Surface-Emitting, Monolithic Beam-Combined Mid-Wave IR Quantum Cascade Lasers

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-13-C-0341
Agency Tracking Number: N13A-006-0040
Amount: $79,829.00
Phase: Phase I
Program: STTR
Awards Year: 2013
Solicitation Year: 2013
Solicitation Topic Code: N13A-T006
Solicitation Number: 2013.A
Small Business Information
200 N. Prospect Ave., Madison, WI, -
DUNS: 829814925
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dan Botez
 (608) 265-4643
Business Contact
 Robert Marsland
Title: President
Phone: (608) 216-6920
Research Institution
 University of Wisconsin-Madison
 Kim Moreland
 21 N. Park St
Suite 6401
Madison, WI, 53715-1218
 (608) 262-3822
 Nonprofit college or university
The technical objectives of this proposal are: (1) design a grating-coupled surface-emitting (GCSE) active-photonic-crystal (APC) 4.6 micron-emitting quantum-cascade laser (QCL) to deliver 15 W diffraction-limited CW power in the main lobe of the far-field beam pattern; (2) design a GCSE-APC QCL structure with monolithic aperture-filling optical elements for obtaining close to 90 % of the surface-emitted power into the main lobe of the far-field beam pattern; and (3) design a GCSE-APC QCL structure employing second-order gratings with chirped period for increasing the light-outcoupling efficiency and the device wallplug efficiency. Step-taper-active (STA) QCLs will be used in the design since they suppress carrier leakage out of the QCL active regions, resulting in electro-optic characteristics much less temperature sensitive than for conventional QCLs; thus, allowing for significant increases in CW power and wallplug efficiency. The design will be for APC devices of built-in index step an order of magnitude higher than for conventional APC-QCL as to achieve stable-beam operation in CW operation to high coherent powers with high wallplug efficiency. For 4.6 micron-emitting devices the design will be for usable CW powers as high as 20 W, delivered in diffraction-limited beams.

* Information listed above is at the time of submission. *

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