部分端面抽运板条激光器腔镜倾斜问题研究

王宁; 陆雨田

中国激光, 2005, 32 (12): 1593, 网络出版: 2006-06-01

部分端面抽运板条激光器腔镜倾斜问题研究

Sensitivity to Mirror Tilt of Off-Axis Hybrid Resonator for InnoSlab

论文大纲

王宁 ^1,2,*陆雨田 ¹

作者单位

¹ 中国科学院上海光学精密机械研究所,上海 201800

² 中国石油大学(华东)物理科学与技术学院,山东东营 257061

激光技术腔镜倾斜快速傅里叶算法离轴混合腔 laser technique mirror tilt fast Fourier-transform algorithm off-axis hybrid resonator

摘要

部分端面抽运的板条激光器是一种新型固体激光器,配合混合腔可以实现在大功率下保持高光束质量的激光振荡输出。谐振腔的腔镜倾斜是影响激光器输出特性的重要因素,快速傅里叶方法是一种快捷有效的计算方法,利用此方法模拟了腔镜倾斜对近场相位分布和远场光强分布的影响,并分析了光束质量的变化。理论分析表明,腔镜的小角度倾斜对近场相位影响较大,但对远场光强空间分布影响不大；随着倾斜角度不断增大,远场发散角和光束腰宽度也增大,光束质量虽然存在恶化的趋势,但光束质量因子M2值仍然较小,离轴非稳腔仍能保持高光束质量的输出。

Abstract

Partially end-pumped slab laser is an innovative solid state laser. Combining the hybrid resonator with partially end-pumping, the output power can be scaled at high beam quality (called InnoSlab). The misalignment of resonator is important to the laser output character. By fast Fourier-transform (FFT) algorithm, the near-field phase and far-field intensity distribution with different mirror obliquity were simulated. The analysis showed that the near-field phase distribution is greatly influenced by mirror tilt, and the far-field intensity distribution is not affected greatly; the far-field divergence angle and beam waist width are increased, but the M2 value is still small.

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王宁, 陆雨田. 部分端面抽运板条激光器腔镜倾斜问题研究[J]. 中国激光, 2005, 32(12): 1593. 王宁, 陆雨田. Sensitivity to Mirror Tilt of Off-Axis Hybrid Resonator for InnoSlab[J]. Chinese Journal of Lasers, 2005, 32(12): 1593.

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