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

An optically pumped micro disk laser operating at
$1.2\mu\mathrm{m}$
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%.