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腔长漂移是引起主动锁模光纤激光器不稳定的一个主要原因。通过理论分析得出了主动锁模光纤激光器输出脉冲相位噪声和腔长漂移的关系，并采用抑制相位噪声的方法实现了主动锁模光纤激光器长达８小时的稳定工作。
Cavity length drift is a major cause of instability of actively mode-locked fiber lasers. The relationship between the output pulse phase noise and the cavity length drift of the active mode - locked fiber laser was obtained through theoretical analysis. The phase - locked noise suppression method was used to realize the active mode - locked fiber laser up to 8 hours.