All-optical tunable high-order Gaussian beam splitter based on a periodic dielectric atomic structure

• Published in: Optics express Vol. 29; no. 16; pp. 25439 - 25448
• Main Authors: Zhang, Hengfei, Yuan, Jinpeng, Dong, Shichao, Wu, Chaohua, Wang, Lirong, Xiao, Liantuan, Jia, Suotang
• Format: Journal Article
• Language: English
• Published: 02.08.2021
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.428311

Beam splitting of high-order Gaussian (HOG) beams increases the channel capacity and improves the processing speed of the incoming information. Here a novel all-optical tunable multi-port HOG beam splitter under a periodic dielectric atomic structure is proposed and demonstrated. The original HOG beam is replicated in the output beams. A distinguishable five-port output beam is observed in the experiment, which is beneficial for high-speed optical communications. By tuning the optical properties of this periodic dielectric structure, the spatial position and intensity distribution of each output port are precisely controllable. The splitting ratio δ can be finely adjusted in the range 0 – 4.8. This work provides a new approach for multi-port HOG beam splitters and the basis for all-optical communication.