We have demonstrated experimentally beam amplification by coupling between the signal beam and the photorefractive surfaces wave in Bi12TiO20 crystal. A gain of 16,000 has been measured, with an output signal-to-noise ratio of >20 for weak input signals.
© 1996 Optical Society of America
A. V. Khomenko, A. García-Weidner, and A. A. Kamshilin, "Amplification of optical signals in Bi12TiO20 crystal by photorefractive surface waves," Opt. Lett. 21, 1014-1016 (1996)