Jinbo Liu
Dalian Institute of Chemical Physics - CAS, China
Title: High efficient generation of IR beam by SRS of high pressure H2, D2 and CH4
Biography
Biography: Jinbo Liu
Abstract
High efficient generation of IR beam by SRS of high pressure H2, D2 and CH4: Stimulated Raman scattering (SRS) is a very effective method to expand the spectrum range of high power laser, especially in the regime of near IR and middle IR. In this paper, SRS of high pressure H2, D2 and CH4 with multiple-pass cell configuration were reported. By the optimization of experimental parameter, such as the pressure of Raman gas and buffer gas, the number of passes, the radium of focus lens, and the radium of curvature mirror, etc., the best conversion efficiency of the first stokes (S1) and the first stokes (S2) was achieved. The lowest S1 threshold was 0.18 MW, and the best S1 conversion efficiency is up to 75%; the lowest S2 threshold was 2.2 MW, and the best S2 conversion efficiency is up to 34%. By the combination of Raman gases and orders of stokes, lasers with wavelength of 1.54μm, 1.56 μm, 1.91 μm, 2.80 μm and 2.92 μm were generated. Experimental results also indicated that lasers with wavelength of 9.8 μm and 22.9 μm were generated.