Generation of tunable high-order Laguerre– Gaussian petal-like modes from a mid-infrared optical vortex parametric oscillator  

作　　者：Yuxia Zhou Xining Yang Jianqiang Ye Yuanyuan Ma Ying Wan Jianxiang Wen Taximaiti Yusufu 

机构地区：[1]Xinjiang Normal University,School of Chemistry and Chemical Engineering,Urumqi,China [2]Xinjiang Normal University,School of Physics and Electronic Engineering,Xinjiang Key Laboratory for Luminescence Minerals and Optical Functional Materials,Urumqi,China [3]Chiba University,Graduate School of Engineering,Chiba,Japan [4]Nanjing University of Information Science and Technology,School of Physics and Optoelectronic Engineering,Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean,Nanjing,China [5]Shanghai University,School of Communication and Information Engineering,Key Lab of Specialty Fiber Optics and Optical Access Networks,Shanghai,China

出　　处：《Advanced Photonics Nexus》2024年第3期113-119,共7页先进光子学通讯（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12264049 and 11664041);the Xinjiang Normal University Young Outstanding Talent Programme(Grant No.XJNUQB2022-17).

摘　　要：High-order Laguerre–Gaussian(LG)petal-like beams have become a topic of significant interest due to their potential application in next-generation optical trapping,quantum optics,and materials processing technologies.In this work,we demonstrate the generation of high-order LG beams with petal-like spatial profiles and tunable orbital angular momentum(OAM)in the mid-infrared wavelength region.These beams are generated using idler-resonant optical parametric oscillation(OPO)in a KTiOAsO_(4)(KTA)crystal.By adjusting the length of the resonant cavity,the OAM of the mid-infrared idler field can be tuned and we demonstrate tuning in the range of 0 to10.When using a maximum pump energy of 20.2 mJ,the maximum output energy of high-order modes LG_(0.45),LG_(0.48),and LG_(0.410) were 0.8,0.53,and 0.46 mJ,respectively.The means by which high-order LG modes with petal-like spatial profiles and tunable OAM were generated from the OPO is theoretically modeled by examining the spatial overlap efficiency of the beam waists of the pump and resonant idler fields within the center of the KTA crystal.The methodology presented in this work offers a simple and flexible method to wavelength-convert laser emission and generate high-order LG modes.

关 键 词：high-order Laguerre-Gaussian petal-like modes optical parametric oscillator nonlinear optics KTiOAsO_(4) optical vortices. 

分 类 号：TN2[电子电信—物理电子学]