华北光电技术研究所固体激光技术重点实验室, 北京 100015
报道了一种激光二极管阵列双端双程抽运Yb∶YAG板条激光器。基于抽运光在晶体中的吸收特性,建立双端双程抽运与双端单程抽运结构的抽运分布模型,理论分析了双端双程抽运的优点。在抽运光重复频率为400 Hz、脉宽为1 ms、单脉冲总能量为12 J的条件下,利用偏振复用技术实现双端双程抽运板条激光器,获得单脉冲激光的输出能量约为6.13 J,光-光转化效率约为50%。与具有相同掺杂浓度以及相同抽运光吸收效率的双端单程抽运方式相比,双端双程抽运的输出激光能量更高,转化效率更高,稳定性更强。理论分析与实验结果证明双端双程抽运方式有利于进一步提升激光输出的能量与效率。
激光器 激光二极管 双程抽运 Yb∶YAG; 中国激光
2019, 46(11): 1101007
1 School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China
2 China North Vehicle Research Institute, Beijing 100072, China
3 Beijing Aerospace Automatic Control Institute, Beijing 100854, China
In this paper, a foveated imaging system using a reflective liquid crystal spatial light modulator (SLM) was designed. To demonstrate the concept of foveated imaging, we simulated with software Code V and established a laboratory prototype. The result of the experiment shows that an SLM can be used to correct the aberration of region of interest (ROI) while the resolution of other area was still very low. The varyresolution system was relative simple compared to the traditional high resolution system and obviously can reduce the amount of data transmission. Such systems will have wide application prospect in various fields
optical design optical design foveated imaging foveated imaging spatial light modulator (SLM) spatial light modulator (SLM) tolerance analysis tolerance analysis Frontiers of Optoelectronics
2017, 10(1): 89
