authors: Mägi
authors: C Martijn
authors: CM
authors: de Sterke
authors: Benjamin J
authors: BJ
authors: Eggleton
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017711:Nonlinear Dynamics; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
chemical_list: C033301:bismuth oxide; D001729:Bismuth