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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 9 — May. 2, 2005
  • pp: 3218–3223

Three- and four-level transition dynamics in Yb-fiber laser

Lasse Orsila and Oleg G. Okhotnikov  »View Author Affiliations

Optics Express, Vol. 13, Issue 9, pp. 3218-3223 (2005)

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The behavior of transient oscillations has been studied experimentally for the first time in a broadly tunable ytterbium fiber laser. Spectroscopic study of the relaxation frequency allows one to distinguish three- and four-level transitions and provides a useful tool for controlling the dynamics of pulsed lasers. Particularly, the relaxation oscillation frequency depends on the occupation of the terminal level of the laser transition and clearly shows that the laser transition becomes four-level at the long-wavelength tail of the gain spectrum of ytterbium fiber (λ>1060 nm). The wavelength dependence of relaxation oscillations can be used to determine the parameters of the gain material such as transition cross-section.

© 2005 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(140.3510) Lasers and laser optics : Lasers, fiber
(160.2290) Materials : Fiber materials
(160.3380) Materials : Laser materials
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Research Papers

Original Manuscript: March 18, 2005
Revised Manuscript: April 12, 2005
Published: May 2, 2005

Lasse Orsila and Oleg Okhotnikov, "Three- and four-level transition dynamics in Yb-fiber laser," Opt. Express 13, 3218-3223 (2005)

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