Extremely low threshold (0.56 mA) operation in 1.3µmInGaAsP/InP compressive-strained-MQW lasers

Abstract
A record low threshold current of 0.56 mA, as a long-wavelength laser, has been obtained in a 1.3 µm InGaAsP/InP strained-MQW laser, at room temperature (25°C), by optimising an active layer and by employing a short cavity with high-reflection coatings.