Room-temperature CW operation of 1.3 μm distributed-feedback GaInAsP/InP lasers

Abstract
Distributed-feedback GaInAsP/InP lasers with a low threshold current emitting at 1.3 μm have been successfully fabricated. A minimum CW threshold current of 66 mA was obtained at room temperature. The temperature coefficient of lasing wavelength was 1 Å/°C, which is about a fifth of that for Fabry-Perot lasers. A stable single longitudinal mode was obtained up to 52°C in a p-side-up configuration.