Self-pulsating VCSEL with controllable quantum-well saturable absorber

We experimentally demonstrate the first self-pulsating VCSEL with a controllable quantum-well saturable absorber. Self-pulsation frequencies as high as 2 GHz were obtained. Self-pulsating lasers have proven extremely useful in applications where elimination of optical feedback and high-speed driving circuitry is needed. In this work, we present the first demonstrated InGaAs DBR QW VCSEL with self-pulsations occurring through a voltage-controlled saturable absorber.