基于磷酸钛氧钾（KTA）的近红外和中红外光学涡旋参量振荡器

Near and mid-infrared optical vortex parametric oscillator based on KTA.

作者信息

Ababaike Mairihaba, Wang Shutong, Aierken Palidan, Omatsu Takashige, Yusufu Taximaiti

机构信息

School of Physics and Electronic Engineering, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China.

Laboratory of Novel Light Source and Micro/Nano-Optics, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China.

出版信息

Sci Rep. 2021 Apr 13;11(1):8013. doi: 10.1038/s41598-021-86945-1.

DOI:10.1038/s41598-021-86945-1

PMID:33850170

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8044083/

Abstract

We investigated high energy, near and mid-infrared optical vortex lasers formed by a 1 μm optical vortex-pumped KTiOAsO (KTA) optical parametric oscillator. The orbital angular momentum (OAM) of the pump beam can be selectively transferred to the signal or idler output by changing the reflectivity of the output coupler. With this system, 1.535 µm vortex signal output with an energy of 2.04 mJ and 3.468 µm vortex idler output with an energy of 1.75 mJ were obtained with a maximum pump energy of 21 mJ, corresponding to slope efficiencies of 14% and 10%, respectively. The spectral bandwidth (full width at half maximum, FWHM) of the signal and idler vortex outputs were measured to be Δλ ~ 1.3 nm (~ 5.5 cm) and Δλ ~ 1.7 nm (~ 1.4 cm), respectively.

摘要

我们研究了由1μm光学涡旋泵浦的KTiOAsO（KTA）光学参量振荡器形成的高能近红外和中红外光学涡旋激光器。通过改变输出耦合器的反射率，泵浦光束的轨道角动量（OAM）可以选择性地转移到信号光或闲频光输出中。利用该系统，在最大泵浦能量为21mJ的情况下，获得了能量为2.04mJ的1.535μm涡旋信号输出和能量为1.75mJ的3.468μm涡旋闲频光输出，相应的斜率效率分别为14%和10%。信号光和闲频光涡旋输出的光谱带宽（半高全宽，FWHM）分别测量为Δλ ~ 1.3nm（~ 5.5cm）和Δλ ~ 1.7nm（~ 1.4cm）。