Mingjin Gao, Yuhang Li, Fan Zhang, Jiehao Wang, Shuyang He, Huijian Liang, Yumin Zhang, Lianqing Zhu, Xiaoshun Jiang, Qiang Liu
Dispersion plays a great role in ultrafast laser oscillators, ultrashort pulse amplifiers, and many other nonlinear optical dynamics. Therefore, dispersion measurement is crucial for device characterization, system design and nonlinear dynamics investigation therein. In this work, we demonstrate a versatile approach, i.e., Kalman filtering-aided white-light interferometry, for group delay dispersion (GDD) characterization. Extended Kalman filter is adopted to track the cosine-like interferogram, and to eliminate the unintended bias and the envelope, providing a nearly ideal phase retrieval and GDD estimation...
March 25, 2024: Optics Express