Athermal hybrid laser

Abstract

Dense WDM in the datacentre will be the next frontier for datacentre interconnects. Current silicon based transceivers are based on a single spatial multiplexed Distributed Feedback laser (DFB) and external silicon modulators providing an effective but limited system. So far, wavelength division multiplexing (WDM) has seen a very slow uptake in data-centre interconnects due to issues in maintaining the laser output at a fixed wavelength in an environment in which the ambient temperature varies widely. We will present results on a hybrid laser that uses a silicon nitride based reflector. Silicon nitride has a much lower thermo-optic coefficient than indium phosphide or silicon and consequently the hybrid laser exhibits dramatically reduced sensitivity to temperature fluctuations.

Ganga Chinna Rao Devarapu

Researcher in Nanophotonics

My research interests include silicon photonics, photonic crystals and biomedical devices.