Document Detail

End-pumped Nd:YAG laser with a longitudinal hyperbolic dopant concentration profile.
MedLine Citation:
PMID:  19030096     Owner:  NLM     Status:  PubMed-not-MEDLINE    
An approach for scaling end-pumped rod lasers to high output powers by employing a crystal with a continuously varying, nearly hyperbolic dopant concentration profile, resulting in a homogenization of the longitudinal temperature distribution, is presented. The crystal is characterized by determining its dopant concentration profile with an absorption measurement. The fluorescence upon spectrally narrow excitation is recorded, indicating the role of quenching of the upper laser level at high dopant concentration. The on-axis temperature distribution is calculated by employing a Fourier-Bessel approach for solving the stationary heat conduction equation, taking the temperature dependence of the heat conductivity and the dependence of the heat fraction on the dopant concentration into account. Experimentally, a maximum output power of 187 W at an optical-to-optical efficiency of 53 % has been demonstrated.
Ralf Wilhelm; Denis Freiburg; Maik Frede; Dietmar Kracht
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Optics express     Volume:  16     ISSN:  1094-4087     ISO Abbreviation:  Opt Express     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-25     Completed Date:  2009-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137103     Medline TA:  Opt Express     Country:  United States    
Other Details:
Languages:  eng     Pagination:  20106-16     Citation Subset:  -    
Laser Zentrum Hannover e. V., Hollerithallee 8, D-30419 Hannover, Germany.
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