Liu Haiyan, Xu Lufeng, Zhang Zexin, Song Yanrong, Tian Jinrong
Opt Express. 2024 Feb 12;32(4):6791-6799. doi: 10.1364/OE.515733.
Realtime spectroscopy access to ultrafast fiber lasers provides new opportunities for exploring complex soliton interaction dynamics. In this study, we employ a time-stretch technique that enables real-time access to both spectral and temporal dynamics, revealing rich nonlinear processes in asynchronous dual wavelength mode-locked pulses in an ultrafast fiber laser. Due to the different group velocities of the two wavelengths, the mode-locked solitons centered at different wavelengths periodically collide with each other. We recorded the entire process of soliton establishment, stabilization, and disappearance, shedding light on the mystery of stable transmission of dual-wavelength mode-locked pulses. These processes were observed for the first time in an ultrafast fiber laser, and the experimental evidence provides important insights into the understanding of nonlinear dynamics in fiber lasers, as well as the potential for improving laser performance for application in dual-comb spectroscopy.
对超快光纤激光器进行实时光谱分析为探索复杂孤子相互作用动力学提供了新机会。在本研究中，我们采用了一种时间拉伸技术，该技术能够实时获取光谱和时间动态，揭示了超快光纤激光器中异步双波长锁模脉冲丰富的非线性过程。由于两个波长的群速度不同，以不同波长为中心的锁模孤子会周期性地相互碰撞。我们记录了孤子的建立、稳定和消失的全过程，揭示了双波长锁模脉冲稳定传输的奥秘。这些过程首次在超快光纤激光器中被观察到，实验证据为理解光纤激光器中的非线性动力学以及改善双梳光谱应用中的激光性能潜力提供了重要见解。
