The modulation response, relative intensity noise (RIN) and frequency noise (FN) characteristics of quantum dot (QD) lasers are investigated theoretically in the presence of an external optical beam. Using small signal analysis of the rate equations for carriers and photons, it is demonstrated that by injecting excess carriers into the QDs excited state through optical pumping, the modulation r...

Various types of photonic applications, such as sensing and communication, require the generation wideband optical frequency-modulated (FM) signals. However, generating a FM signal beyond electrical bandwidth limitation modulators is difficult. Here, we propose method to increase bandwidths signals by using cascaded four-wave-mixing (FWM) process show its potential in two applications. We first...