High-quality 1.3 μm GaInAsP/InP BH-DFB lasers have been demonstrated. The threshold current was 16 mA and the differential quantum efficiency was 25% per facet. A stable single-longitudinal-mode oscillation was obtained, both up to four times the threshold current and up to 85°C. These results are comparable or superior to reported results of Fabry-Perot BH lasers.