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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 24 — Nov. 24, 2008
  • pp: 20038–20046

Modeling of transverse mode interaction in large-mode-area fiber amplifiers

N. Andermahr and C. Fallnich  »View Author Affiliations

Optics Express, Vol. 16, Issue 24, pp. 20038-20046 (2008)

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We model the transverse mode interaction in a large-mode-area fiber amplifier by solving the Fresnel wave equation including local gain saturation. In order to calculate the electric field distribution we apply a finite difference beam propagation method, which is followed by the derivation of the modal powers and modal polarization states. A polarization dependent mode amplification is found that is in good agreement with recent experimental results.

© 2008 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(260.5430) Physical optics : Polarization

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 1, 2008
Revised Manuscript: November 13, 2008
Manuscript Accepted: November 14, 2008
Published: November 20, 2008

N. Andermahr and C. Fallnich, "Modeling of transverse mode interaction in large-mode-area fiber amplifiers," Opt. Express 16, 20038-20046 (2008)

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  1. Y. Jeong, J. Nilsson, J. K. Sahu, D. B. Soh, P. Dupriez, C. A. Codemard, S. Baek, D. N. Payne, R. Horley, J. A. Alvarez-Chavez, and P. W. Turner, "Single-mode plane-polarized ytterbium-doped large-core fiber laser with 633-W continuous-wave output power," Opt. Lett. 30, 955-957 (2005). [CrossRef] [PubMed]
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  3. P. Weßels and C. Fallnich, "Highly sensitive beam quality measurements on large-mode-area fiber amplifiers," Opt. Express 11, 3346-3351 (2003).
  4. A. Galvanauskas, M. C. Swan, and C.-H. Liu, "Effectively-single-mode large core passive and active fibers with chirally-coupled-core structures," presented at the Conference on Lasers and Electro-Optics, San Jose, USA, 4-9 May 2008.
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  13. N. Andermahr and C. Fallnich, "Interaction of transverse modes in a single-frequency few-mode fiber amplifier caused by local gain saturation," Opt. Express 16, 8678-8684 (2008). [CrossRef] [PubMed]
  14. T. Bhutta, J. I. Mackenzie, D. P. Shepherd, and R. J. Beach, "Spatial dopant profiles for transverse-mode selection in multimode waveguides," J. Opt. Soc. Am. B 19, 1539-1543 (2002). [CrossRef]
  15. M. Gong, Y. Yuan, C. Li, P. Yan, H. Zhang, and S. Liao, "Numerical modeling of transverse mode competition in strongly pumped multimode fiber lasers and amplifiers," Opt. Express 15, 3236-3246 (2007). [CrossRef] [PubMed]
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