InnoSlab混合腔输出光束质量的理论研究

对InnoSlab Laser用混合腔的输出光束质量问题从热透镜效应和腔镜的不对准两个方面的影响进行理论分析，并从远场光强分布、远场发散角、光腰半径、光束质量因子M²值和桶中功率曲线等几个角度进行了讨论，特别是离轴非稳腔方向上腔镜倾斜对光束质量的影响，利用M²值和PIB曲线两个参数共同评价非稳腔的光束质量，对目前并无统一标准的非稳腔光束质量评价问题提供了有意义的参考. 关键词： InnoSlab 混合腔 光束质量 桶中功率

Theoretical research on InnoSlab output beam quality with hybrid resonator

Output beam quality of InnoSlab laser with hybrid resonator is analyzed in this paper for the thermal lens effect and mirror misalignment. Many aspects, such as far-field light intensity distribution, far-field divergence angle, beam waist radius, beam quality factor M² and PIB curve, etc, are discussed. Especially, in the off-axis unstable resonator direction, the influence of beam quality is discussed with respect to mirror misalignment by M² and PIB curve. This gives valuable reference to unstable resonator beam quality evaluation, for which a unified standard has not been set up as yet.