Amplitude-phase decorrelation: a method for reducing intensity noise in semiconductor lasers
Amplitude-phase decorrelation: a method for reducing intensity noise in semiconductor lasers
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幅度相位去相关：一种降低半导体激光器强度噪声的方法
DOI：
10.1109/3.73536
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发表时间：
1991
影响因子：
2.5
通讯作者：
K. Vahala
中科院分区：
文献类型：
--
作者：
M. Newkirk;K. Vahala
结果表明，用幅相去相关的方法可以在较宽的带宽上使半导体激光器的基波强度噪声底值降低1/(1+α/sup 2/)，其中α是线宽增强因子。该方法使用色散元件将相位噪声转换为强度噪声。这项技术最近被证明是通过将分布反馈(DFB)激光器的强度噪声降低到比其固有水平低7db的程度来实现的。在目前的工作中，作者通过刻画降噪的频率相关性扩展了这些结果。最佳折减在光谱的平坦区实现，并在接近弛豫共振的较高频率时减小。还研究了涨落的相关性质。>；
It has been shown that the method of amplitude-phase decorrelation can reduce the fundamental intensity noise floor of semiconductor laser light over a wide bandwidth by the ratio 1/(1+ alpha /sup 2/), where alpha is the linewidth enhancement factor. The method uses a dispersive element to convert phase noise into intensity noise. This technique was recently demonstrated by reducing intensity noise from a DFB (distributed feedback) laser as much as 7 dB below its intrinsic level. In the present work, the authors extend these results by characterizing the frequency dependence of the noise reduction. Optimum reduction is achieved in the flat region of the spectrum and diminishes at higher frequencies approaching the relaxation resonance. The correlation properties of the fluctuations are also investigated. >