Zhou Tong, Sano Tyler, Wilcox Russell
Opt Lett. 2017 Nov 1;42(21):4422-4425. doi: 10.1364/OL.42.004422.
A novel coherent beam combiner, capable of combining large numbers of femtosecond pulse beams using two diffractive optics, is presented. The diffractive optic pair cancels pulse front tilt, while uncorrected dispersions are minimized. An example using four beams is modeled numerically and tested experimentally, demonstrating 120 fs pulses combined without degradation of pulse width. Scaling the concept, we show analytically that combining loss due to uncorrected dispersions is only a few percent for ∼200 beams with 130 fs pulses.
本文提出了一种新型相干光束合成器，它能够使用两个衍射光学元件来合成大量飞秒脉冲光束。该衍射光学元件对消除了脉冲前沿倾斜，同时将未校正的色散降至最低。以四束光为例进行了数值建模和实验测试，结果表明合成后的120飞秒脉冲的脉冲宽度没有退化。通过对该概念进行扩展，我们通过分析表明，对于具有130飞秒脉冲的约200束光，未校正色散导致的合成损耗仅为百分之几。
