Park Yongwoo, Azaña José
Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications (INRS-EMT), Varennes, Québec, J3X 1S2, Canada.
Opt Lett. 2009 Apr 15;34(8):1156-8. doi: 10.1364/ol.34.001156.
A method for ultrafast photonic time-intensity integration of an arbitrary temporal waveform is, for the first time to our knowledge, proposed and demonstrated. The introduced intensity-integration concept is based on the superposition of mutually incoherent, continuously-time-delayed replicas of the optical intensity waveform to be processed. This idea is practically implemented using optical intensity modulation of the input waveform with a rectangularlike incoherent energy spectrum distribution followed by linear dispersion. The key design specifications of the proposed integration scheme are derived and discussed. Proof-of-concept experiments are performed demonstrating accurate integration of several duration-limited microwave and optical intensity waveforms with time features from the picosecond to the subnanosecond range.
据我们所知，首次提出并演示了一种用于对任意时间波形进行超快光子时间强度积分的方法。所引入的强度积分概念基于待处理光强波形的相互非相干、连续时间延迟副本的叠加。该想法通过对具有矩形非相干能谱分布的输入波形进行光强调制，然后进行线性色散来实际实现。推导并讨论了所提出积分方案的关键设计规范。进行了概念验证实验，证明了对几个具有皮秒到亚纳秒范围内时间特征的持续时间受限的微波和光强波形进行了精确积分。
