High Efficiency Slab-coupled Optical Waveguide Laser and Amplifier

Technology #13911

Questions about this technology? Ask a Technology Manager

Download Printable PDF

Image Gallery
FIG. 1 is a schematic diagram illustrating a slab-coupled optical waveguide laser (SCOWL) formed in accordance of the invention;FIGS. 2A-2F are schematic diagrams illustrating the process flow for the fabrication of the SCOWL of FIG. 1;FIGS. 2A-2F are schematic diagrams illustrating the process flow for the fabrication of the SCOWL of FIG. 1;FIGS. 2A-2F are schematic diagrams illustrating the process flow for the fabrication of the SCOWL of FIG. 1;FIG. 3 is a graph illustrating measured power versus current, voltage versus current, and power conversion efficiency (PCE) versus current of a 1050 nm SCOWL formed in accordance with the invention;
Categories
Inventors
Joseph Donnelly
Lincoln Laboratory, MIT
Robin Huang
Lincoln Laboratory, MIT
Reuel Swint
Lincoln Laboratory, MIT
Managed By
Jack Turner
MIT Technology Licensing Officer
Patent Protection

High efficiency slab-coupled optical waveguide laser and amplifier

US Patent 8,571,080

A highly efficient slab-coupled optical waveguide laser which includes an upper and lower waveguide region for guiding laser mode.

Applications

This technology is applicable to optical waveguide lasers and amplifiers which are used for materials processing, laser pumping, medical applications and direct direct energy applications.

Problem Addressed

Current slab-coupled optical waveguide lasers are inefficient. This inefficiency is due to etching within the quantum well active region which removes the possibility of lateral current spreading. This etching introduces defects that limit device reliability and operating time.

Technology

High Efficiency Slab Coupled Optical Waveguide Laser and Amplifiers features an improved design where the active region is placed within the interior region of the SCOWL waveguide, instead of at the edges. This allows for etching into the SCOWL waveguide that is required for defining a ridge waveguide. The required etch depth for the SCOWL operation in this improved design is selected such that the active region is unetched and therefore higher efficiency is achieved. This invention is a substantial improvement over previous SCOWL devices and also many other types of single-mode semiconductor lasers.

Advantages

  • Higher efficiency than current technologies
  • More reliable than current technologies
  • ¬†Increased power output
  • ¬† Implementable with different material systems(already implemented in the InGaAs/AlGaAs/GaAs material system)