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Small, Efficient and Fast Vertical-Cavity Surface-Emitting Lasers

A Vertical-Cavity Surface-Emitting Laser (VCSEL) applicable to optoelectronics, specifically optical interconnects

Background

Oxide apertures within the Vertical-Cavity Surface-Emitting Laser (VCSEL) have been used to minimize power dissipation by constricting current within the lasing modes and guiding laser modes (thereby increasing overlap between carriers and optical modes and reducing sidewall losses). However, these apertures have produced undesirable optical scattering due to their imperfect shape and a larger mode diameter is needed for low optical loss.

Technology Overview

Researchers at UC Santa Barbara have designed a Vertical-Cavity Surface-Emitting Laser (VCSEL) applicable to optoelectronics, specifically optical interconnects. The invention uses a thicker oxide aperture with a tapered tip designed to reduce the mode volume with minimal added loss. The parasitics are further reduced by using deep oxidation layers. With these novel features, small-dimension high-efficiency

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