Passive Q-switches for Nd:hosted solid state lasers

Junewen Chen, Hong Chang Kung, Hon Fai Yau, Hai Pei Liu, Tzu Chiang Chen, Chao Chia Cheng

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The currently available Nd:hosted lasers utilizing passive Q-switches: a plastic dye sheet, a LiF:F2-color center crystal, a Cr4+:YAG crystal or a RG1000 colored glass filter have been investigated in detail and the results summarized for comparison purposes for the first time. We first briefly summarize our own and others' past studies, and report on recent new results concerning the use of Cr4+:YAG crystals and RG1000 colored glass filters as Nd:hosted laser passive Q-switchings. We then investigate in detail solid state laser system design using the above four passive modulators. Typical interpretations are given based on characteristic features of the materials, such as their saturation intensity and relaxation times. The results are then explained via adequate equations derived with respect to the relevant physical parameters of the materials. The optical density selection of plastic dye sheet passive Q-switch ng for the Nd:YAG laser system design is verified quantitatively, and the slope efficiencies from plastic dye sheet passive Q-switched operation by single pulse and multiple pulse bursts are investigated. The multi-peak Q-switched pulse timing phenomena are presented as well. The outstanding annealability, long lifetime, inexpensiveness and high repetition rate operation of LiF:F2-crystals are highly recommended.

Original languageEnglish
Pages (from-to)511-519
Number of pages9
JournalOptical Review
Issue number6
StatePublished - 2000


  • Cr:YAG crystal
  • LiF:F-color center crystal
  • Nd:Glass laser
  • Nd:YAG laser
  • Nd:YVO laser
  • Plastic dye sheet
  • Q-switching
  • RG1000 colored glass filter


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