Tunable near- and mid-infrared (1.36-1.63 μm and 3.07-4.81 μm) optical vortex laser source
Tunable near- and mid-infrared (1.36-1.63 μm and 3.07-4.81 μm) optical vortex laser source
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DOI：
10.1088/1612-202x/ab7dcf
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发表时间：
2020-04-01
影响因子：
1.7
通讯作者：
Omatsu, Takashige
中科院分区：
文献类型：
--
作者：
Niu, Sujian;Wang, Shutong;Omatsu, Takashige
利用一个1 μ m纳秒级光涡旋抽运的光学参量振荡器，利用一个具有五个光栅畴的周期极化MgO掺杂Li_2O_3晶体，实现了近红外和中红外涡旋模的产生.该系统通过简单地控制腔的Q值，就能实现信号光和闲频光输出之间的轨道角动量交换，并可获得波长范围为1.36-1.63 μ m或3.07-4.81 μ m的涡旋光输出。在泵浦能量为21 mJ时，获得了4.3 mJ（2.2 mJ）的最大信号（闲频）涡旋输出能量，这对应于超过20%（10%）的光-光转换效率。
The generation of near- and mid-infrared vortex mode is demonstrated from a 1 mu m nanosecond optical vortex pumped optical parametric oscillator using a multi-grating MgO-doped periodically poled lithium niobate crystal with five grating domains. This system enables the orbital angular momentum between the signal and idler outputs to be exchanged simply by controlling the cavity Q-factor, and a vortex output in the wavelength ranges of 1.36-1.63 mu m or 3.07-4.81 mu m could be obtained. A maximum signal (idler) vortex output energy of 4.3 mJ (2.2 mJ) was achieved at a pump energy of 21 mJ, which corresponds to an optical-optical conversion efficiency of over 20% (10%).