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 1.55μm. In the Te-doped ferroelectric semiconductor Sn2P2S6 with absorption constant <0.1cm1 at 1.55μm, grating recording times of 10ms and a two-beam coupling gain of 2.8cm1 have been measured at 350mW power (intensity 440Wcm2) without a necessity to apply an external electric field. With a moving grating technique, a maximal gain of 6.0cm1 has been obtained.

© 2007 Optical Society of America

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