The evolution of the space-charge field under illumination with weak very short pulses is discussed. Under a weak irradiation limit the space-charge field after recombination of the carrier becomes the same regardless of whether it is a cw, a single-pulsed, or a repetitive-pulsed excitation. On irradiation with very short pulses the space-charge field tends to increase and then decrease when the space-charge field is large owing to the nonlinear effect of the recombination term in the rate equation. With this fluctuation being neglected, the evolution of the space-charge field by mode-locked pulses becomes identical to that by cw illumination having the same averaged intensity, which was confirmed experimentally with a crystal and a cw and a picosecond mode-locked Nd:YAG laser.
© 1997 Optical Society of AmericaFull Article | PDF Article
Arthur L. Smirl, K. Bohnert, George C. Valley, Ruth Ann Mullen, and Thomas F. Boggess
J. Opt. Soc. Am. B 6(4) 606-615 (1989)
M. C. Bashaw, T.-P. Ma, R. C. Barker, S. Mroczkowski, and R. R. Dube
J. Opt. Soc. Am. B 7(12) 2329-2338 (1990)
Q. N. Wang, R. M. Brubaker, and D. D. Nolte
J. Opt. Soc. Am. B 11(9) 1773-1779 (1994)