Opt Lett. 2023 Mar 1;48(5):1335-1338. doi: 10.1364/OL.486428.
Multimode interference (MMI)-based power splitters are fundamental building blocks for integrated photonic devices consisting of an interferometer structure. In order to forestall the 'capacity crunch' in optical communications, integrated devices capable of operating in multiple spectral bands (e.g., the conventional telecom window and the emerging 2 µm wave band) have been proposed and are attracting increasing interest. Here, we demonstrate for the first time, to the best of our knowledge, the realization of a dual-band MMI-based 3 dB power splitter operating at the 1.55 and 2 µm wave bands. The fabricated power splitter exhibits low excess losses of 0.21 dB and 0.32 dB with 1 dB bandwidths for 1500-1600 nm and 1979-2050 nm, respectively.
基于多模干涉（MMI）的功率分配器是由干涉仪结构组成的集成光子器件的基本构建块。为了避免光通信中的“容量瓶颈”，已经提出了能够在多个光谱波段（例如传统的电信窗口和新兴的 2 µm 波段）中运行的集成器件，并且越来越受到关注。在这里，我们首次在我们所知的范围内证明了在 1.55 µm 和 2 µm 波段工作的双波段基于 MMI 的 3 dB 功率分配器的实现。所制造的功率分配器具有低的附加损耗，分别为 0.21 dB 和 0.32 dB，1 dB 带宽分别为 1500-1600 nm 和 1979-2050 nm。
