Jinbo Liu
Dalian Institute of Chemical Physics - CAS, China
Title: Page 4 14:25-14:45 Title: Generation of high power pulses with high repetition rate with subnanosecond pulse front for pumping different lasers Peter A Bokhan, A V Rzhanov Institute of Semiconductor Physics, Russia Session Discussion Sessions On Applications and Trends in Optics | Quantum Science and Technology Session Introduction Session Chair: Luis Gustavo Marcassa, University of São Paulo, Brazil Session Co-Chair: Zhe Wang, Tsinghua University, China 14:45-15:05 Title: Detection of diseases in citrus plants using fluorescence spectroscopy Luis Gustavo Marcassa, University of São Paulo, Brazil 15:05-15:25 Title: Optical phased array propagation in atmospheric channels and coherent beam combining Itay Naeh, Tel Aviv University, Israel 15:25-15:45 Title: Laser beam shaping by manipulating spatial coherence Milo W Hyde IV, Air Force Institute of Technology, USA 15:45-16:05 Title: Laser terahertz emission microscope Masayoshi Tonouchi, Osaka University, Japan Networking & Refreshment Break 16:05-16:25 16:25-16:45 Title: LIBS in China and its quantification development laser-induced breakdown spectroscopy Zhe Wang, Tsinghua University, China 16:45-17:05 Title:
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.