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Ultra-flat optical frequency comb generation based on amplitude modulator and Gaussian band-stop filter

机译：基于调幅器和高斯带阻滤波器的超平坦光频率梳产生

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摘要

A new scheme to generate ultra-flat optical frequency comb (OFC) with tunable frequency spacing is proposed and demonstrated based on an amplitude modulator driven by a digital periodic square-wave signal. A Gaussian band-stop filter is used to adjust flatness of the comb lines that generated from the amplitude modulator. The frequency spacing is adjusted by changing the period of the square-wave signal. The theoretical analysis model of the scheme is established and the relationship between the modulation index of the amplitude modulator and the flatness and power of OFC is studied. Through experiment simulations, it is shown that high-quality OFCs with the number of 32, 64, 128 comb lines, the tunable frequency spacing, and the flatness of 0.3 dB can be achieved.
机译：提出并演示了一种基于数字周期方波信号驱动的幅度调制器产生具有可调频率间隔的超平坦光学频率梳（OFC）的新方案。高斯带阻滤波器用于调整由幅度调制器生成的梳状线的平坦度。通过改变方波信号的周期来调整频率间隔。建立了该方案的理论分析模型，研究了调幅器的调制指数与OFC的平坦度和功率之间的关系。通过实验仿真表明，可以实现具有32、64、128条梳齿线，可调的频率间隔以及0.3 dB的平坦度的高质量OFC。

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