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

E. H. Bernhardi | Zendy; Andrew Forbes | Zendy; C. Bollig | Zendy; M. J. Daniel Esser | Zendy

Open Access

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

Author(s) -

E. H. Bernhardi,

Andrew Forbes,

C. Bollig,

M. J. Daniel Esser

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.011115

Subject(s) - rod , materials science , optics , laser , continuous wave , diode , thermal , optical pumping , power (physics) , duty cycle , mechanics , optoelectronics , thermodynamics , physics , medicine , alternative medicine , pathology

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.

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