Abstract: The design of asymmetric 980 nm InGaAs/InGaAsP broad-waveguide diode lasers with current blocking layer was designed for high-power, which prevents carrier leakage and increases electro-optical conversion efficiency. The properties of the 980 nm asymmetric waveguide quantum well structure lasers were numerically studied with a commercial LASTIP simulation program. Compared to symmetric structure, the lasers with asymmetric waveguide have a smaller band offset between waveguide and QW. The simulation results show that the asymmetric waveguide has a lower threshold current and higher slope efficiency, lower series resistance than symmetric waveguide the structure, so laser performance of asymmetric 980 nm InGaAs/InGaAsP broad-waveguide diode lasers with current blocking layer has higher electro-optical conversion efficiency and laser output power.