Self-phase modulation (SPM) in a multikilojoule laser system was detected spectroscopically and correlated with the time derivative of the intensity measured at the output of the system. This correlation provides an empirical relationship that makes it possible to rapidly determine the magnitude of the SPM being generated using measured experimental data. This empirical relationship was verified by modeling the propagation of an optical pulse in the laser amplifier chain to predict both pulse shape and the SPM.
© 2011 Optical Society of America
Original Manuscript: July 9, 2010
Revised Manuscript: November 9, 2010
Manuscript Accepted: November 15, 2010
Published: February 18, 2011
W. R. Donaldson, D. N. Maywar, J. H. Kelly, and R. E. Bahr, "Measurement of the self-phase modulation-induced bandwidth in a 30kJ class laser amplifier chain," J. Opt. Soc. Am. B 28, 445-449 (2011)