Smaller output beam divergence in the slowly opened Q-switch operation

Junewen Chen*, Jun Ting Lin, Yang-Mang Ou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The mechanism of the slowly opened Q-switch operation was investigated thoroughly. Maximum energy extraction from the resonator could be optimized, and the smallest output beam divergence could be achieved. In this article, we present a detailed analysis that has numerically verified the mode-selection mechanism in the slowly opened Q-switch operation, and the degree of the smaller output laser beam divergence that has been achieved. The mechanism of the slowly opened Q-switch operation is the inherent advantage of the passive saturable absorber in this operation. We can use the maximum energy extraction and the smallest output beam divergence results of the slowly opened Q-switch operation to design and optimize various passive saturable absorbers: plastic dye sheets, LiF:F2 - color center crystals, Cr4 +: YAG crystals, RG1000 color glass filters, and the single crystal semiconductor saturable absorber wafers that are in developed in our microchip laser systems.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalOptical Review
Volume13
Issue number2
DOIs
StatePublished - 1 Mar 2006

Keywords

  • Beam divergence
  • Fast opened switch
  • Pockels' cell
  • Porro resonator
  • Q-switched modulation
  • Slowly opened switch

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