High-Power Broadband Ytterbium-Doped Helical-Core Fiber Superfluorescent Source

Highly efficient operation of a double-clad ytterbium-doped helical-core fiber in a superfluorescent (nonlasing) configuration has been demonstrated. The fiber was cladding-pumped by a diode-stack at 976 nm and yielded 107 W of amplified spontaneous emission from the two ends of the fiber for 168 W...

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Bibliographic Details
Published in:IEEE photonics technology letters 2007-03, Vol.19 (5), p.300-302
Main Authors: Wang, P., Sahu, J.K., Clarkson, W.A.
Format: Article
Language:English
Subjects:
Amplification
Amplified spontaneous emission (ASE)
Beams (radiation)
Broadband
cladding-pumping
Diodes
Emission
Fiber lasers
Fibers
Laser excitation
Optical fiber amplifiers
Optical fibers
Power amplifiers
Power generation
Pumps
rare-earth-doped optical fibers
Spontaneous emission
superfluorescence
Thermal loading
Thermal management
Wavelengths
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Summary:Highly efficient operation of a double-clad ytterbium-doped helical-core fiber in a superfluorescent (nonlasing) configuration has been demonstrated. The fiber was cladding-pumped by a diode-stack at 976 nm and yielded 107 W of amplified spontaneous emission from the two ends of the fiber for 168 W of absorbed pump power in an output beam with a beam propagation factor (M 2 ) of 2.8. At pump powers over 40 W, the slope efficiency with respect to the absorbed pump power was 76%. The emission spectrum spanned the wavelength range from 1030 to 1160 nm and the bandwidth (full-width at half-maximum) was 37 nm
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2007.891244