Li Derong, Zeng Shaoqun, Luo Qingming, Bowlan Pamela, Chauhan Vikrant, Trebino Rick
Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science & Technology, Wuhan, China.
Opt Lett. 2009 Apr 1;34(7):962-4. doi: 10.1364/ol.34.000962.
The chirp acquired by a Gaussian ultrashort pulse due to angular dispersion, unlike that of plane waves, increases nonlinearly with propagation distance and eventually asymptotes to a constant. However, this interesting result has never been directly measured. In this Letter, we use two-dimensional spectral interferometry to measure the propagation dependence of the chirp for Gaussian ultrashort pulses and beams with angular dispersion. The measured chirp as a function of propagation distance agreed well with theory. This work verifies both an equation and a measurement technique that will be useful for predicting or determining the pulse's chirp in ultrafast optics experiments that contain angular dispersion.
由于角色散，高斯超短脉冲所获得的啁啾与平面波不同，它随传播距离非线性增加，并最终渐近于一个常数。然而，这一有趣的结果从未被直接测量过。在本信函中，我们使用二维光谱干涉测量法来测量具有角色散的高斯超短脉冲和光束的啁啾随传播的变化关系。所测得的啁啾作为传播距离的函数与理论结果吻合良好。这项工作验证了一个方程和一种测量技术，它们将有助于预测或确定包含角色散的超快光学实验中脉冲的啁啾。
