Abstract

Lithium niobate on insulator (LNOI), regarded as an important candidate platform for optical integration due to its excellent nonlinear, electro-optic, and other physical properties, has become a research hotspot. A light source, as an essential component for an integrated optical system, is urgently needed. In this Letter, we reported the realization of 1550 nm band on-chip LNOI microlasers based on erbium-doped LNOI ring cavities with loaded quality factors higher than 1 million at ${\sim}{{970}}\;{\rm{nm}}$, which were fabricated by using electron beam lithography and inductively coupled plasma reactive ion etching processes. These microlasers demonstrated a low pump threshold of ${\sim}{{20}}\;{\unicode{x00B5}}{\rm{W}}$ and stable performance under the pump of a 980 nm band continuous laser. Comb-like laser spectra spanning from 1510 to 1580 nm were observed in a high pump power regime, which lays the foundation of the realization of pulsed laser and frequency combs on a rare-earth ion-doped LNOI platform. This Letter effectively promotes the development of on-chip integrated active LNOI devices.

© 2021 Optical Society of America

Integrated ytterbium-doped lithium niobate microring lasers

Qiang Luo, Chen Yang, Zhenzhong Hao, Ru Zhang, Rui Ma, Dahuai Zheng, Hongde Liu, Xuanyi Yu, Feng Gao, Fang Bo, Yongfa Kong, Guoquan Zhang, and Jingjun Xu
Opt. Lett. 47(6) 1427-1430 (2022)

Efficient erbium-doped thin-film lithium niobate waveguide amplifiers

Zhaoxi Chen, Qing Xu, Ke Zhang, Wing-Han Wong, De-Long Zhang, Edwin Yue-Bun Pun, and Cheng Wang
Opt. Lett. 46(5) 1161-1164 (2021)

Single-frequency integrated laser on erbium-doped lithium niobate on insulator

Zeyu Xiao, Kan Wu, Minglu Cai, Tieying Li, and Jianping Chen
Opt. Lett. 46(17) 4128-4131 (2021)

On-chip erbium–ytterbium-co-doped lithium niobate microdisk laser with an ultralow threshold

Qiang Luo, Chen Yang, Zhenzhong Hao, Ru Zhang, Rui Ma, Dahuai Zheng, Hongde Liu, Xuanyi Yu, Feng Gao, Fang Bo, Yongfa Kong, Guoquan Zhang, and Jingjun Xu
Opt. Lett. 48(13) 3447-3450 (2023)

On-chip microdisk laser on Yb³⁺-doped thin-film lithium niobate

Yuan Zhou, Zhe Wang, Zhiwei Fang, Zhaoxiang Liu, Haisu Zhang, Difeng Yin, Youting Liang, Zhihao Zhang, Jian Liu, Ting Huang, Rui Bao, Rongbo Wu, Jintian Lin, Min Wang, and Ya Cheng
Opt. Lett. 46(22) 5651-5654 (2021)