Integrated active lithium niobate photonic devices. (1st April 2023)

• Record Type: Journal Article
• Authors: Wang, Min; Fang, Zhiwei; Lin, Jintian; Wu, Rongbo; Chen, Jinming; Liu, Zhaoxiang; Zhang, Haisu; Qiao, Lingling; Cheng, Ya
• Is Part Of: Japanese journal of applied physics. Volume 62:Number SC(2023)
• Publication Date: 2023-04-01
• Subjects: photonic integration -- thin film lithium niobate -- active device; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/aca986
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We report on the fabrication of integrated active lithium niobate (LN) photonic devices such as waveguide amplifiers and tunable lasers using the photolithography-assisted chemo-mechanical etching (PLACE) technique. Specifically, a maximum internal net gain exceeding 20 dB is achieved in the LN waveguide amplifier, and an electro-optically tunable single-frequency laser with an ultra-narrow linewidth of 454.7 Hz is demonstrated in a high-Q LN microdisk. An electrically driven microring laser is demonstrated by the monolithic integration of a diode laser with an LN microring resonator. We also realize a hybrid integration of passive and active LN microdevices using a continuous lithographic processing approach. The integrated active LN photonic devices have a broad range of applications in light-wave communication, precision sensing and quantum information science.