2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/212034We analyze the excess noise in the framework of the conventional quantum theory of laser-like systems. Our calculation is conceptually simple and our result also shows a correction to the semi-classical result derived earlier.4 pages, 0 figures, revtex, this version has minor changes and one additional reference, scheduled for publication SEP99 in PRAQuantum Physicstext