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A novel complex-coupled InGaAsP/InP integrated twin guide distributed feedback (ITG-DFB) laser with a substantially simplified fabrication process made by single step epitaxy without corrugation overgrowth is described. Room temperature CW operation with a threshold current of 45 mA and a SMSR in excess of 40 dB is demonstrated.
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Rast et al. (1995) studied this question.
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