Thermal lens study in diode pumped N-g- and N-p-cut Nd:KGd(WO4)(2) laser crystals

P. A. Loiko, K. V. Yumashev, N. V. Kuleshov, Vasili Savitski, S. Calvez, D. Burns, A. A. Pavlyuk

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Abstract

A comparative study of thermal lensing effect in diode laser pumped N-g- and N-p-cut Nd:KGd(WO4)(2) (KGW) laser crystals was performed for laser emission polarized along the principle refractive axis, N-m. The thermal lens in the N-g-cut Nd: KGW was found to be weakly astigmatic with a positive refractive power for both the N-m- and N-p-directions. For N-p -cut Nd: KGW, strong astigmatism was observed and the refractive powers in the N-g- and N-m-directions had opposing signs. The degree of astigmatism was found to be considerably weaker for the N-g-cut Nd: KGW in comparison with the N-p-cut one: 0.35 dptr/(W/cm(2)) and 2.85 dptr/(W/cm(2)), respectively. The ratio of the thermal lens refractive powers in the planes parallel and perpendicular to the laser emission polarisation were measured as + 1.4 and -0.425 for N-g- and N-p-cut Nd: KGW respectively. (C) 2009 Optical Society of America

Original languageEnglish
Pages (from-to)23536-23543
Number of pages8
JournalOptics Express
Volume17
Issue number26
DOIs
Publication statusPublished - 21 Dec 2009

Keywords

  • tungstate
  • raman lasers
  • lasers

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