We present a practical diagnostic for quantifying changes to the supercontinuum spectrum of an ultrashort laser pulse undergoing nonlinear propagation. The method allows a connection to be made between a nonlinear physics phenomenon and the specific regions of the angular spectrum that it affects. We apply this method to investigate interference between third-harmonic generation and self-phase modulation.
Publication Source (Journal or Book title)
Journal of the Optical Society of America B: Optical Physics
Brown, J., Couairon, A., Polynkin, P., & Gaarde, M. (2019). Analysis of the angular spectrum for ultrashort laser pulses. Journal of the Optical Society of America B: Optical Physics, 36 (2), A105-A111. https://doi.org/10.1364/JOSAB.36.00A105