High-Efficiency, Slow-Light Modulator on Hybrid Thin-Film Lithium Niobate Platform
Xingrui Huang, Yang Liu, Huan Guan, Zhiguo Yu, Manqing Tan, Zhiyong Li
Abstract
In this letter, we experimentally demonstrate the first slow-light Mach-Zehnder modulator (MZM) on a hybrid ithin-film Lithium Niobate platform. The Bragg grating waveguides are served as phase shifters, which enhance the modulation efficiency with the slow-light effect. Compared with large-signal modulation efficiency (V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">π</sub> · L = 0.67 V·cm) and an ultra-compact footprint (0.3 mm ×1.2 mm). Data transmission up to 60 Gbps and an on-chip insertion loss of 1.9 dB are also achieved. This modulator provides a potential solution for high-intensity integration, low-power transmission, and optical biosensing.