Yield analysis of distributed-feedback metal-clad ridge-waveguide laser diodes for coherent system applications

An above-threshold analysis of the distributed-feedback metal-clad ridge-waveguide laser diode is presented. Calculations are based on a theoretical model which takes into account the cross-sectional MCRW structure and the longitudinal spatial hole burning of the carriers in the DFB structure. The results of the model calculations include statistics of output power and laser linewidth as well as the device yield for system application. For an optimised design with AR/HR facet coating available output power levels of 40 mW and linewidths below 10 MHz for more than 80% and 50% of all devices, respectively, have been estimated