Repetition-Rate Multiplication of Mode-Locked Lasers Using Harmonic Injection Locking and Gain-Saturated SOA

Low-noise repetition-rate multiplication method is proposed by combining harmonic injection locking and gain-saturated SOA. A 1-GHz optical pulse train with 33-dB side-mode-suppression-ratio, 3% modulation depth, and 6.3-fs absolute rms timing jitter [10kHz-1MHz]is demonstrated. © 2019 The Author(s)