Femtosecond Timing Jitter of Quantum Dot Semiconductor Comb Lasers with Self-Injection Feedback Locking

An analysis of phase noise and timing jitter in an external cavity self-injection feedback locking (ECSIFL) 25 GHz InAs/InP quantum dot coherent comb laser (CCL) is presented. Femtosecond timing jitter of the CCL with ECSIFL is experimentally demonstrated.