Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications, Montreal, Quebec, Canada.
Opt Lett. 2011 Sep 15;36(18):3557-9. doi: 10.1364/OL.36.003557.
We propose and experimentally demonstrate a novel design for temporal integration of microwave and optical intensity waveforms with combined high processing speed and a long operation time window. It is based on concatenating in series a discrete-time (low-speed) photonic integrator and a high-speed analog time-limited intensity integrator. This scheme is demonstrated here using a cascaded fiber-based interferometers' system (as a passive eight-point discrete-time integrator) and an analog time-limited intensity integrator. The latter is based on temporal intensity modulation of the input waveform with a rectangular-like incoherent energy spectrum followed by linear dispersion. Using this setup, we experimentally achieve accurate time integration of intensity signals with ~36 GHz bandwidths over an operation time window of ~4 ns, corresponding to a processing time-bandwidth product of >144.
我们提出并实验演示了一种新颖的设计，用于实现微波和光强波形的时间积分，具有高速处理速度和长的操作时间窗口。它基于串联一个离散时间（低速）光子积分器和一个高速模拟限时强度积分器。本文通过级联光纤干涉仪系统（作为一个无源的八点离散时间积分器）和一个模拟限时强度积分器来演示这种方案。后者基于输入波形的时间强度调制，具有矩形非相干能谱，然后是线性色散。使用这个设置，我们在大约 4ns 的操作时间窗口内，实验实现了高达 36GHz 带宽的强度信号的精确时间积分，对应的处理时间带宽积超过 144。
