Abstract In the present work, we demonstrated a mode-locked polarization-maintaining (PM) Yb-doped fiber laser based on the figure-of-nine configuration to generate ∼ 100 fs pulses at 1 μ m . For the dispersion management, a pair of gratings was inserted into the laser resonator to compensate the group delay dispersion (GDD). The stable, self-started passive mode-locking operation was realized with a pulse duration of 122 fs and a full width at half maximum (FWHM) spectral width of 14.1 nm (3 dB bandwidth). The output power was 21 mW at a repetition rate of 34.4 MHz, corresponding to a pulse energy of 0.61 nJ and a peak power of 4.85 kW. Moreover, the theoretical investigation based on the nonlinear Schrodinger equation was implemented to explore the mode-locking properties. Numerical analyses were almost in agreement with the experimental results.

中文翻译：

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九字形锁模飞秒保偏掺镱光纤激光器

摘要 在目前的工作中，我们展示了一种基于 9 字形配置的锁模保偏 (PM) 掺镱光纤激光器，可在 1 μ m 处产生 ~ 100 fs 脉冲。对于色散管理，将一对光栅插入激光谐振腔以补偿群延迟色散 (GDD)。稳定、自启动的被动锁模操作是通过 122 fs 的脉冲持续时间和 14.1 nm（3 dB 带宽）的半高全宽 (FWHM) 谱宽实现的。输出功率为 21 mW，重复频率为 34.4 MHz，对应的脉冲能量为 0.61 nJ，峰值功率为 4.85 kW。此外，基于非线性薛定谔方程的理论研究被实施以探索锁模特性。数值分析与实验结果几乎一致。