摘要
针对实用中由于参考光束选择标准不统一导致同一激光束的光束质量衍射极限倍数 β因子值不确定的问题 ,利用衍射理论对各种参考光束的远场衍射特性进行了计算和分析 根据研究结果建议 ,在测定激光束衍射极限倍数 β时 。
Considering that the value of beam quality β factor of a given laser beam varies with the referential beam, which brings about uncertainties of beam quality, we have calculated and analyzed the far field diffraction distributions of various referential beams that have been adopted in defining laser beam quality β factor. The results show that among all of referential beams with the same diffraction area or external aperture size, the circular and solid homogenous beam has the smallest far field divergent angle, thus choosing such a beam as the ideal beam would be the most reasonable and strongly proposed.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2003年第9期1038-1040,共3页
Acta Photonica Sinica
