DocumentCode :
1057106
Title :
Highly Efficient Passively 
-switched Yb:YAl 
(BO <sub>4</sub> crystal operating at ~1 mum with a Cr<sup>4+</sup>:YAG crystal used as the saturable absorber. Employing a compact plano-concave resonator end pumped by a high-power diode, we obtained by using a 2 mm thick alpha -cut crystal a sigma-polarized average output power of 4.15 W at 1041.3 nm with optical-to-optical and slope efficiencies as high as 48.3% and 59%, respectively. The Q-switched output power generated with the c-cut crystal (2 mm thick) was lower due to the crystal inhomogeneity: 3.15 W with a slope efficiency of 48%. The highest pulse energy, shortest pulse duration and highest peak power achieved with the a- and c-cut crystals were found to be nearly identical, being 139 muJ, 18 ns, and 7.33 kW, respectively.</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Q-switching; boron compounds; chromium; crystals; semiconductor lasers; ytterbium; yttrium compounds; Cr<sup>4+</sup>:YAG crystal; Cr<sup>4+</sup>:YAG laser; Q-switching; Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Cr<sup>4+</sup>; YAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>:Yb; Yb:YAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub> crystal; Yb:YAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub> laser; a-cut crystals; c-cut crystal; energy 139 muJ; high-power diode; passively Q-switched laser; plano-concave resonator; power 3.15 W; power 4.15 W; power 7.33 W; saturable absorber; size 2 mm; time 18 ns; wavelength 1041.3 nm; Crystalline materials; Diodes; Frequency conversion; Laser beam cutting; Neodymium; Nonlinear optics; Optical materials; Optical resonators; Power generation; Pump lasers; Diode pumped; Yb laser; Yb:YAl<formula formulatype=)
$_{3}$ (BO $_{3}$ )$_{4}$ $Q$
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2007.912455
Filename :
4446034
Link To Document :
