近日，比利时布鲁塞尔自由大学Gorza, Simon-Pierre团队报道了锁模奇偶时间对称激光器中的耗散孤子。这一研究成果发表在2026年2月2日出版的《自然—光子学》杂志上。

锁模激光器产生的光学相干超短脉冲推动了现代科学技术的革命性发展。这些脉冲通常源自耗散孤子的形成，其产生依赖于能量激发与耗散之间的动态平衡。

通过利用宇称-时间对称性调控这一平衡机制，研究组在线性耦合环形腔中实现了一种新型的激光耗散孤子。实验基于线性杂化模式处于PT对称相的激光系统展开，观测到短脉冲的形成过程——克尔非线性通过选择性打破PT对称性来稳定脉冲结构。该研究揭示了PT对称激光器中自发脉冲形成现象，为简化腔体设计的被动锁模技术开辟了新路径。

附：英文原文

Title: Dissipative solitons in mode-locked parity–time-symmetric lasers

Author: Yelo-Sarrin, Jess, Leo, Franois, Gorza, Simon-Pierre

Issue&Volume: 2026-02-02

Abstract: The generation of optically coherent ultrashort pulses by mode-locked lasers has revolutionized advancements in modern science and technology. These pulses often arise from the formation of dissipative solitons, which emerge due to a balance between energy excitation and dissipation. Harnessing the concept of parity–time (PT) symmetry to control this balance, we demonstrate a new type of laser dissipative soliton hosted in linearly coupled ring cavities. Our experiments are performed in a laser where the linear hybridized modes are in the PT-symmetric phase. Here we experimentally observe the formation of short pulses, stabilized by the selective breaking of the PT symmetry by Kerr nonlinearity. Our results unlock new possibilities for passive mode-locking by demonstrating spontaneous pulse formation in PT-symmetric lasers, which hold the potential for simple cavity designs.

DOI: 10.1038/s41566-025-01840-9

Source: https://www.nature.com/articles/s41566-025-01840-9