Negative linear gain and coupling in Lamb's two-mode laser theory
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.
- Publication:
-
Optics Communications
- Pub Date:
- February 1975
- DOI:
- 10.1016/0030-4018(75)90015-2
- Bibcode:
- 1975OptCo..13...91S
- Keywords:
-
- Coupled Modes;
- Laser Modes;
- Power Gain;
- Stable Oscillations;
- Laser Outputs;
- Multimode Resonators;
- Optical Coupling;
- Singularity (Mathematics);
- Lasers and Masers