Realisation of monolithically integrated single frequency MQW laser and booster amplifier at 1.5 mu m wavelength

The fabrication and performance of a l.5 μm wavelength multiquantum well distributed feedback laser monolithically integrated with a booster amplifier are described. Single longitudinal mode operation was achieved at output powers exceeding 45 mW. A minimum spectral linewidlh of 2.3 MHz was obtained, with powers of 35 mW being reached before linewidth rebroadening occurred.