Design optimization of high performance single-mode fabry-perot lasers based on quantum dot materials

The interplay of inhomogeneous and homogeneous broadening of InGaAs/GaAs quantum-dot (QD) Fabry-Perot laser is discussed by a comprehensive rate-equation model. It is found that for a given inhomogeneous broadening, there is always an optimum homogeneous broadening which leads to a narrowest output power spectrum. With the optimum values, the single longitudinal-mode laser is designed. For a cavity length of 200μm, a SMSR (side-mode suppression …