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

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$79,829.00
Award Year:
2013
Program:
STTR
Phase:
Phase I
Contract:
N68335-13-C-0341
Agency Tracking Number:
N13A-006-0040
Solicitation Year:
2013
Solicitation Topic Code:
N13A-T006
Solicitation Number:
2013.A
Small Business Information
Intraband LLC
200 N. Prospect Ave., Madison, WI, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
829814925
Principal Investigator:
Dan Botez
Professor
(608) 265-4643
dbotez@charter.net
Business Contact:
Robert Marsland
President
(608) 216-6920
rmarsland@tds.net
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
Abstract
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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