Integrated microlasers and optical frequency comb generated from weakly pertubed microdisks on thin-film lithium niobate

Renhong Gao; Jianglin Guan; Chuntao Li; Botao Fu; Jintian Lin; Ya Cheng

doi:10.1117/12.2689823

26 November 2023 Integrated microlasers and optical frequency comb generated from weakly pertubed microdisks on thin-film lithium niobate

Renhong Gao, Jianglin Guan, Chuntao Li, Botao Fu, Jintian Lin, Ya Cheng

Author Affiliations +

Proceedings Volume 12775, Quantum and Nonlinear Optics X; 127751O (2023) https://doi.org/10.1117/12.2689823
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

We demonstrate monolithically integrated on-chip single-frequency micro-disk lasers coupled with bus-waveguides fabricated on active lithium niobate platform by photolithography assisted chemo-mechanical etching. Benefiting from the high-Q factors, long cavity lengths of 1 mm for high absorption of pump light, and the elegant control on the modes formed within the large microdisk by breaking the centrosymmetry of the microdisk cavities, a microdisk laser with a narrow linewidth of 0.11MHz and a maximum output power of 62.1uW has been achieved at room temperature. Moreover, soliton optical frequency generation has been observed from square modes in weakly perturbed pure lithium niobate microdisks with a diameter of ~125um, a thickness of about 860nm and a wedge angle of 21 degrees. The solition optical frequency comb covered a bandwidth from 1450nm to 1650nm when pumped at 1542nm wavelength, suffering from the mode crossing of the dense whispering gallery modes.

Citation Download Citation

Renhong Gao, Jianglin Guan, Chuntao Li, Botao Fu, Jintian Lin, and Ya Cheng "Integrated microlasers and optical frequency comb generated from weakly pertubed microdisks on thin-film lithium niobate", Proc. SPIE 12775, Quantum and Nonlinear Optics X, 127751O (26 November 2023); https://doi.org/10.1117/12.2689823

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