115/spl deg/C, 12.5-Gb/s direct modulation of 1.3-/spl mu/m InGaAlAs-MQW RWG DFB laser with notch-free grating structure for datacom applications

Direct modulation at 12.5 Gb/s of 1.3-/spl mu/m DFB RWG lasers with low-resistance notch-free gratings running at 115/spl deg/C is experimentally demonstrated, for the first time. Moreover, 10-Gb/s modulated transmission over 30 km at 115/spl deg/C was achieved.