Yi Qiyuan, Pan An, Xia Jinsong, Zeng Cheng, Shen Li
Opt Lett. 2023 Oct 15;48(20):5375-5378. doi: 10.1364/OL.498536.
The 3 dB power splitters are fundamental building blocks for integrated photonic devices. As data capacity requirements continue to rise, there is a growing interest in integrated devices that can accommodate multiple spectral bands, including the conventional O-, C-, and L-bands, and the emerging 2 µm band. Here we propose and experimentally demonstrate a 3 dB power splitter based on adiabatic mode evolution using a thin-film lithium niobate, with ultra-broadband operation bandwidth from 1200 to 2100 nm. The fabricated power splitter exhibits low insertion losses of 0.2, 0.16, and 0.53 dB for wavelengths at 1310, 1550, and 2000 nm, respectively. The measured 1 dB bandwidth covers 1260-1360, 1480-1640, and 1930-2030 nm, which we believe that the proposed device is capable of operating in both O-, C-, L-, and 2 µm bands.
3分贝功率分配器是集成光子器件的基本构建模块。随着数据容量需求持续增长，人们对能够容纳多个光谱波段的集成器件越来越感兴趣，这些波段包括传统的O波段、C波段和L波段，以及新兴的2微米波段。在此，我们提出并通过实验证明了一种基于薄膜铌酸锂绝热模式演化的3分贝功率分配器，其具有从1200至2100纳米的超宽带工作带宽。所制备的功率分配器在1310纳米、1550纳米和2000纳米波长处的插入损耗分别为0.2分贝、0.16分贝和0.53分贝。测得的1分贝带宽覆盖1260 - 1360纳米、1480 - 1640纳米和1930 - 2030纳米，我们认为所提出的器件能够在O波段、C波段、L波段和2微米波段工作。
