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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 2 — Feb. 1, 2010
  • pp: 179–186

Effects of excited-state absorption on self-pulsing in Tm 3 + -doped fiber lasers

Yulong Tang and Jianqiu Xu  »View Author Affiliations


JOSA B, Vol. 27, Issue 2, pp. 179-186 (2010)
http://dx.doi.org/10.1364/JOSAB.27.000179


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Abstract

Based on theoretical analysis and numerical simulation, the mechanism of self-pulsing operation of 2 - μ m Tm 3 + -doped fiber lasers is explored. A simplified rate-equation model is proposed to analyze stable operation of Tm 3 + -doped fiber lasers. It is shown that the continuous-wave (CW) solution does not exist for certain pump intensities when excited-state absorption (ESA) is included. In numerical simulation, four energy-transfer processes are calculated to identify the origin of self-pulsing in Tm 3 + -doped fiber lasers. The phonon-assisted ESA process H 5 3 H 4 3 is identified as the key factor for self-pulsing in Tm 3 + -doped fiber lasers, which confirms the absence of a CW solution in the theoretical analysis. The numerical simulation gives out a regular pulse train, whose characteristics are in excellent agreement with the experimental results. The impacts of ESA cross section and pump intensity on the self-pulsing characteristics are also investigated.

© 2010 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(140.3540) Lasers and laser optics : Lasers, Q-switched
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 14, 2009
Revised Manuscript: November 11, 2009
Manuscript Accepted: November 13, 2009
Published: January 7, 2010

Citation
Yulong Tang and Jianqiu Xu, "Effects of excited-state absorption on self-pulsing in Tm3+-doped fiber lasers," J. Opt. Soc. Am. B 27, 179-186 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-2-179


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