Noise investigation of single section InAs/ InP quantum-dash lasers in active and passive mode-locking

摘要

Summary form only given. We investigate the amplitude and phase noise of an optical frequency comb based on InAs/InP Quantum-dash (Qdash) mode-locked laser (MLL). The laser demonstrates low relative intensity noise (RIN) and phase noise in the passive regime. By actively mode-locking the laser, we observe a reduction in the 1/f phase noise and timing jitter, as a result of which the optical linewidth decreases. Owing to such low noise performance, the frequency combs generated by Qdash lasers are particularly suited for data center interconnects using coherent optical communication.