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Stability of the modelocking regime in quantum dot laser

This paper theoretically and experimentally studies the stability of the modelocking regime in quantum dot lasers. Experimental investigations are carried out with a 40 GHz QD-ML module, having a standard single mode fiber pigtail and a microwave port. The active zone of the device contains 15 layers of self-organized InAs quantum dots embedded in InGaAs quantum wells. Observations show a small region of modulated mode-locking at low gain currents apparent in quantum well devices.