Tunable 2-μm optical vortex parametric oscillator.
Tunable 2-μm optical vortex parametric oscillator.
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DOI：
10.1364/oe.20.023666
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发表时间：
2012-10
期刊：
影响因子：
3.8
通讯作者：
T. Yusufu;Y. Tokizane;M. Yamada;K. Miyamoto;T. Omatsu
中科院分区：
文献类型：
--
作者：
T. Yusufu;Y. Tokizane;M. Yamada;K. Miyamoto;T. Omatsu
在涡旋泵浦半对称光学参量振荡器中，实现了拓扑电荷从抽运光束向信号输出的各向异性转移，在波长1.953 ~ 2.158 μm范围内产生了拓扑电荷为1或2的可调谐2 μm光涡旋脉冲。在泵浦能量为22.8 mJ时，最大涡输出能量为2.1 mJ，对应的斜率效率为15%。利用低空间频率传输光栅的剪切干涉技术研究了信号和闲散输出的拓扑电荷。
We generated tunable 2-μm optical vortex pulses with a topological charge of 1 or 2 in the wavelength range 1.953-2.158 μm by realizing anisotropic transfer of the topological charge from the pump beam to the signal output in a vortex-pumped half-symmetric optical parametric oscillator. A maximum vortex output energy of 2.1 mJ was obtained at a pump energy of 22.8 mJ, which corresponds to a slope efficiency of 15%. The topological charges of the signal and idler output were investigated using a shearing interferometric technique employing a low-spatial-frequency transmission grating.