Efficient High Power 2 micron Tm3+-Doped Fiber Laser

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNL04AB40P
Agency Tracking Number: 034307
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: E1.02
Solicitation Number: N/A
Small Business Information
NP Photonics, Inc.
9030 S. Rita Road, Tucson, AZ, 85747-9102
DUNS: 014750785
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Shibin Jiang
 Principal Investigator
 (520) 799-7407
 jiang@npphotonics.com
Business Contact
 James Fountain
Title: Director Contract Admin.
Phone: (520) 799-7424
Email: fountain@npphotonics.com
Research Institution
N/A
Abstract
This proposal is for the development of new Tm3+ doped germanate glass fibers for efficient high power 2 micron fiber lasers capable of generating an output power of up to hundreds watts. We propose to use Tm3+ doped germanate glass fibers because silica glass fiber is not the ideal host for lasers at wavelength of 2 micron and longer. Germanate glass exhibits lower phonon energy compared to silica glass, increasing the quantum efficiency of 3F4 level of Tm3+ ions. Importantly, Tm3+ can be highly doped into germanate glasses, which results in so called cross-relaxation, dramatically improving the quantum efficiency. We will develop double-clad single mode germanate glass fibers with greater than 6wt% Tm3+ concentration to take full advantages of this Tm3+ cross-relaxation process, developing highly efficient fiber lasers at 2 micron. This type of fiber laser is useful for LIDAR applications, can also be used to pump Ho3+-doped crystals to generate extremely high power 2 micron lasers.

* information listed above is at the time of submission.

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