Optical phase conjugation of picosecond pulses at 106 μm in Sn_2P_2S_6:Te for wavefront correction in high-power Nd-doped amplifier systems

Abstract

We report, for the first time to our knowledge, on picosecondpulse optical phase conjugation using photorefractive Sn(2)P(2)S(6) crystals. For 7.2-ps pulses at 1.06 mum, we have achieved phase-conjugate reflectivities of up to 45% with very fast build-up times, about 15 ms at an intensity of 23 W/cm(2) using Te-doped Sn(2)P(2)S(6). We furthermore demonstrate aberration-free 5 W optical output of 8-ps pulses at 1.06 mum from a side pumped Nd:YVO(4) amplifier using the Sn(2)P(2)S(6)-based phase-conjugate feedback.

Improved slow light performances using photorefractive two-wave mixing

“…We therefore expect similar performances can be achieved for slowing down light pulses at telecom wavelengths for large Γd. Secondly, Ref [25] makes use of a pulses train to increase the overall interval intensity hence reducing the photorefractive response time and making it possible to slowdown very shorter pulses down to ps. It will be interesting to analyze FD performances for those short pulse durations.…”

Evaluation of Non-Diagonal Components of the Pockels Tensor for Photorefractive Sn2P2S6 Crystal

“…Being transparent in the red and the near-infrared, this material could be combined with powerful infrared laser sources and optical fibers. SPS crystals have been successfully used for the beam clean-up of high-power Nd 3+ amplifier systems [4], the production of dynamic waveguides [5], the manipulation with a light pulse velocity [6], etc.…”

Reflection and transmission of twisted light at phase conjugating interfaces

“…Theoretically, we evaluate the intensity of the reflected field after passing through phase conjugating interfaces (e.g. glasses doped with CdS x Se 1−x [18] or other materials [19][20]). A detailed discussion of the reflection from a conventional mirror vs. a phase conjugating mirror was provided in Refs.…”