近日，美国科罗拉多大学教授Huang, Shu-Wei团队研究了交叉极化受激布里渊散射增强光子学。2025年5月20日，《自然—光子学》杂志发表了这一成果。

课题组研究了交叉极化受激布里渊散射（XP-SBS）及其与铌酸锂二次非线性的结合，以提高光子器件的性能。展示了三种新的应用：（1）通过XP-SBS的热光相位匹配，实现了具有0.7Hz窄线宽和40nm可调性的可重构受激布里渊激光器；（2）通过腔内布里渊增强四波混频实现55%转换效率的高效相干模式转换器；（3）布里渊二次激光器和频率梳在近红外和可见光波段工作，受益于XP-SBS和二次非线性之间的相互作用。 

这些进步有望大幅改善光子技术，包括窄线宽激光器、微梳产生和光信号处理，为更稳健和多功能的应用铺平道路。

附：英文原文

Title: Cross-polarized stimulated Brillouin scattering-empowered photonics

Author: Nie, Mingming, Musgrave, Jonathan, Huang, Shu-Wei

Issue&Volume: 2025-05-20

Abstract: This paper studies cross-polarized stimulated Brillouin scattering (XP-SBS) and its integration with quadratic nonlinearity in lithium niobate to enhance photonic device performance. Three novel applications are demonstrated: (1) a reconfigurable stimulated Brillouin laser with a 0.7-Hz narrow linewidth and 40-nm tunability, enabled by the thermo-optic phase matching of XP-SBS; (2) an efficient coherent mode converter achieving 55% conversion efficiency via intracavity Brillouin-enhanced four-wave mixing; (3) a Brillouin-quadratic laser and frequency comb operational in near-infrared and visible bands, benefiting from the interaction between XP-SBS and quadratic nonlinearity. These advancements promise substantial improvements in photonic technologies, including narrow-linewidth lasers, microcomb generation and optical signal processing, paving the way for more robust and versatile applications.

DOI: 10.1038/s41566-025-01680-7

Source: https://www.nature.com/articles/s41566-025-01680-7