Spatiotemporal nonlinear dynamics in multimode fiber laser based on carbon nanotubes
Jingxuan Sun1, Yachen Wang1, Congyu Zhang1, Lijun Xu1, Bo Fu1,2()
1. Key Laboratory of Precision Opto-Mechatronics Technology, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China 2. Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, School of Engineering Medicine, Beihang University, Beijing 100191, China
We investigated 1-μm multimode fiber laser based on carbon nanotubes, where multiple typical pulse states were observed, including Q-switched, Q-switched mode-locked, and spatiotemporal mode-locked pulses. Particularly, stable spatiotemporal mode-locking was realized with a low threshold, where the pulse duration was 37 ps and the wavelength was centred at 1060.5 nm. Moreover, both the high signal to noise and long-term operation stability proved the reliability of the mode-locked laser. Furthermore, the evolution of the spatiotemporal mode-locked pulses in the cavity was also simulated and discussed. This work exhibits the flexible outputs of spatiotemporal phenomena in multimode lasers based on nanomaterials, providing more possibilities for the development of high-dimensional nonlinear dynamics.
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