title: Self Pumped Optical Phase Conjugation at 1.06 microm in Te-doped Sn2P2S6.
abstract: We demonstrate self-pumped optical phase conjugation in Te-doped Sn2P2S6, a semiconducting ferroelectric crystal, using a 1.06 microm wavelength cw Nd:YAG laser. The photorefractive gain of this crystal has been increased to Gamma = (3.9+/- 0.4) cm-1 by Te doping. We observed self-pumped optical phase conjugation in a ring cavity scheme with phase conjugate reflectivities of more than 40 percent and a very fast phase conjugate rise time below 100ms at a light intensity of 20 W/cm2. This is more than two orders of magnitude faster than in any other photorefractive crystal, as e.g. in Rh-doped BaTiO3.
authors.forename: Tobias
authors.initials: T
authors.lastname: Bach
authors.forename: Mojca
authors.initials: M
authors.lastname: Jazbinsek
authors.forename: Peter
authors.initials: P
authors.lastname: Günter
authors.forename: Alexander
authors.initials: A
authors.lastname: Grabar
authors.forename: Ivan
authors.initials: I
authors.lastname: Stoika
authors.forename: Yulian
authors.initials: Y
authors.lastname: Vysochanskii