Mechanism for high singlemode stability of gain-coupled DFB laserswith periodically etched quantum wells |
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Authors: | Makino T. |
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Affiliation: | Bell-Northern Res., Ottawa, Ont.; |
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Abstract: | The sidemode suppression ratio of gain-coupled DFB lasers with periodically etched quantum wells is analysed by a more accurate model for amplified spontaneous emission. It is shown that the periodic etching of quantum wells is very effective for providing a high side-mode suppression. The mechanism for the high singlemode stability is explained by the effective modal gain. which has an enhancement at the longer wavelength side of the Bragg stopband |
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