Study of Photorefractive Beam Coupling in Sn2P2S6 in Reflection Grating Geometry
Abstract
This report results from a contract tasking National Academy of Sciences as follows: This project belongs to the technology Area Physics: Optics and Lasers and more precisely it deals with the development of coherent optical amplifiers based on selfdiffraction from the dynamic gratings recorded by the weak signal beam to be amplified and much more powerful coherent pump beam. The main strategic goal of this project consists, in fact, not in amplification of the signal but in deamplification (depletion) of the pump wave, as much effective as possible. To make a step in achieving this goal, a relatively new photorefractive material will be grown, characterized and tested, Tin Hypothiodiphosphate (Sn2P2S6 ) in the Institute of Solid State Physics and Chemistry, Uzhgorod and Institute of Physics, Kiev. The first institute possesses facilities necessary to grow these crystals, to put them into single domain state and to cut and polish samples while the second institute has a long lasting expertise in studies of nonlinear wave mixing in photorefractive materials. The purpose of this project is to find the conditions under which tin hypothiodiphosphate (Sn2P2S6) can ensure the enhanced beam coupling over other currently used materials. To do it new, deliberately doped Sn2P2S6 will be grown and grating recording will be done in new interaction geometries to take profit from optimum combination of crystal electrooptic constants and dielectric constants. We expect to improve at least two times the beam coupling gain factor in reflection geometry known today for tin hypothiodiphosphate and to develop recommendations for further improvement of this principal parameter of optical amplifiers and optical limiters.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 2007
- Accession Number
- ADA494512
Entities
People
- Odoulov S. Georgievich
Organizations
- National Academy of Sciences