Generation of high-efficiency,high-purity,and broadband Laguerre-Gaussian modes from a Janus optical parametric oscillator  

作　　者：Dunzhao Wei Pengcheng Chen Yipeng Zhang Wenzhe Yao Rui Ni Xiaopeng Hu Xinjie Lv Shining Zhu Min Xiao Yong Zhang 

机构地区：[1]Nanjing University,College of Engineering and Applied Sciences,School of Physics,National Laboratory of Solid State Microstructures,Nanjing,China [2]Sun Yat-Sen University,School of Physics,State Key Laboratory of Optoelectronic Materials and Technologies,Guangzhou,China [3]Nanjing University,Collaborative Innovation Center of Advanced Microstructures,Nanjing,China [4]University of Arkansas,Department of Physics,Fayetteville,Arkansas,United States

出　　处：《Advanced Photonics Nexus》2023年第3期62-69,共8页先进光子学通讯（英文）

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFA1400803);the National Natural Science Foundation of China(Grant Nos.91950206,11874213,and 11674171);the Key Research Program of Jiangsu Province(Grant No.BE2015003-2);the Guangdong Natural Science Funds for Distinguished Young Scholars(Grant No.2022B1515020067).

摘　　要：Laguerre-Gaussian(LG)modes,carrying the orbital angular momentum of light,are critical for important applications,such as high-capacity optical communications,superresolution imaging,and multidimensional quantum entanglement.Advanced developments in these applications demand reliable and tunable LG mode laser sources,which,however,do not yet exist.Here,we experimentally demonstrate highly efficient,highly pure,broadly tunable,and topological-charge-controllable LG modes from a Janus optical parametric oscillator(OPO).The Janus OPO featuring a two-faced cavity mode is designed to guarantee an efficient evolution from a Gaussian-shaped fundamental pump mode to a desired LG parametric mode.The output LG mode has a tunable wavelength between 1.5 and 1.6μm with a conversion efficiency>15%,a controllable topological charge up to 4,and a mode purity as high as 97%,which provides a high-performance solid-state light source for high-end demands in multidimensional multiplexing/demultiplexing,control of spin-orbital coupling between light and atoms,and so on.

关 键 词：orbital angular momentum Laguerre-Gaussian mode optical parametric oscillator 

分 类 号：TN2[电子电信—物理电子学]