摘要
介绍了一种固态高功率318.6 nm紫外激光系统,通过1 560.5 nm和1 076.9 nm红外激光单次穿过PPMgO:LN准位相匹配晶体和频产生637.2 nm单频红光,之后637.2 nm激光经四镜环形腔增强偏硼酸钡(BBO)晶体谐振倍频产生~2W的窄线宽、连续可调谐的318.6 nm紫外激光。基于此激光系统,研究了声光调制器(AOM)闭环主动反馈稳定318.6 nm紫外激光功率,时域激光强度起伏由±11.12%抑制到了±0.08%,频域反馈环路响应带宽约13 kHz。之后将紫外激光结合铯冷原子磁光阱,研究了俘获损耗光谱。获得稳定的、窄线宽、连续可调谐的318.6 nm紫外激光,对研究铯里德堡原子间相互作用有重要意义。
A solid-state high-power 318.6 nm ultraviolet laser system is introduced, which generates a 637.2 nm single-frequency laser by single-pass PPMgO:LN crystal sum-frequency generation of two infrared lasers at 1 560.5 nm and 1 076.9 nm, then generates 2 W narrow-linewidth continuously-tunable 318.6 nm ultraviolet laser by a four-mirror ring cavity second-harmonic generation of 637.2 nm laser. Based on the laser system, closed-loop feedback intensity stabilization of 318.6 nm ultraviolet laser is carried out with acoustic-optic modulator(AOM). The fluctuation of laser intensity in time domain is suppressed from ±11.12% to ±0.08%, and effective bandwidth of feedback loop in frequency domain is about 13 kHz. Trap-loss spectroscopy of cold cesium atoms is demonstrated by combining ultraviolet laser with cesium magneto-optical trap. It is of great importance to obtain a stable, narrow-linewidth,continuously-tunable 318.6 nm ultraviolet laser for the study of interaction between cesium Rydbergatoms.
作者
王欣
侯晓凯
卢飞飞
白建东
何军
王军民
WANG Xin;HOU Xiaokai;LU Feifei;BAI Jiandong;HE Jun;WANG Junmin(State Key Laboratory of Quantum Opticsand Quantum Optics Devices,andlnstitute of Opto-Electronics,Shanxi University,Taiyuan,China;Departmentof Physics,Faculty of Science,North University of China,Taiyuan,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,China)
出处
《光电技术应用》
2022年第4期64-69,共6页
Electro-Optic Technology Application
基金
国家重点研发计划课题(2021YFA1402002)
国家自然科学基金(11974226,61875111,12104417)
山西省基础研究计划项目(20210302124161)。
关键词
固态高功率318.6
nm激光系统
窄线宽
连续可调谐激光
激光强度稳定
solid-state high power 318.6 nm enhanced laser system
narrow linewidth
continuously tunable laser
laser intensity stabilization
