Add to BibSonomy
Abstract
Wireless data traffic is expected to exponentially increase in the future, and meeting this demand will require high data rate photonic-wireless links operating in the W-band (75–110 GHz). For this purpose, pulse-amplitude-modulation with four levels (PAM-4)-based intensity modulation and direct detection (IM-DD) photonic-wireless systems are preferred due to their simplified configuration. In this Letter, we present an experimental demonstration of an IM-DD PAM-4 photonic-wireless link in the W-band, leveraging a monolithic dual-laser photonic chip to enhance integration. Through injection-locking by an optical comb, the chip generates a W-band wireless signal via photo-mixing with a photodiode. This comb injection approach facilitates the phase correlation of the chip’s two modes, resulting in a stabilized beat note. Additionally, the on-chip integration of the dual lasers enables the modulation of the two modes with a single modulator, improving the signal-to-noise ratio (SNR) while eliminating the need for extra splitters or combiners. Meanwhile, the envelope detector (ED) plays a crucial role in the simplified configuration, contributing to the overall decrease in size, weight, power, and complexity of the system. The integration of the chip-based phase-locked light source and the utilization of the ED thus signify noteworthy features of our experimental setup, which functions without the necessity of both optical and electrical local oscillators. PAM-4 signal modulation is simultaneously applied to the two coherent optical carriers. Our experiments have effectively transmitted 5 and 10 Gbaud PAM-4 W-band wireless signals in a cost-effective, lightweight, and straightforward configuration, achieving a line data rate of up to 20 Gbit/s economically. These experimental results demonstrate the practical potential of implementing fully integrated photonic-wireless transmitters.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Hengxin Yan, Xinying Li, Xiaolong Pan, Tangyao Xie, Liye Fang, Jiahao Bi, Han Jiang, and Xiangjun Xin
Opt. Lett. 49(8) 1919-1922 (2024)
Jiaxuan Liu, Jianjun Yu, Xianming Zhao, Long Zhang, Xiongwei Yang, Yi Wei, Mingxu Wang, Bohan Sang, and Feng Zhao
Opt. Lett. 49(7) 1644-1647 (2024)
Shi Jia, Longsheng Li, Yan Fu, Leif Katsuo Oxenløwe, and Hao Hu
Opt. Express 29(11) 15969-15979 (2021)