Title :
High-Power Broadband Ytterbium-Doped Helical-Core Fiber Superfluorescent Source
Author :
Wang, P. ; Sahu, J.K. ; Clarkson, W.A.
Author_Institution :
Optoelectronics Res. Centre, Southampton Univ.
fDate :
3/1/2007 12:00:00 AM
Abstract :
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
Keywords :
light sources; optical fibre cladding; optical pumping; superradiance; ytterbium; 1030 to 1160 nm; 107 W; 168 W; 976 nm; amplified spontaneous emission; beam propagation factor; broadband source; cladding pump; diode stack; double-clad fiber; emission spectrum; helical-core fiber source; high-power fiber source; superfluorescent source; ytterbium-doped fiber source; Diodes; Fiber lasers; Laser excitation; Optical fiber amplifiers; Optical fibers; Power amplifiers; Power generation; Spontaneous emission; Thermal loading; Thermal management; Amplified spontaneous emission (ASE); cladding-pumping; rare-earth-doped optical fibers; superfluorescence;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.891244
