doi.org/10.1364/JOSAB.7.002150
J. Opt. Soc. Am. B
Ultrafast Spectroscopy

Planken, P., Bakker, H., Kuipers, K., & Lagendijk, A. (1990). Frequency chirp in optical parametric amplification with large phase mismatch in noncentrosymmetric crystals. J. Opt. Soc. Am. B, 7, 2150–2154. doi:10.1364/JOSAB.7.002150