Monolithic Scalable Mid-Infrared Phase-Locked Laser Array

Period of Performance: 08/27/2013 - 05/31/2014


Phase 2 STTR

Recipient Firm

Intraband LLC
200 N. Prospect Ave. Array
Madison, WI 53726
Principal Investigator
Firm POC

Research Institution

University of Wisconsin, Madison
2100 Main Street
Madison, WI 53706
Institution POC


The technical objectives of this proposal are: 1) Design a metal/semiconductor grating-based (i.e., substrate-emitting) Grating-Coupled Surface-Emitting Distributed Feedback Quantum Cascade Laser (GCSE-DFB QCL) emitting at 4.6 microns with high beam quality; and 2) Demonstrate a GCSE-DFB QCL emitting at 4.6 microns with single-lobe-beam operation and high beam quality, under CW operation. It is the goal of this program to develop a GCSE-DFB QCL single-stripe device which will operate in a single, diffraction-limited lobe (both longitudinally and laterally) under CW operation to moderately high (~ 0.5 W) output powers. Tapered-active, deep-well QC lasers will be used, since they suppress carrier leakage out of active regions, resulting in electro-optic characteristics much less temperature sensitive than for conventional QC devices; thus allowing for significant increases in average power and wallplug efficiency.