Tunable optical group delay in quantum dot vertical-cavity surface-emitting laser at 10 GHz

Abstract

This investigation experimentally demonstrates tunable optical group delay in a 1.3 µm quantum dot vertical-cavity surface-emitting laser (QD VCSEL). The QD VCSEL is fabricated on a GaAs substrate. Tunable delays are achieved by varying the bias currents, and the maximum delay of 42 ps at 10 GHz has been demonstrated at room temperature.