Notaros Milica, DeSantis Daniel M, Raval Manan, Notaros Jelena
Opt Lett. 2023 Oct 15;48(20):5269-5272. doi: 10.1364/OL.494387.
In this Letter, we present the first, to the best of our knowledge, liquid-crystal-based integrated optical phased arrays (OPAs) that enable visible-light beam forming and steering. A cascaded OPA architecture is developed and experimentally shown to emit a beam in the far field at a 632.8-nm wavelength with a power full width at half maximum of 0.4°×1.6° and 7.2° beam-steering range within ±3.4 V. Furthermore, we show the first visible-light integrated-OPA-based free-space-optical-communications transmitter and use it to demonstrate the first integrated-OPA-based underwater-wireless-optical-communications link. We experimentally demonstrate a 1-Gbps on-off-keying link through water and an electronically-switchable point-to-multipoint link with channel selectivity greater than 19 dB through a water-filled tank.
在本信函中，据我们所知，我们首次展示了基于液晶的集成光学相控阵（OPA），它能够实现可见光光束的形成与转向。我们开发了一种级联OPA架构，并通过实验证明其在632.8纳米波长的远场发射光束，半高全宽功率为0.4°×1.6°，在±3.4伏电压范围内具有7.2°的光束转向范围。此外，我们展示了首个基于可见光集成OPA的自由空间光通信发射器，并用它演示了首个基于集成OPA的水下无线光通信链路。我们通过实验证明了通过水的1吉比特开关键控链路以及通过装满水的水箱实现的具有大于19分贝信道选择性的电子可切换点对多点链路。
