Harmonically mode-locked soliton fiber lasers have been intensively investigated in recent years due to their wide range of applications. Drawback of these lasers is relatively large timing jitter which is significantly higher than the timing jitter in lasers operating at fundamental frequency. We report the stabilizing frequency shift effect in harmonic mode-locking ring soliton fiber laser that is studied theoretically and numerically. It is known that a harmonic mode-locking regime in a fiber laser occurs due to interpulse repulsion, which leads to a uniform distribution of pulses in the cavity. We demonstrate that the frequency shift contributes to an increase in the hardness of interpulse interactions and can led to stabilization of the periodic arrangement of pulses. The experiment carried out confirms the theoretical predictions and the results of numerical simulation.

中文翻译：

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通过改变载波频率来稳定谐波锁模

近年来，由于谐波锁模孤子光纤激光器的广泛应用，人们对其进行了深入的研究。这些激光器的缺点是相对较大的定时抖动，其明显高于在基本频率下工作的激光器中的定时抖动。我们报告了理论和数值研究的谐波锁模环形孤子光纤激光器中的稳定移频效果。众所周知，由于脉冲间的排斥作用，会在光纤激光器中产生谐波锁模状态，从而导致空腔中脉冲的均匀分布。我们证明了频移有助于增加脉冲间相互作用的硬度，并可以导致脉冲的周期性排列的稳定。