Fabrication approach for antiphase narrow linewidth complex coupled 1.55 /spl mu/m DFB lasers |
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| Authors: | Schreiner R Wiedmann J Coenning W Porsche J Gentner JL Berroth M Scholz F Schweizer H |
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| Affiliation: | Phys. Inst., Stuttgart Univ., Germany; |
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| Abstract: | A new method for fabricating narrow linewidth antiphase complex coupled MQW DFB lasers by periodically etching the active layer and quarternary InGaAsP overgrowth is reported. The minimum linewidth for a 375 /spl mu/m long ridge waveguide laser is only 250 kHz at an optical output power of 4 mW. |
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