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arXiv · 2104.13501

On-chip ultra-narrow-linewidth single-mode microlaser on lithium niobate on insulator

Renhong Gao·Jianglin Guan·Ni Yao·Li Deng·Jintian Lin·Min Wang·Lingling Qiao·Zhenhua Wang·Youting Liang·Yuan Zhou·Ya Cheng
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Abstract

We report an on-chip single mode microlaser with low-threshold fabricated on Erbium doped lithium niobate on insulator (LNOI). The single mode laser emission at 1550.5 nm wavelength is generated in a coupled photonic molecule, which is facilitated by Vernier effect when pumping the photonic molecule at 970 nm. A threshold pump power as low as 200 uW is demonstrated thanks to the high quality factor above 10^6. Moreover, the linewidth of the microlaser reaches 4 kHz, which is the best result in LNOI microlasers. Such single mode micro-laser lithographically fabricated on chip is highly in demand by photonic community.

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Renhong Gao, Jianglin Guan, Ni Yao, Li Deng, Jintian Lin, Min Wang, Lingling Qiao, Zhenhua Wang, Youting Liang, Yuan Zhou, Ya Cheng. 2021-04-27. On-chip ultra-narrow-linewidth single-mode microlaser on lithium niobate on insulator. https://doi.org/10.1364/ol.430015

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