Hybrid integrated modulation bandwidth enhanced laser based on self-injection locking to an external high-Q microring reflector

Shuai Shao; Yunhao Wu; Jiachen Li; Sigang Yang; Hongwei Chen; Minghua Chen

doi:10.1117/12.2599387

9 October 2021 Hybrid integrated modulation bandwidth enhanced laser based on self-injection locking to an external high-Q microring reflector

Shuai Shao, Yunhao Wu, Jiachen Li, Sigang Yang, Hongwei Chen, Minghua Chen

Author Affiliations +

Proceedings Volume 11891, Semiconductor Lasers and Applications XI; 118910T (2021) https://doi.org/10.1117/12.2599387
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

We demonstrate a hybrid integrated laser with nearly two folds of direct modulation bandwidth enhancement and 150 folds of linewidth reduction, by introducing the photon-photon resonance effect and self-injection locking effect to a commercial DFB laser simultaneously through an external high-Q silicon nitride microring reflector (MRR). Different from the widely studied passive feedback lasers, the proposed high-Q MRR keeps the DFB laser in the strong self-injection locking state, which can achieve stable narrow linewidth single-mode output with high Side-Mode Suppression Ratio. After packaging the proposed hybrid laser, we measure its direct modulation bandwidth and linewidth, which are increased from 7.70GHz to 15.28GHz, and reduced from 600kHz to 4kHz, respectively. This work explores a compact footprint and low-cost modulation bandwidth enhancement and linewidth reduction scheme for many applications such as high-speed coherent optical communication and microwave photonics.

Citation Download Citation

Shuai Shao, Yunhao Wu, Jiachen Li, Sigang Yang, Hongwei Chen, and Minghua Chen "Hybrid integrated modulation bandwidth enhanced laser based on self-injection locking to an external high-Q microring reflector", Proc. SPIE 11891, Semiconductor Lasers and Applications XI, 118910T (9 October 2021); https://doi.org/10.1117/12.2599387

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