Notaros Milica, Coleto Andres Garcia, Raval Manan, Notaros Jelena
Opt Lett. 2024 Feb 15;49(4):1041-1044. doi: 10.1364/OL.511189.
In this Letter, we propose and experimentally demonstrate the first, to our knowledge, integrated liquid-crystal-based (LC-based) variable-tap devices for visible-light amplitude modulation. These devices leverage the birefringence of LC medium to actively tune the coupling coefficient between two waveguides. First, we develop the device structure, theory of operation, and design procedure. Next, we summarize the fabrication and LC packaging procedure for these devices. Finally, we experimentally demonstrate amplitude modulation with 15.4-dB tap-port extinction within ±3.1 V for a 14-µm-long device at a 637-nm operating wavelength. These small-form-factor variable-tap devices provide a compact and low-power solution to integrated visible-light amplitude modulation and will enable future high-density integrated visible-light systems.
在本信函中，据我们所知，我们首次提出并通过实验证明了用于可见光幅度调制的基于集成液晶（LC）的可变抽头器件。这些器件利用液晶介质的双折射来主动调节两个波导之间的耦合系数。首先，我们开发了器件结构、工作原理和设计流程。接下来，我们总结了这些器件的制造和液晶封装流程。最后，我们通过实验证明，对于一个14微米长、工作波长为637纳米的器件，在±3.1伏电压范围内，抽头端口消光比为15.4分贝时可实现幅度调制。这些小尺寸可变抽头器件为集成可见光幅度调制提供了一种紧凑且低功耗的解决方案，并将推动未来高密度集成可见光系统的发展。
