Intrinsic amplitude-noise suppression in fiber lasers mode-locked with nonlinear amplifying loop mirrors.
Intrinsic amplitude-noise suppression in fiber lasers mode-locked with nonlinear amplifying loop mirrors.
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DOI：
10.1364/ol.415718
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发表时间：
2020-10
期刊：
影响因子：
3.6
通讯作者：
Marvin Edelmann;Y. Hua;K. Şafak;F. Kärtner
中科院分区：
文献类型：
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作者：
Marvin Edelmann;Y. Hua;K. Şafak;F. Kärtner
在本文中，我们研究了具有固有幅度噪声抑制机制的非线性放大环镜锁模光纤激光器的稳态。由于正弦传输函数与脉动的腔内脉冲幅度的相互作用，我们证明了在特定的前提条件下，这一机制可能导致激光在反射和传输输出端处的相对强度噪声存在可检测到的差异。我们提出了一种基于非线性光纤的系统强度噪声测量方法，该系统在激光腔中重复一次往返。实验结果和模拟结果清楚地表明，在某些稳态情况下，腔内幅度波动最大可减小4d B。
In this Letter, we investigate steady states of fiber lasers mode-locked with a nonlinear amplifying loop mirror that have an inherent amplitude-noise-suppression mechanism. Due to the interaction of the sinusoidal transmission function with the fluctuating intracavity pulse amplitude, we show that under specific preconditions, this mechanism may lead to a detectable difference in relative intensity noise at the reflected and transmitted output port of the laser. We present systematic intensity noise measurements with a nonlinear fiber-based system that replicates a single roundtrip in the laser cavity. The experimental results and simulations clearly show a reduction of the intracavity amplitude fluctuations up to 4 dB for certain steady states.