Parametric amplification of pulses in Bragg gratings is investigated numerically. Gain is observed for a much larger range of parameters than in uniform media. This is explained in terms of grating-assisted phase matching. In contrast to that for cw results, the input signal pulse need not be tuned to a particular frequency. Rather, through cross-phase modulation the signal self-locks to the correct frequency for growth.
© 1996 Optical Society of America
M. J. Steel and C. Martijn de Sterke, "Bragg-assisted parametric amplification of short optical pulses," Opt. Lett. 21, 420-422 (1996)