The effect of noise on the accuracy of single-mode rate equations in predic
ting laser diode (LD) behavior is evaluated. Inclusion of noise increases t
he relaxation oscillation damping. Nonlinear dynamics analysis reveals that
noise has disguised an important factor that governs the agreement between
calculated and measured results. Instead, simulations show that the LD act
ive layer temperature has a major impact on the accuracy of modeling LD beh
avior. (C) 2000 American Institute of Physics. [S0003-6951(00)00748-8].