Feng Feng, Sangwongngam Paramin, Faulkner Grahame, O'Brien Dominic
Opt Lett. 2019 Dec 15;44(24):6009-6012. doi: 10.1364/OL.44.006009.
We present wide field-of-view (FOV) bi-directional point-to-multipoint indoor optical wireless communications operating over a range of 4 m. The system is designed to integrate with fiber-to-the-home/building networks realized by a passive optical network. A phase-only spatial light modulator (SLM)-based beam steering base station with a ±30° FOV broadcasts downstream transmissions to two nomadic user terminals that use mirror-based beam steering to provide a ±50° FOV. At the base station, a composite phase mask is constructed on the SLM not only to perform optical broadcasting, but also to steer upstream optical transmissions from user terminals at a different wavelength. Successful upstream and downstream data transmission of 25 Gbit/s PAM4 is achieved.
我们展示了一种工作在4米范围内的宽视场（FOV）双向点对多点室内光无线通信系统。该系统旨在与由无源光网络实现的光纤到家庭/建筑物网络集成。一个基于纯相位空间光调制器（SLM）的波束转向基站，其视场为±30°，将下行传输广播到两个游牧用户终端，这两个终端使用基于反射镜的波束转向来提供±50°的视场。在基站，在SLM上构建一个复合相位掩模，不仅用于执行光广播，还用于在不同波长下引导来自用户终端的上行光传输。实现了25 Gbit/s PAM4的成功上行和下行数据传输。
