Distributed loss method to suppress high order modes in broad area quantum cascade lasers
Abstract
We describe a method where the standard fabrication of broad area quantum cascade lasers is modified to provide a controlled amount of direct contact of device sidewalls with metal. We demonstrate that this provides sufficient levels of distributed losses to suppress the high order transverse modes in favor of the fundamental or near-fundamental transverse mode operation. We observe that the quantum cascade laser power and slope efficiency are degraded by a small amount, resulting in a large increase in brightness to accompany the power scaling.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 13, 2017
- Source ID
- 10.1063/1.5006042
Entities
People
- Changyi Yang
- Chunsong Lu
- R. Kaspi
- S. Luong
- T. C. Newell
- Timothy Bate
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory