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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 10 — Apr. 1, 2010
  • pp: 1979–1985

Relaxation oscillation in Er 3 + -doped and Yb 3 + / Er 3 + co-doped fiber grating lasers

Lina Ma, Zhengliang Hu, Xun Liang, Zhou Meng, and Yongming Hu  »View Author Affiliations

Applied Optics, Vol. 49, Issue 10, pp. 1979-1985 (2010)

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Relaxation oscillations in Er 3 + -doped and Yb 3 + / Er 3 + co-doped fiber grating lasers were investigated. Intensity noise models were established for both cases in which the fluctuations of pump power and cavity loss were analyzed. Simulation indicates that the relaxation oscillation is induced by the pump power fluctuation, and fluctuation of the cavity loss can broaden the relaxation oscillation peak and enhance the amplitude. The relaxation oscillation of a laser with Er 3 + -doped fiber exhibits a lower frequency and larger amplitude than that of an Yb 3 + / Er 3 + co-doped fiber grating laser. Distributed Bragg reflector fiber grating lasers with Er 3 + -doped fiber and Yb 3 + / Er 3 + co-doped fiber were fabricated, and the relaxation oscillations were measured. For the former, the relaxation oscillation frequency is at the magnitude of several hundreds of kilohertz and lineally shifts toward the higher frequency with the pump power. For the latter, no obvious relaxation oscillation was measured.

© 2010 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 15, 2009
Revised Manuscript: March 3, 2010
Manuscript Accepted: March 5, 2010
Published: March 30, 2010

Lina Ma, Zhengliang Hu, Xun Liang, Zhou Meng, and Yongming Hu, "Relaxation oscillation in Er3+-doped and Yb3+/Er3+co-doped fiber grating lasers," Appl. Opt. 49, 1979-1985 (2010)

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