Open AccessDesign and comparison of composite rod crystals for power scaling of diode end-pumped Nd:YAG lasers
Author(s) -
René Wilhelm,
Denis Freiburg,
M. Frede,
Dietmar Kracht,
Carsten Fallnich
Publication year - 2009
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.17.008229
Subject(s) - materials science , optics , laser , diode , crystal (programming language) , diode pumped solid state laser , doping , laser diode , laser power scaling , optoelectronics , physics , computer science , programming language
A comparison of composite Nd:YAG laser rod crystals with one, two and three doped segments for high-power diode end-pumping is presented. An approach based on an expansion of the heat generation density and temperature distributions into a Fourier-Bessel basis set for solving the stationary heat conduction equation is used for choosing adequate segment lengths and dopant concentrations. A maximum laser output power of 167.5 W at an optical-to-optical efficiency of 53.6% was achieved by longitudinal pumping a crystal with three doped segments with fibre-coupled laser diodes.