Two different techniques for modeling the effects of diffraction in a homogeneously broadened, single-longitudinal mode laser are intercompared. Under comparable model conditions, the authors discuss similarities in the field profile and dynamics; however, in the region of small transverse mode spacing where mode-mode competition is relevant, the two models diverge. Both models display regular and irregular pulsing, and hysteresis when the cavity frequency is resonant with the atomic frequency.
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