This work was supported in part by the National Science Foundation and by Tektronix, Inc. The author also expresses his appreciation to members of the Department of Physics at the University of Otago for valuable discussions and hospitality during his sabbatical visit.
Physical Review A
Semiconductor lasers, Optoelectronic devcies -- Mathematical models, Light amplifiers
It has recently been shown that a field-equation time-derivative approximation that is commonly used in studies of laser-oscillator dynamics is not necessary and can lead to significant errors for some lasers. A related space-derivative approximation is widely used in studies of steady-state laser amplifiers. A more rigorous amplifier formalism is developed here, and the results are exact solutions of Maxwell’s equations. The improved model predicts a spatial instability, single mirror oscillation, and other interesting field behavior.
Casperson, L. W. (1991). Field-equation approximations and amplification in high-gain lasers: Numerical results. 44 (5), 3291-3304.