Mode competition in acousto-optically Q-switched planar waveguide lasers

Jianqiu Xu, H. J. Baker, D. R. Hall

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Multi-mode rate equations have been developed to investigate mode competition in high-power acousto-optically Q-switched planar waveguide lasers. The mode competition arises from coupling effects and temporal losses in the transform between guided modes and free-space propagation. Pulse-to-pulse instability and temporal beam distortions are enlarged by mode competition when the laser works in the multi-mode regime. The influence of parasitic oscillation is also discussed. A Nd:YAG planar waveguide laser has been established with a folded hybrid/unstable resonator. A maximum average power of 83 W with a beam propagation factor Mx2 × My2 = 1.2 × 1.4 is obtained. The theoretical simulation agrees well with the experimental observation. © 2006 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)814-820
Number of pages7
JournalOptics and Laser Technology
Issue number4
Publication statusPublished - Jun 2007


  • Mode competition
  • Planar waveguide laser
  • Q-switching


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