Fundamental line broadening of single-mode /GaAl/As diode lasers

The spectral width of (GaAl)As CW single-mode lasers was found to vary linearly with reciprocal output power at 300 K with a slope 50 times greater than that predicted by Schawlow-Townes formula without the partial inversion factor. The laser linewidth was analyzed by a scanning Fabry-Perot confocal...

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Bibliographic Details
Published in:Applied physics letters 1981-04, Vol.38, p.511-513
Main Authors: Fleming, M W, Mooradian, A
Format: Article
Language:English
Online Access:Get full text
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Summary:The spectral width of (GaAl)As CW single-mode lasers was found to vary linearly with reciprocal output power at 300 K with a slope 50 times greater than that predicted by Schawlow-Townes formula without the partial inversion factor. The laser linewidth was analyzed by a scanning Fabry-Perot confocal interferometer. The observed decrease in the linewidth from 300 to 77 K was found to be consistent with predictions for a partially inverted system, but the broadening magnitude could not be attributed completely to partial inversion.
ISSN:0003-6951