Negative linear gain and coupling in Lamb's two-mode laser theory |
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Authors: | E. Stijns |
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Affiliation: | Fakulteit Toegepaste Wetenschappen, Vrije Universiteit, Brussels, Belgium |
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Abstract: | In laser theory one always supposes that the linear gain α of a mode should be positive for that mode to oscillate. We show here that, according to Lamb's theory, this assumption is not necessarry: in a two-mode laser, a mode with a negative linear gain can be brought to oscillation by a negative coupling with another mode. |
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