Developments of pulse peak from peak-truncated Gaussian optical pulses in a serial array of high-Q ring resonators
Developments of pulse peak from peak-truncated Gaussian optical pulses in a serial array of high-Q ring resonators
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高 Q 环形谐振器串联阵列中截峰高斯光脉冲脉冲峰值的发展
DOI：
10.1103/physreva.102.043507
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Kota Yoshimura and Daiki Sugio
中科院分区：
文献类型：
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作者：
Makoto Tomita;Taichi Sudo;Kota Yoshimura and Daiki Sugio
我们实验研究了一个高斯形的时间脉冲通过一系列的环形谐振器阵列的传播，截断其峰值前的脉冲。我们观察到的过程中，一个平滑的脉冲峰值出现相关的高斯脉冲，即使当入射脉冲在其峰值之前被截断，作为脉冲通过环形谐振器的数量增加。峰值出现在负群时延积累超过脉冲截断时间点时。这一结果表明，在超光速脉冲中，输入脉冲包络的早期部分发展为平滑的高斯型脉冲峰，与基于瞬时谱的分析结果吻合得很好。我们还讨论了截断脉冲在慢光系统中的传输，在慢光系统中，尽管输入脉冲中有峰值，但输出脉冲中的峰值消失了。
We experimentally examined the propagation of a Gaussian-shaped temporal pulse through a serial array of ring resonators, truncating the pulse before its peak. We observed the process whereby a smooth pulse peak related to the Gaussian pulse emerged even when the incident pulse was truncated before its peak, as the pulse passed through an increasing number of ring resonators. The peak emerged when the negative group delay accumulated beyond the pulse truncation time point. This result demonstrated that the earlier portion of the input pulse envelope developed into a smooth Gaussian-shaped pulse peak in the superluminal pulse in good agreement with the analyses based on the instantaneous spectrum. We also discussed the propagation of truncated pulses in a slow light system, where the peak disappeared in the output pulse despite the peak in the input pulse.