Self-calibrating d-scan: measuring ultrashort laser pulses on-target using an arbitrary pulse compressor.
Self-calibrating d-scan: measuring ultrashort laser pulses on-target using an arbitrary pulse compressor.
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DOI：
10.1038/s41598-018-21701-6
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发表时间：
2018-02-19
影响因子：
4.6
通讯作者：
Crespo H
中科院分区：
文献类型：
--
作者：
Alonso B;Sola ÍJ;Crespo H
在超短脉冲激光器的大多数应用中，时间压缩器用于在目标或样品中实现期望的脉冲持续时间，并且精确的时间表征是重要的。色散扫描（d-扫描）脉冲表征技术通常涉及使用玻璃光楔赋予脉冲可变的、明确定义的色散量，同时测量由这些脉冲产生的非线性信号的频谱。这对于宽带少周期脉冲非常有效，但是更长、更窄带宽的脉冲更难以以这种方式测量。在这里，我们展示了自校准d-扫描的概念，它扩展了d-扫描技术的适用性，任意持续时间的脉冲，使其完整的测量，而无需事先了解所引入的分散。特别是，我们表明，脉冲压缩器已经在啁啾脉冲放大（CPA）系统中使用，可以用来同时压缩和测量的时间分布的输出脉冲在目标上以一种简单的方式，而不需要额外的诊断或校准，而在同一时间校准的压缩机本身往往是未知的差分色散。我们证明了该技术通过模拟和实验在已知条件下。最后，我们将其应用于CPA激光器的27.5 fs脉冲的测量和压缩。
In most applications of ultrashort pulse lasers, temporal compressors are used to achieve a desired pulse duration in a target or sample, and precise temporal characterization is important. The dispersion-scan (d-scan) pulse characterization technique usually involves using glass wedges to impart variable, well-defined amounts of dispersion to the pulses, while measuring the spectrum of a nonlinear signal produced by those pulses. This works very well for broadband few-cycle pulses, but longer, narrower bandwidth pulses are much more difficult to measure this way. Here we demonstrate the concept of self-calibrating d-scan, which extends the applicability of the d-scan technique to pulses of arbitrary duration, enabling their complete measurement without prior knowledge of the introduced dispersion. In particular, we show that the pulse compressors already employed in chirped pulse amplification (CPA) systems can be used to simultaneously compress and measure the temporal profile of the output pulses on-target in a simple way, without the need of additional diagnostics or calibrations, while at the same time calibrating the often-unknown differential dispersion of the compressor itself. We demonstrate the technique through simulations and experiments under known conditions. Finally, we apply it to the measurement and compression of 27.5 fs pulses from a CPA laser.
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影响因子：
2.1
作者：
Alonso, Benjamin;Miranda, Miguel;Crespo, Helder
通讯作者：
Crespo, Helder
影响因子：
3.6
作者：
Canhota, Miguel;Silva, Francisco;Crespo, Helder M.
通讯作者：
Crespo, Helder M.
影响因子：
3.8
作者：
Miranda, Miguel;Fordell, Thomas;Crespo, Helder
通讯作者：
Crespo, Helder
影响因子：
3.6
作者：
Sartania, S;Cheng, Z;Ferencz, K
通讯作者：
Ferencz, K
影响因子：
3.8
作者：
Silva, Francisco;Miranda, Miguel;Crespo, Helder
通讯作者：
Crespo, Helder