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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 19 — Sep. 14, 2009
  • pp: 16980–16993

Multi-pulse oscillation and instabilities in microchip self-Q-switched transverse-mode laser

Jun Dong, Ken-ichi Ueda, and Peizhi Yang  »View Author Affiliations

Optics Express, Vol. 17, Issue 19, pp. 16980-16993 (2009)

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Multi-transverse-mode competition, coupling induced instabilities and multi-pulse or satellite pulse oscillations were investigated experimentally and theoretically in laser-diode-pumped Cr,Nd:YAG self-Q-switched microchip lasers under large pump beam diameter. The different transverse modes have great effects on the laser pulse temporal characteristics such as pulse profile, pulse width, instability of peak power and repetition rate jitter. Multi-transverse-mode, multi-pulse oscillation and periodical pulsation were observed by varying the pump beam diameter. The effect of transverse modes on the instability and multi-pulse oscillation were studied by modified coupled rate equations by taking into account the transverse-mode competition of inversion population under different pump conditions. The numerically simulated results are in good agreement with the experimental results. These results show that the multi-pulse oscillation and instability in the pulse train were attributed to different transverse mode coupling and competition. The peak power instabilities and pulse repetition rate jitter of the laser pulses due to transverse mode coupling were also investigated.

© 2009 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3540) Lasers and laser optics : Lasers, Q-switched
(190.3100) Nonlinear optics : Instabilities and chaos

ToC Category:
Lasers and Laser Optics

Original Manuscript: June 3, 2009
Revised Manuscript: July 12, 2009
Manuscript Accepted: August 20, 2009
Published: September 9, 2009

Jun Dong, Ken-ichi Ueda, and Peizhi Yang, "Multi-pulse oscillation and instabilities in microchip self-Q-switched transverse-mode laser," Opt. Express 17, 16980-16993 (2009)

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