System and Method for Measuring Phase-Matching Spectral Phase Curve by Nonlinear Optical Spectral Interferometry

摘要

A system for measuring a phase-matching spectral phase curve by nonlinear spectral interferometry includes a broadband light source, a first beam splitter, a first nonlinear crystal, a second nonlinear crystal and a spectrometer. The first beam splitter splits the broadband light source into a first light and a second light. The first nonlinear crystal is used for converting the first light into a third light, wherein the third light has a reference phase spectrum. The second nonlinear crystal is used for converting the second light into a fourth light which encoded a phase-matching spectral phase of the second nonlinear to crystal. The spectrometer is used for providing an interferogram from an interference between the third light and the fourth light. Thus, by analyzing the interferogram, the phase-matching spectral phase curve of the second nonlinear crystal can be measured without knowing the spectral phase of the broadband light source.