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Optics Letters

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  • Editor: Anthony J. Campilo
  • Vol. 32, Iss. 17 — Sep. 1, 2007
  • pp: 2605–2607

High-power, single-mode, linearly polarized, ytterbium-doped fiber superfluorescent source

P. Wang and W. A. Clarkson  »View Author Affiliations


Optics Letters, Vol. 32, Issue 17, pp. 2605-2607 (2007)
http://dx.doi.org/10.1364/OL.32.002605


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Abstract

High-power operation of a single-mode, linearly polarized, broadband superfluorescent fiber source has been achieved by using a two-stage cladding-pumped fiber configuration comprising a low power, single-ended, ytterbium-doped superfluorescent fiber seed source and a high-power cladding-pumped, polarization-maintaining, large-mode-area, ytterbium-doped amplifier pumped by a high-power diode source at 976 nm . The source yielded a maximum linearly polarized output of 106 W with a slope efficiency of up to 67% with respect to the launched pump power and with a measured polarization extinction ratio of 13.5 dB . The wavelength spectrum of the superfluorescent source spanned the range continuously from 1035 to 1100 nm , and the bandwidth (FWHM) of the emission spectrum was 21 nm . The minimum seed power required for an output power over 100 W was only 10 mW , corresponding to an effective power gain in the amplifier stage of 40 dB . Single-spatial-mode operation with a beam propagation factor ( M 2 ) < 1.1 was achieved by bending the amplifier fiber to a bend radius of 8 cm , without a significant reduction in output power.

© 2007 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.6630) Lasers and laser optics : Superradiance, superfluorescence

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 4, 2007
Manuscript Accepted: June 28, 2007
Published: August 27, 2007

Citation
P. Wang and W. A. Clarkson, "High-power, single-mode, linearly polarized, ytterbium-doped fiber superfluorescent source," Opt. Lett. 32, 2605-2607 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-17-2605


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References

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