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Stability criteria of a tapered InAs/InGaAs quantum dot laser based on pulse amplitude jitter and timing jitter investigations

Potential photonic imaging and time-critical applications based on passively mode-locked semiconductor lasers require a precise knowledge of instabilities of these ultra-short pulse sources. These instabilities mainly manifest in a decreased timing jitter and amplitude jitter of the generated optical pulse train. Their origins are a net gain window outside the optical pulse or an imbalance of gain and absorption. We quantify these instabilities by the analysis of the radio-frequency spectrum yielding the amplitude and timing jitter. Thus we can experimentally identify different mode-locking operation regimes.