Wang Jiawei, Li Xiang, Guo Xin, Loh Ter-Hoe, Ranno Luigi, Liu Chongyang, Wang Hong, Brian Sia Jia Xu
Opt Express. 2024 Jul 15;32(15):26751-26762. doi: 10.1364/OE.529952.
Silicon photonics, compatible with large-scale silicon manufacturing, is a disruptive photonic platform that has indicated significant implications in industry and research areas (e.g., quantum, neuromorphic computing, LiDAR). Cutting-edge applications such as high-capacity coherent optical communication and heterodyne LiDAR have escalated the demand for integrated narrow-linewidth laser sources. To that effect, this work seeks to address this requirement through the development of a high-performance hybrid III-V/silicon laser. The developed integrated laser utilizes a single microring resonator (MRR), demonstrating single-mode operation with a side mode suppression ratio (SMSR) exceeding 45 dB, with laser output power as high as 16.4 mW. Moving away from current hybrid/heterogeneous laser architectures that necessitate multiple complex controls, the developed laser architecture requires only two control parameters. Importantly, this serves to streamline industrial adoption by reducing the complexity involved in characterizing these lasers, at-scale. Through the succinct structure and control framework, a narrow laser linewidth of 2.79 kHz and low relative intensity noise (RIN) of -135 dB/Hz are achieved. Furthermore, optical data transmission at 12.5 Gb/s is demonstrated where a signal-to-noise ratio (SNR) of 10 dB is measured.
硅光子学与大规模硅制造工艺兼容，是一种具有颠覆性的光子平台，已在工业和研究领域（如量子、神经形态计算、激光雷达）显示出重大影响。诸如高容量相干光通信和外差激光雷达等前沿应用，对集成窄线宽激光源的需求不断增加。为此，本研究旨在通过开发高性能的III-V族/硅混合激光器来满足这一需求。所开发的集成激光器采用单个微环谐振器（MRR），实现了单模工作，边模抑制比（SMSR）超过45 dB，激光输出功率高达16.4 mW。与当前需要多个复杂控制的混合/异构激光架构不同，所开发的激光架构仅需要两个控制参数。重要的是，这有助于通过降低大规模表征这些激光器所涉及的复杂性来简化工业应用。通过简洁的结构和控制框架，实现了2.79 kHz的窄激光线宽和-135 dB/Hz的低相对强度噪声（RIN）。此外，还展示了12.5 Gb/s的光数据传输，测量得到的信噪比（SNR）为10 dB。
