title: High-speed photorefraction at telecommunication wavelength 1.55 microm in Sn2P2S6:Te.
abstract: We demonstrated for what is the first time to our knowledge photorefractive two-wave mixing in a bulk ferroelectric crystal using cw light at the telecommunication wavelength 1.55 microm. In the Te-doped ferroelectric semiconductor Sn2P2S6 with absorption constant <0.1 cm(-1) at 1.55 microm, grating recording times of 10 ms and a two-beam coupling gain of 2.8 cm(-1) have been measured at 350 mW power (intensity 440 W/cm(2)) without a necessity to apply an external electric field. With a moving grating technique, a maximal gain of 6.0 cm(-1) has been obtained.
authors.affiliation: Nonlinear Optics Laboratory, Swiss Federal Institute of Technology, ETH Zurich 8093 Zurich, Switzerland. nlo@phys.ethz.ch
authors.forename: Roger
authors.initials: R
authors.lastname: Mosimann
authors.forename: Patrick
authors.initials: P
authors.lastname: Marty
authors.forename: Tobias
authors.initials: T
authors.lastname: Bach
authors.forename: Flurin
authors.initials: F
authors.lastname: Juvalta
authors.forename: Mojca
authors.initials: M
authors.lastname: Jazbinsek
authors.forename: Peter
authors.initials: P
authors.lastname: Günter
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Grabar