Coupled fiber taper extraction of 1.53 um photoluminescence from erbium doped silicon nitride photonic crystal cavities

摘要

Optical fiber tapers are used to collect photoluminescence emission at ~1.5um from photonic crystal cavities fabricated in erbium doped silicon nitride onsilicon. Photoluminescence collection via fiber taper is enhanced 2.5 timesrelative to free space, with a total taper collection efficiency of 53%. Byvarying the fiber taper offset from the cavity, a broad tuning range ofcoupling strength is obtained. This material system combined with fiber tapercollection is promising for building on-chip optical amplifiers.