近日，陕西师范大学邹德峰团队研究了超高速光纤激光器中双频驱动孤子分子的级联非线性动力学。2026年2月26日出版的《物理评论A》杂志发表了这项成果。

锁模光纤激光器的最新进展使得观察孤子分子内部动力学成为可能，揭示了其与非线性系统中束缚态的深刻相似性。然而，先前的研究主要集中于被动表征，这限制了对孤子分子内部丰富非线性耦合层次的探索。

研究组通过引入双频驱动方案，在非线性薛定谔方程框架内主动激发并操控孤子分子的内部自由度，拓展了研究边界。该方案揭示了脉冲间隔的复杂时间调制和级联射频响应，阐明了分子内非线性相互作用的多层结构。此外，通过与量子极限定时噪声的耦合进一步验证了这些动力学特性，为耗散孤子分子在超快光子学中的可控操纵与信息编码应用提供了新见解。

附：英文原文

Title: Cascaded nonlinear dynamics of dual-frequency-driven soliton molecules in an ultrafast fiber laser

Author: Defeng Zou, Penglai Guo, Yihong Xiao, Minghui Niu, Qiuying Ma, Hong Dang, Xiaohui Li, Perry Ping Shum

Issue&Volume: 2026/02/26

Abstract: Recent advances in mode-locked fiber lasers have enabled observation of the internal dynamics of soliton molecules, revealing their strong analogy to bound states in nonlinear systems. However, previous studies have mostly focused on passive characterization, limiting access to the rich hierarchy of nonlinear couplings within soliton molecules. Here we extend the frontier by introducing a dual-frequency-driving scheme that actively excites and manipulates the internal degrees of freedom of soliton molecules within the nonlinear Schrdinger equation framework. This approach uncovers complex temporal modulations and cascaded radio-frequency responses of the pulse separation, revealing the multilayered structure of intramolecular nonlinear interactions. Furthermore, these dynamics are further validated through coupling to quantum-limited timing noise, providing insights for controlled manipulation and information-encoding applications of dissipative soliton molecules in ultrafast photonics.

DOI: 10.1103/35dn-vnsf

Source: https://journals.aps.org/pra/abstract/10.1103/35dn-vnsf