A wide field-of-view laser based white light transmitter for visible light communications

• Yuqi Hou, Zhichong Wang, Meixin Liu, Shulan Yi, Xiaoqian Wang, Liang Xia, Guangyi Liu, Jianyang Shi, Ziwei Li, Junwen Zhang, Nan Chi, and Chao Shen
• received 03/05/2024; accepted 04/23/2024; posted 04/25/2024; Doc. ID 522667
• Abstract: The advancement demands of high-speed wireless data link ask for higher requirements on visible light communication (VLC), where wide coverage stands as a critical criterion. Here, we present the design and implementation of a transmitter structure capable of emitting high-power wide-coverage white light laser. This laser source exhibits excellent stability, with an irradiation range extending to a half-angle of 20 degrees. Its high brightness satisfies the needs of indoor illumination while maintaining excellent communication performance. Utilizing bit-loading discrete multi-tone modulation, a peak data transmission rate of 3.24 Gbps has been achieved, spanning 1 to 5 meters. Remarkably, the data rates exceed 2.5 Gbps within a 40° range at a distance of 5 meters, enabling long-distance, wide coverage, high-speed VLC link for future mobile network applications.