Optical vortex copier and regenerator in the Fourier domain  

作　　者：XIAODONG QIU FANGSHU LI HAIGANG LIU XIANFENG CHEN LIXIANG CHEN 

机构地区：[1]Department of Physics, Jiujiang Research Institute and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices,Xiamen Universi~ Xiamen 361005, China [2]State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy,Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Photonics Research》2018年第6期641-646,共6页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(NSFC)(11474238,11734011,91636109);Fundamental Research Funds for the Central Universities at Xiamen University(20720160040);Natural Science Foundation of Fujian Province(2015J06002);Program for New Century Excellent Talents in University(NCET)(NCET-13-0495);National Key R&D Program of China(2017YFA0303700)

摘　　要：The generation and manipulation of optical vortices are of fundamental importance in a variety of promising applications. Here, we develop a nonlinear optical paradigm to implement self- and cross-convolution of optical vortex arrays, demonstrating the features of a vortex copier and regenerator. We use a phase-only spatial light modulator to prepare the 1064 nm invisible fundamental light to carry special optical vortex arrays and use a potassium titanyl phosphate crystal to perform type Ⅱ second-harmonic generation in the Fourier domain to achieve 532 nm visible structured vortices. Based on pure cross-convolution, we succeed in copying arbitrary-order single vortices as well as their superposition states onto a prearranged array of fundamental Gaussian spots. Also, based on the simultaneous effect of self- and cross-convolutions, we can expand the initial vortex lattices to regenerate more vortices carrying various higher topological charges. Our presented method of realizing imaging, an optical vortex copier and regenerator could find direct applications in optical mani optical communication, and quantum information processing with structured vortex pulation, optical arrays.The generation and manipulation of optical vortices are of fundamental importance in a variety of promising applications. Here, we develop a nonlinear optical paradigm to implement self-and cross-convolution of optical vortex arrays, demonstrating the features of a vortex copier and regenerator. We use a phase-only spatial light modulator to prepare the 1064 nm invisible fundamental light to carry special optical vortex arrays and use a potassium titanyl phosphate crystal to perform type Ⅱ second-harmonic generation in the Fourier domain to achieve 532 nm visible structured vortices. Based on pure cross-convolution, we succeed in copying arbitrary-order single vortices as well as their superposition states onto a prearranged array of fundamental Gaussian spots. Also, based on the simultaneous effect of self-and cross-convolutions, we can expand the initial vortex lattices to regenerate more vortices carrying various higher topological charges. Our presented method of realizing an optical vortex copier and regenerator could find direct applications in optical manipulation, optical imaging, optical communication, and quantum information processing with structured vortex arrays.

关 键 词：Optical vortices Harmonic generation and mixing Nonlinear optical signal processing 

分 类 号：TN1[电子电信—物理电子学]