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Optical Cooling of RF systems

Award Information

Department of Defense
Award ID:
Program Year/Program:
2011 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
NP Photonics, Inc.
UA Science and Technology Park 9030 S. Rita Road, Suite #120 Tucson, AZ -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2011
Title: Optical Cooling of RF systems
Agency / Branch: DOD / NAVY
Contract: N00014-11-C-0477
Award Amount: $742,821.00


This Phase II Proposal is for the development of an all-fiber based approach to optical cooling for RF systems: a high power, high efficiency Tm+3-doped fiber laser (Lambda from 1.9 microns to ~ 2 microns) is used to pump Tm+3-doped glass fibers, which provide the cooling action on the affixed heat source. One of the main advantages of this approach is that the waste (heat) photons can in principle be piped substantial distances and expelled wherever the system designer wishes. The cooling fibers for Phase II have much less impurities and background losses compared to the glasses used in Phase I. These features of the new glasses will greatly reduce the parasitic heat in the cooling fiber. Fiber structures with multiple cores will be designed and fabricated to increase significantly both pump absorption and net cooling power. The broad wavelength operation of Tm-doped fiber lasers will be utilized for optimization of cooling processes such as pump wavelength dependence. Tm-doped fiber lasers with different lasing wavelengths will be built for that purpose. Optimization of losses in the system, in particular the scattering loss in the fiber system, will be investigated both experimentally and theoretically. Furthermore, multiple fibers/lasers will also be investigated to achieve maximum cooling power and cooling efficiency in the system.

Principal Investigator:

Dan Nguyen
Optical Modeling Engineer
(520) 799-7419

Business Contact:

James Fountain
Director, Contract Admini
(520) 799-7424
Small Business Information at Submission:

NP Photonics, Inc.
UA Science and Technology Park 9030 S. Rita Road, Suite #120 Tucson, AZ -

EIN/Tax ID: 860999108
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Arizona
Sponsored Projects Services
PO Box 3520
Tucson, AZ 85722-3520
Contact: Sherry L. Esham
Contact Phone: (520) 626-6000