Numerical Simulation and Analysis of Optically Pumped Micro Disk Lasers for Photonic Integrated Circuits

An optically pumped micro disk laser operating at 1.2μm under three waveguide coupling schemes, were numerically simulated. The numerical analysis is done to characterize the device for photonic integrated circuit-based applications. The rate equations were solved under steady state and transient analysis to evaluate the output power characteristics. A turn-on delay of 0.184 ns is observed, as the device is switched from 0 to 1.5 times the threshold input pump power (Pth) and it decreases to 0.041 ns when switched to 5P th , for all the three coupling schemes. However, the rise time settles at a constant value of 0.0235 ns for the coupling schemes. Maximum modulation bandwidth of 9.5GHz is obtained for the coupling scheme employing optimal spiral waveguide and a slot waveguide, with efficiency of 67%, while it increases to 10.5 GHz for the coupling scheme employing optimized spiral waveguide alone, with efficiency of 88%.