Author Affiliations
Abstract
1 Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 Laboratory of Space Laser Engineering, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
The influences of nutation trail accuracy, simplification of coupling model, spot position jitter, and power variation of incident light on the detection error are analyzed theoretically. Under the condition of satisfying the requirements, the nutation radius is less than 1.13 μm, the accuracy of the nutation trail is less than 0.04 μm, and the detection range is [?5 μm, +5 μm]. The nutation frequency is 160 times spot position jitter frequency and 100 times intensity jitter frequency of incident light. The analysis is of great significance for determining nutation radius and frequency in the tracking system based on fiber nutation.
fiber nutation detection error tracking system Chinese Optics Letters
2020, 18(2): 020604
1 中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室, 上海 201800
2 中国科学院大学, 北京 100049
报道了一种可宽温稳定工作的高峰值功率亚纳秒被动调Q的Nd∶GdVO4激光器。激光振荡级采用平凹腔结构，以尾纤耦合半导体激光器端面抽运Nd∶GdVO4晶体，以Cr4+∶YAG作为可饱和吸收体进行被动调Q。在抽运吸收能量为5.9 mJ时，振荡级输出峰值功率为1.5 MW,脉冲宽度为600 ps的脉冲激光，单脉冲能量为0.9 mJ，光-光转换效率为15.4%，光束发散角为1.2 mrad。采用端面抽运的双程放大结构对振荡级输出激光进行放大，最终得到峰值功率为3.5 MW，单脉冲能量为2.1 mJ激光输出。测量了不同温度下的激光能量的变化，结果表明,在20~36 ℃的温度范围内，激光输出能量的抖动量(均方根)为5%。激光器结构紧凑、功耗低，可作为未来空间激光应用的光源。
激光器 高峰值功率 窄脉宽 宽温
