Spatiotemporal mode-locked fiber lasers are a type of ultrafast lasers for which the longitudinal and transverse modes of the multimode fiber cavities are locked via nonlinear interaction in the cavity. Here we report the experimental realization of a spatiotemporally mode-locked fiber laser with self-similar pulse evolution. The multimode fiber oscillator generates parabolic pulses at 1030 nm with 90 mW average power, a near-Gaussian beam quality ($M^2\le 1.4$), and 2.3 ps (192 fs externally dechirped) pulse duration. Numerical simulations confirm the experimental observations of self-similar pulse propagation. These results will enable further investigation of nonlinear dynamics in spatiotemporal mode-locked fiber lasers.

中文翻译：

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时空自相似光纤激光器

时空锁模光纤激光器是一种超快激光器，其多模光纤腔的纵向和横向模通过腔中的非线性相互作用被锁定。在这里，我们报告了具有自相似脉冲演化的时空锁模光纤激光器的实验实现。多模光纤振荡器在1030 nm处产生抛物线形脉冲，平均功率为90 mW，光束质量接近高斯（${\mathrm{中号}}^{\mathrm{2个}}\le 1.4$）和2.3 ps（外部去提192 fs）脉冲持续时间。数值模拟证实了自相似脉冲传播的实验观察。这些结果将能够进一步研究时空锁模光纤激光器中的非线性动力学。