title: Direct measurement of group delay with joint time-frequency analysis of a white-light spectral interferogram.
abstract: We propose and demonstrate an analysis method to directly extract the group delay rather than the phase from the white-light spectral interferogram. By the joint time-frequency analysis technique, group delay is directly read from the ridge of wavelet transform, and group-delay dispersion is easily obtained by additional differentiation. The technique shows reasonable potential for the characterization of ultra-broadband chirped mirrors.
authors.affiliation: Institute of Quantum Electronics, State Key Laboratory of Advanced Optical Communication System and Networks, School of Electronics Engineering and Computer Science, University of Beijing, Beijing 100871, China. yqdeng@nim.ac.cn
authors.forename: Yuqiang
authors.initials: Y
authors.lastname: Deng
authors.forename: Weijian
authors.initials: W
authors.lastname: Yang
authors.forename: Chun
authors.initials: C
authors.lastname: Zhou
authors.forename: Xi
authors.initials: X
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Tao
authors.forename: Weipeng
authors.initials: W
authors.lastname: Kong
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zhang