Estimation of thermal fracture limits in quasi continuous-wave end-pumped lasers through a time-dependent analytical model

E. H. Bernhardi, A. Forbes, C. Bollig, Daniel Esser

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26 Citations (Scopus)

Abstract

A time-dependent analytical thermal model of the temperature and the corresponding induced thermal stresses on the pump face of quasi continuous wave (qcw) end-pumped laser rods is derived. We apply the model to qcw diode-end-pumped rods and show the maximum peak pump power that can be utilized without fracturing the rod. To illustrate an application of the model, it is applied to a qcw pumped Tm: YLF rod and found to be in very good agreement with published experimental results. The results indicate new criteria to avoid fracture when operating Tm: YLF rods at low qcw pump duty cycles.(C) 2008 Optical Society of America.

Original languageEnglish
Pages (from-to)11115-11123
Number of pages9
JournalOptics Express
Volume16
Issue number15
DOIs
Publication statusPublished - 21 Jul 2008

Keywords

  • HEAT-GENERATION
  • ND-YLF
  • YB-YAG
  • RODS
  • TEMPERATURE

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