Microdisk lasers on an erbium-doped lithium-niobite chip

• Published in: Science China. Physics, mechanics & astronomy Vol. 64; no. 3; p. 234263
• Main Authors: Luo, Qiang, Hao, ZhenZhong, Yang, Chen, Zhang, Ru, Zheng, DaHuai, Liu, ShiGuo, Liu, HongDe, Bo, Fang, Kong, YongFa, Zhang, GuoQuan, Xu, JingJun
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.03.2021; Springer; Springer Nature B.V
• Subjects: Astronomy; Classical and Continuum Physics; Erbium; Inductively coupled plasma; Lasers; Lithium; Lithium niobate; Lithium niobates; Observations and Techniques; Photonics; Physics; Physics and Astronomy; Reactive ion etching; Technology application; lithium niobite; microcavities; laser; LNOI
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-020-1637-8

Lithium niobate on insulator (LNOI) provides a platform for the fundamental physics investigations and practical applications of integrated photonics. However, as an indispensable building block of integrated photonics, lasers are in short supply. In this paper, erbium-doped LNOI laser in the 1550-nm band was demonstrated in microdisk cavities with high quality factors fabricated in batches by UV exposure, inductively coupled plasma reactive ion etching, and chemomechanical polishing. The threshold and conversion efficiency of the erbium-doped LNOI microdisk laser were measured to be lower than 1 mW and 6.5×10 −5 %, respectively. This work will benefit the development of integrated photonics based on LNOI.