High-power Er:YAG laser with quasi-top-hat output beam.
Opt Lett
; 37(9): 1463-5, 2012 May 01.
Article
em En
| MEDLINE
| ID: mdl-22555705
ABSTRACT
A simple method for simultaneously exciting the fundamental (TEM00) transverse mode and first order Laguerre-Gaussian (LG01) donut mode in an end-pumped solid-state laser to yield a quasi-top-hat output beam is reported. This approach has been applied to an ErYAG laser, in-band pumped by an Er,Yb fiber laser, yielding 9.6 W of continuous-wave output at 1645 nm in a top-hat-like beam with beam propagation factor (M2)<2.1 for 24 W of incident pump power at 1532 nm. The corresponding slope efficiency with respect to incident pump power was 49%. The prospects of further scaling of output power and improved overall efficiency are considered.
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MEDLINE
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En
Ano de publicação:
2012
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Article