Institut für Hochfrequenztechnik, Hochschule für Telekommunikation, Gustav-Freytag Strasse 43-45, D-04277 Leipzig, Germany.
Opt Lett. 2010 Nov 1;35(21):3592-4. doi: 10.1364/OL.35.003592.
We propose and demonstrate a method for quasi storage of light based on periodic spectral filtering realized in the time domain by amplitude modulation using frequency-to-time conversion. The delay can be tuned in a wide range by changing the frequency of an electrical modulation signal. In our experiments, the delay of single 2.5 ps pulses varied by 66 pulse widths. The technique works equally well for more complex optical data packets. Contrary to known approaches, the method has a very large spectral bandwidth and can be implemented by either fiber or integrated solutions using existing technologies. Because of the large bandwidth, fractional delays up to several tens of thousands of pulse widths can be achieved potentially for subpicosecond pulses, which is a tremendous value regarding the implementation simplicity.
我们提出并演示了一种基于周期性光谱滤波的光准存储方法，该方法通过使用频率到时间转换的振幅调制在时域中实现。通过改变电调制信号的频率，可以在很宽的范围内调谐延迟。在我们的实验中，单个 2.5 ps 脉冲的延迟变化了 66 个脉冲宽度。该技术对于更复杂的光数据包同样有效。与已知方法不同，该方法具有非常大的光谱带宽，可以通过使用现有技术的光纤或集成解决方案来实现。由于带宽大，对于亚皮秒脉冲，潜在地可以实现高达数千个脉冲宽度的分数延迟，这对于实现的简单性来说是一个巨大的价值。
