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

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

doi:10.1038/s41598-021-86945-1

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

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

Authors

Mairihaba Ababaike^{1

2}, Shutong Wang^{1

2}, Palidan Aierken¹, Takashige Omatsu^{3

4}, Taximaiti Yusufu^{5

6}

Affiliations

¹ School of Physics and Electronic Engineering, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China.
² Laboratory of Novel Light Source and Micro/Nano-Optics, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China.
³ Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
⁴ Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
⁵ School of Physics and Electronic Engineering, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China. taxmamat_84@sina.com.
⁶ Laboratory of Novel Light Source and Micro/Nano-Optics, Xinjiang Normal University, Ürümqi, 830054, Xinjiang, China. taxmamat_84@sina.com.

Abstract

We investigated high energy, near and mid-infrared optical vortex lasers formed by a 1 μm optical vortex-pumped KTiOAsO₄ (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_s ~ 1.3 nm (~ 5.5 cm^-1) and Δλ_i ~ 1.7 nm (~ 1.4 cm^-1), respectively.