We numerically investigate the stability of a dispersion-managed mode-locked Yb-doped fiber laser of near-zero net cavity dispersion. The instability is primarily due to the filtering effect of the chirped fiber Bragg grating. The size of the unstable region is dependent on the modulation depth of the saturable absorbers. At modulation depth higher than 30%, stable mode-locking can operate throughout the dispersion region. Based on the simulation results, stable mode-locking around zero cavity dispersion is experimentally viable by a SESAM with a 34% modulation depth. The fiber laser can generate laser pulses with a 17-nm spectral bandwidth and a 139-fs dechirped pulse duration.

中文翻译：

---

走向具有零腔净色散的稳定色散管理锁模掺Yb光纤激光器

我们数值研究近零净腔扩散的色散管理锁模掺Yb光纤激光器的稳定性。该不稳定性主要是由于fiber光纤布拉格光栅的滤波效果。不稳定区域的大小取决于可饱和吸收体的调制深度。在高于30％的调制深度下，稳定的锁模可以在整个色散区域内运行。根据仿真结果，采用34％调制深度的SESAM在实验上可以实现围绕零腔色散的稳定锁模。光纤激光器可以产生具有17 nm光谱带宽和139 fs的去脉冲周期的激光脉冲。