Design and Performance of High-Power 1.5 μm DFB Lasers.

A comprehensive design for high-power DFB lasers is discussed. An anti-reflection/high-reflection facet structure and optimized coupling between forward and backward propagation waves in continuous corrugation-type devices are shown in to be essential for thus purpose. By applying the forementioned optimization to 1.5 µm DFB laser parameters, a maximum output power of 45 mW and a quantum efficiency of 37 percent are obtained at 20°C. The devices oscillate in a single-longitudinal-mode with a side-mode suppression ratio of more than 30 dB under 1 GHz sinusoidal modulation. [ABSTRACT FROM AUTHOR]