Efficient frequency conversion by stimulated Raman scattering in aqueous solutions of nitrate salts

by Zion Hazan

at Quantum optics seminar

Thu, 15 Mar 2018, 15:30
Physics building (#54) room 207

Abstract

Stimulated Raman scattering SRS a nonlinear inelastic light scattering process resulting from the interaction of pump lasers with Raman active media is an appealing technique for generation of radiation at new wavelengths Here we investigated experimentally the SRS of a single pass pump beam frequency doubled Nd:YAG laser green 532 nm 5 ns through cells of different lengths containing aqueous solutions of saturated sodium nitrate Efficient frequency conversion of the pump to 1st yellow 564 nm and 2nd orange 599 nm Stokes was achieved by SRS and four wave mixing FWM processes The dependencies of the measured rising energies of the Stokes components vs the pump energies were validated by a newly developed numerical model accounting for the involved physical processes The numerical computations revealed that the 1st Stokes was generated from the pump laser while the onset and amplification of the 2nd Stokes were atypically obtained through FWM These results reinforce the significant role played by self induced thermal defocusing of the involved beams The high frequency conversion efficiencies that were obtained show that realization of yellow a hard achievable zone from green is easily achievable

Created on 08-03-2018 by Bar Lev, Yevgeny (ybarlev)
Updaded on 08-03-2018 by Bar Lev, Yevgeny (ybarlev)