Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatiospectral domains
Characterization of sub-two-cycle pulses from a hollow-core fiber compressor in the spatiotemporal and spatiospectral domains
复制标题
DOI：
10.1007/s00340-013-5406-5
复制
发表时间：
2013-08-01
影响因子：
2.1
通讯作者：
Crespo, Helder
中科院分区：
文献类型：
--
作者：
Alonso, Benjamin;Miranda, Miguel;Crespo, Helder
我们在一根填充了Ar的空芯光纤中得到了后压缩的25fS(傅里叶极限)放大脉冲。使用一对楔形和啁啾反射镜将输出脉冲压缩到4.5fS(傅立叶极限为4.1fS)，这相当于不到两个光周期。然后，我们结合了d-扫描和海星技术，对脉冲进行了表征。脉冲的时间(和频谱)测量是用d-扫描完成的，它被用作通过海星将表征扩展到脉冲的时空(和空间频谱)幅度和相位的参考。中空光纤输出的后压缩脉冲的能量为150微焦耳。对脉冲的分析表明，较大的光谱展宽和蓝移，以及较短的光束中心持续时间。第一次，我们展示了强超宽带脉冲在亚两周状态下的完整特征，这提供了对脉冲性质(空间-时间和空间-频率)的更好的洞察，并且与它们的应用高度相关。
We have post-compressed 25 fs (Fourier limit) amplified pulses in an argon-filled hollow-core fiber. The output pulses were compressed using a pair of wedges and chirped mirrors down to 4.5 fs (Fourier limit of 4.1 fs), which corresponds to less than two optical cycles. We then performed the characterization of the pulses by combining the d-scan and the STARFISH techniques. The temporal (and spectral) measurement of the pulses is done with d-scan, which is used as the reference to extend the characterization to the spatiotemporal (and spatiospectral) amplitude and phase of the pulses by means of STARFISH. The post-compressed pulses at the output of the hollow-fiber had an energy of 150 mu J. The analysis of the pulses revealed larger spectral broadening and blue-shift, and shorter duration at the center of the beam. For the first time, we demonstrate the complete characterization of intense ultra-broadband pulses in the sub-two-cycle regime, which provides an improved insight into the properties (space-time and space-frequency) of the pulses and is highly relevant for their applications.