Mamuti Roukuya, Araki Shungo, Nishida Shigeki, Miyamoto Katsuhiko, Omatsu Takashige
Appl Opt. 2018 Dec 1;57(34):10004-10008. doi: 10.1364/AO.57.010004.
We demonstrate a tunable vortex laser with versatile orbital angular momentum (OAM) states based on a singly resonant optical parametric oscillator formed of a noncritical phase-matching LiBO crystal. The selective generation of a signal (idler) output with three OAMs, including an upconverted (negative) OAM, is achieved simply by appropriate shortening (or extending) of the cavity. The compact cavity configuration also allows for the generation of the signal (idler) output with various OAMs by simply tuning the signal wavelength. The vortex output is tuned within the wavelength region of 0.74 to 1.84 μm with a maximum pulse energy of 2.16 mJ from a pump energy of 9.3 mJ.
我们展示了一种基于由非临界相位匹配的LiBO晶体构成的单共振光学参量振荡器的具有多种轨道角动量（OAM）态的可调谐涡旋激光器。通过适当地缩短（或延长）腔长，可简单地实现具有三种OAM的信号（闲频光）输出的选择性产生，包括上转换（负）OAM。紧凑的腔结构还允许通过简单地调谐信号波长来产生具有各种OAM的信号（闲频光）输出。涡旋输出在0.74至1.84μm的波长范围内调谐，从9.3mJ的泵浦能量获得的最大脉冲能量为2.16mJ。
