Red VCSEL for Last Mile Networks

Inhalt:
In this paper we discuss the potential and the possible limitations of the AlGaInP material system and its consequences for laser applications in vertical-cavity surface-emitting lasers (VCSEL). Epitaxial and technological solutions were presented to overcome some parts of the inherent problems. Measurements of internal heating of oxide-confined 660 nm AlGaInP-VCSEL are compared with calculated data by a cylindrical heat dissipation model to improve the heat removal out of the device. Pulsed lasing operation of a 660 nm VCSEL at +140deg C heatsink temperature is demonstrated, where we exceeded more than 0.5 mW and at 170deg C more than 0.1 mW output power was achieved. Continuous-wave measurements of our 660 nm devices show laser emission at 65deg C with an optical output power over 0.1 mW and operating times of more than 2000 hours without spontaneous failure.