论文部分内容阅读
为了获得高平均功率的皮秒宽谱段激光,同时减小整个光学系统的体积,本文从理论和实验两方面研究了高功率皮秒激光泵浦受激拉曼散射(SRS)振荡腔。通过分析SRS过程中同时发生的物理过程,将高功率泵浦下的拉曼晶体内多种非线性效应简化为晶体在简单等效透镜下的SRS,并通过实验测量单通SRS光的发散角,计算得到了高功率泵浦下的拉曼晶体等效透镜的曲率半径,在此基础上设计了稳定高效的SRS振荡腔,通过对比实验验证了此拉曼振荡腔的高效性,实现了波段覆盖532~698nm、最高输出功率为1.32 W的皮秒SRS同轴激光的输出。在相同波段覆盖范围内,是已报道的最高平均输出功率。
In order to obtain picosecond wide-band laser with high average power and reduce the volume of the whole optical system at the same time, this paper studies the stimulated Raman scattering (SRS) oscillations pumped by high-power picosecond laser in theory and experiment. By analyzing the simultaneous physical processes in the SRS process, the various nonlinear effects of Raman crystals under high power pumping are reduced to SRS under simple equivalent lens and the divergence angle of single-pass SRS light is experimentally measured , The radius of curvature of the Raman crystal equivalent lens under high power pumping is calculated, and a stable and efficient SRS oscillation cavity is designed. Based on the comparison experiment, the efficiency of the Raman oscillation cavity is verified, Covering the picosecond SRS coaxial laser output at 532 to 698 nm with a maximum output power of 1.32 W, In the same band coverage, is the highest reported average output power.