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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 11 — Jun. 1, 2010
  • pp: 1828–1830

Near-diffraction-limited operation of step-index large-mode-area fiber lasers via gain filtering

John R. Marciante, Richard G. Roides, Vladimir V. Shkunov, and David A. Rockwell  »View Author Affiliations


Optics Letters, Vol. 35, Issue 11, pp. 1828-1830 (2010)
http://dx.doi.org/10.1364/OL.35.001828


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Abstract

We present, for the first time to our knowledge, an explicit experimental comparison of beam quality in conventional and confined-gain multimode fiber lasers. In the conventional fiber laser, beam quality degrades with increasing output power. In the confined-gain fiber laser, the beam quality is good and does not degrade with output power. Gain filtering of higher-order modes in 28 μm diameter core fiber lasers is demonstrated with a beam quality of M 2 = 1.3 at all pumping levels. Theoretical modeling is shown to agree well with experimentally observed trends.

© 2010 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(140.3510) Lasers and laser optics : Lasers, fiber
(140.5560) Lasers and laser optics : Pumping
(230.7370) Optical devices : Waveguides

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 1, 2010
Revised Manuscript: May 4, 2010
Manuscript Accepted: May 5, 2010
Published: May 24, 2010

Citation
John R. Marciante, Richard G. Roides, Vladimir V. Shkunov, and David A. Rockwell, "Near-diffraction-limited operation of step-index large-mode-area fiber lasers via gain filtering," Opt. Lett. 35, 1828-1830 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-11-1828

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