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arXiv · 2405.09020

Scalable single-microring hybrid III-V/Si lasers for emerging narrow-linewidth applications

Jiawei Wang·Xiang Li·Xin Guo·Ter-Hoe Loh·Luigi Ranno·Chongyang Liu·Rusli·Hong Wang·Jia Xu Brian Sia
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Abstract

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 40 dB, with laser output power as high as 16.4 mW. Moving away from current hybrid/heterogeneous laser architectures that necessitate multiple complex control, 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.

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Jiawei Wang, Xiang Li, Xin Guo, Ter-Hoe Loh, Luigi Ranno, Chongyang Liu, Rusli, Hong Wang, Jia Xu Brian Sia. 2024-05-15. Scalable single-microring hybrid III-V/Si lasers for emerging narrow-linewidth applications. https://arxiv.org/abs/2405.09020

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