Improving the Transient Gain of a QD-SOA by Using Tapered Waveguide Structure

In this paper, the tapered waveguide structure for quantumdot semiconductor optical amplifiers (QD-SOA’s) is introduced andformulated for the first time. It’s observed that by employing thetapered waveguide, gain as the main feature of the device shows more stability as the optical signal passing through the active region. Inaddition, the tapered QD-SOA demonstrates more stability in transient gain as the width ratio of the output to the input increases. This is observed to be a consistent behavior as we gradually increase the width ratio to 10, where the device shows more than 10 times stability incomparison with generic QD-SOA. In this paper, the rate equations are employed for modeling the QD-SOA and its tapered structure, and we use Matlab ODE along with the finite difference method for studying and simulating the device.

کلیدواژه ها:

QD-SOA ، Transient Gain ، Tapered Waveguide