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<正>The square soft-edge diaphragm with round angle is designed by Matlab,and is sent to a liquid crystal spatial light modulator by the computer.In order to obtain precompensation for the following laser system, local diaphragm transmission can be adjusted by feedback signals of surface-channel charge-coupled device (SCCD).This method can reduce the diffraction effect and realize no modulation,high stability,high homogeneity,and large scale laser beam.Several parameters of soft-edge diaphragms which affect the laser beam quality are studied systematically,and the optimized values are obtained.The method can avoid the serious modulation of hard edges and provide soft-edge diaphragms of different shapes in a fast and convenient way for the large scale laser beam system. 相似文献
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通过带光纤耦合的激光二极管模块端面泵浦低掺杂浓度的Nd:YVO4晶体,实现高转换效率的TEM00模准连续绿光激光器。实验采用平平对称腔型设计,高衍射效率声光调Q开关,LBO临界相位匹配腔内倍频,在注入功率30W,重复频率20KHz的条件下,获得平均功率为9.6W的532nm激光输出,实际光-光转换效率达到33.4%,相应的1064nm基频光平均输出功率为11.8W, 实际倍频效率为89.8%。同时,测得532nm绿光的M2因子为1.09,脉冲宽度为28ns。文中还对影响绿光光束质量和转换效率的因素进行了分析。 相似文献
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