dorsal/arxiv
View SchemaMode Competition in Gas and Semiconductor Lasers
| Authors | Philip F. Bagwell |
|---|---|
| Categories | |
| ArXiv ID | physics/0309045 |
| URL | https://arxiv.org/abs/physics/0309045 |
Abstract
The output spectrum of both gas and semiconductor lasers usually contains more than one frequency. Multimode operation in gas versus semiconductor lasers arises from different physics. In gas lasers, slow equilibration of the electron populations at different energies makes each frequency an independent single-mode laser. The slow electron diffusion in semiconductor lasers, combined with the spatially varying optical intensity patterns of the modes, makes each region of space an independent single-mode laser. We develop a rate equation model for the photon number in each mode which captures all these effects. Plotting the photon number versus pumping rate for the competing modes, in both subthreshold and above threshold operation, illustrates the changes in the laser output spectrum due to either slow equilibration or slow diffusion of electrons.
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"abstract": "The output spectrum of both gas and semiconductor lasers usually contains\nmore than one frequency. Multimode operation in gas versus semiconductor lasers\narises from different physics. In gas lasers, slow equilibration of the\nelectron populations at different energies makes each frequency an independent\nsingle-mode laser. The slow electron diffusion in semiconductor lasers,\ncombined with the spatially varying optical intensity patterns of the modes,\nmakes each region of space an independent single-mode laser. We develop a rate\nequation model for the photon number in each mode which captures all these\neffects. Plotting the photon number versus pumping rate for the competing\nmodes, in both subthreshold and above threshold operation, illustrates the\nchanges in the laser output spectrum due to either slow equilibration or slow\ndiffusion of electrons.",
"arxiv_id": "physics/0309045",
"authors": [
"Philip F. Bagwell"
],
"categories": [
"physics.optics"
],
"title": "Mode Competition in Gas and Semiconductor Lasers",
"url": "https://arxiv.org/abs/physics/0309045"
},
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