Laser performance and thermal lensing in flashlamp pumped N
p-cut and N
g-cut Nd:KGW crystals |
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| Authors: | P A Loiko I A Denisov K V Yumashev N V Kuleshov A A Pavlyuk |
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| Institution: | (1) Chemistry Department, M.V. Lomonosov Moscow State University, Vorob'evy Hills, 119992 GSP-2 Moscow, Russia;(2) Forschungszentrum Karlsruhe, Institut für Instrumentelle Analytik, Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;(3) The Institute for the Physics of Microstructures of Russian Academy of Sciences, 603600 GSP-105 Nizhni Novgorod, Russia;(4) Chemistry Department, M.V. Lomonosov Moscow State University, Vorob'evy Hills, 119992 GSP-2 Moscow, Russia |
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| Abstract: | A comparative experimental study of laser performance and thermal lensing properties in a flashlamp pumped Nd:KGW crystal
cut for the light propagating along the optical indicatrix axes N
p and N
g is presented. It was found that for both, the N
p-cut Nd:KGW and N
g-cut Nd:KGW thermal lens is astigmatic with astigmatism degree being determined mainly by the thermal expansion anisotropy
in KGW. The thermal lens in the N
g-cut Nd:KGW is positive, while in the N
p-cut Nd:KGW it has different signs for rays lying in two different meridional planes. The sensitivity factors show how much
the thermal lens optical power of a laser rod changes with pump power are determined. The results show that the N
g-cut Nd:KGW allows one to obtain higher average output powers at high pump levels as compared to the N
p-cut Nd:KGW. |
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