Intensity Noise of Gain-Switched Quantum Dot Laser Based on Multi-Population Rate Equations

The gain-switching properties of an InAs-InP (113)B quantum dot laser based on multi-population rate equations are examined theoretically in detail to generate shorter pulses with the application of a Gaussian pulse beam to the laser excited state. The rate equations are solved by the Runge-Kutta method. The results showed that RIN of gain-switched quantum dot laser is reduced by application of Gaussian pulse beam to the laser excited state. It is also found that pulses with a width of around 28 ps with a high peak power are generated even in presence of noise.