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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 4 — Apr. 1, 2006
  • pp: 652–662

Theory of Q switching in actively mode-locked lasers

Joshua L. Proctor and J. Nathan Kutz  »View Author Affiliations


JOSA B, Vol. 23, Issue 4, pp. 652-662 (2006)
http://dx.doi.org/10.1364/JOSAB.23.000652


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Abstract

An analytic theory is proposed that characterizes Q switching in an active mode-locked cavity as the nonlinear interaction of two unstable modes: one symmetric, another antisymmetric. The phase difference between these modes generates a nonlinear beating interaction that gives rise to quasi-periodic behavior in the laser cavity. This quasi-periodic behavior is responsible for the Q-switching phenomenon and is controlled by the interaction and overlap between neighboring pulses. With a linear stability analysis, a simple qualitative description of the Q-switching phenomenon is given that is verified with numerical simulations of the governing active mode-locked equations. This model characterizes the Q switching as a function of the physical parameters of the laser cavity and elucidates the mechanisms for controlling its behavior.

© 2006 Optical Society of America

OCIS Codes
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.4050) Lasers and laser optics : Mode-locked lasers
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 17, 2005
Revised Manuscript: July 29, 2005
Manuscript Accepted: October 6, 2005

Citation
Joshua L. Proctor and J. Nathan Kutz, "Theory of Q switching in actively mode-locked lasers," J. Opt. Soc. Am. B 23, 652-662 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-4-652

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