Quantum Cascade Laser Tree Arrays with Broad Area Emitters Offer Ultra-High Output Power and Beam Quality

Technology #11558

Key Points

  • Quantum Cascade Laser (QCL) tree array design can deliver ultra-high brightness with on-axis, far-field maximum, and power concentrated in the central lobe
  • Compact size
  • Applications include defense infrared countermeasures

Abstract

The University of Central Florida invention describes a quantum cascade laser (QCL) configuration with broad-area emitters and tapers at the output facet. The configuration potentially offers ultra-high brightness with on-axis, far-field maximum, and most power concentrated in the central lobe. Broad-area quantum cascade lasers are capable of delivering very high CW power. Output beams from several broad-area emitters can be coherently combined into a single very high brightness beam employing the tree array configuration. The tree array devices are projected to have high yield; they can therefore be commercialized for employment in various critical Department of Defense (DOD) infrared applications.