Efficient High Power 2 micron Tm3+-Doped Fiber Laser

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,528.00
Award Year:
2005
Program:
SBIR
Phase:
Phase II
Contract:
NNL05AA13C
Award Id:
68913
Agency Tracking Number:
034307
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
9030 S. Rita Road, Tucson, AZ, 85747
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
014750785
Principal Investigator:
ShibinJiang
(520) 799-7407
jiang@npphotonics.com
Business Contact:
JamesFountain
Business Official
(520) 799-7424
fountain@npphotonics.com
Research Institute:
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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