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

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3 Author(s)
Wang, P. ; Optoelectronics Res. Centre, Southampton Univ. ; Sahu, J.K. ; Clarkson, W.A.

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 (M2) 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

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 5 )

Date of Publication:

March1, 2007

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