Chaos in a solid-state laser with a periodically modulated pump.

A NdP(5)O(14) laser at 1.325-microm wavelength pumped by an Ar(+) laser whose intensity is periodically modulated at a rate comparable with the relaxation-oscillation frequency of the NdP(5)O(14) laser shows a period-doubling sequence, chaotic emission, and windows of regular pulsing within the chaotic region.