Author Affiliations
Abstract
1 College of Materials Science and Engineering, China JiLiang Universiy, Hangzhou 310018, China
2 Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
An efficient two-stage KTiOAO4 optical parametric amplifier (OPA) system with walk-off-compensating alignment is designed. By introducing an extra time delay between the pump pulse and the signal pulse, this OPA architecture is capable of obtaining high optical conversion efficiency and high signal gain simultaneously. Finally, a maximum gain of 98 at the 1.57 μm wavelength is obtained with the signal beam quality of M2 around 5.6. The efficiency of the optical conversion from 1.064 to 1.57 μm is around 26%.
140.3280 Laser amplifiers 190.4410 Nonlinear optics, parametric processes Chinese Optics Letters
2015, 13(11): 111402
中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室，上海 201800
星载积分路径差分吸收(Integrated Path Differential Absorption, IPDA)激光雷达是一种有效的高精度(1 ppm)全球CO2 柱线浓度测量手段。结合 其基本工作原理分析了CO2 柱线浓度反演技术方法，并优化了工作波段和工作波长。分析了由所选波段激光频率的稳定性、 激光带宽和激光光谱纯度等激光雷达发射源参数变化所带来的CO2 柱线浓度测量误差，并给出了经过优化的设计参数。研究了 用IPDA激光雷达实现双波长脉冲发射激光的技术方法，并给出了实验验证结果，实现了1.572 m波段单脉 冲能量大于50 mJ的激光输出。
二氧化碳 激光雷达 积分路径差分吸收 激光频率稳定性 光学参量振荡放大 carbon dioxide lidar integrated path differential absorption laser frequency stability optical parametric oscillation amplification
中国科学院上海光学精密机械研究所， 上海市全固态激光器与应用技术重点实验室， 上海 201800
对Bounce抽运结构的高功率板条激光放大器进行热仿真，采用有限元数值分析获得了放大光束通过板条后的光程差分布，利用二阶矩法计算出Bounce抽运热效应引入的相位畸变对光束质量M2的影响，为放大链路热效应的补偿给出指导。在采用高效传导冷却设计的三级板条级联放大链路实验装置中，实验测得的每一放大级热焦距值与理论预期吻合良好。当放大器链路工作在250 Hz重复频率时，插入热补偿中继光路，最终获得单脉冲能量537 mJ的输出，光束质量因子M2x=2.35，M2y=2.66。
激光器 Bounce抽运 热效应 有限元分析 二阶矩法
