Very Large-Mode Slab-Coupled Optical Waveguide Laser and Amplifier

In the field of optoelectronics, precision, consistency, and control are critical. There is a growing need for improved devices capable of controlling laser mode and preventing mode collapse. This need is particularly imperative in applications that mandate large bandwidth and high-speed data transfer. The traditional approaches have inherent limitations. A common setback is carrier leakage from the active region that can impede the effective functionality of the device. Also, there is a persistent obstacle in establishing precise control over the laser mode within existing setups. These setbacks necessitate an efficient solution that can address both complications simultaneously yet ensure high-performance operation.

Technology Description

The very large mode (VLM) slab-coupled optical waveguide laser (SCOWL) includes a layered design with upper and lower waveguide regions and an active region nestled in between. These waveguide regions guide the laser mode. The lower guide region is found underneath the upper one, and the active region is set up to allow etching into the VLM SCOWL. The etching forms one or more ridge structures while leaving the active region untouched. The unique aspect of this technology is the inclusion of one or more mode control barrier layers. These layers are tactfully positioned between the upper and lower waveguide regions. Their significant function is controlling the fundamental mode profile and, importantly, preventing mode collapse. They serve as an obstacle for carrier leakage from the active region, making them crucial for effective VLM SCOWL operation.