High-power, low-noise Brillouin laser on a silicon chip

We realize a chip-based Brillouin microlaser with remarkable features of high power and low noise using a microtoroid resonator. Our Brillouin microlaser is able to output a power of up to 126 mW with a fundamental linewidth down to 245 mHz. Additionally, in the course of Brillouin lasing we observe...

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Veröffentlicht in:Optics letters 2022-04, Vol.47 (7), p.1638-1641
Hauptverfasser: Qin, Yingchun, Ding, Shulin, Zhang, Menghua, Wang, Yunan, Shi, Qi, Li, Zhixuan, Wen, Jianming, Xiao, Min, Jiang, Xiaoshun
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Sprache:eng
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Zusammenfassung:We realize a chip-based Brillouin microlaser with remarkable features of high power and low noise using a microtoroid resonator. Our Brillouin microlaser is able to output a power of up to 126 mW with a fundamental linewidth down to 245 mHz. Additionally, in the course of Brillouin lasing we observe an intriguing power saturation-like effect, which can be attributed to complex thermo-optic-effect-induced mode mismatch between the pump and Brillouin modes. To have a quantitative understanding of this phenomenon, we develop a model by simultaneously considering Brillouin lasing and the thermo-optic effect occurring in the microcavity. Of importance, our theoretical results match well with experimentally measured data.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.455369