[PDF]    http://dx.doi.org/10.3952/lithjphys.49212

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 49, 163–170 (2009)


CW AND Q-SWITCHED PERFORMANCE OF END-PUMPED Yb:YAG LASER WITH ELLIPTICAL MODE GEOMETRY
R. Antipenkov, D. Stučinskas, and A. Varanavičius
Department of Quantum Electronics, Vilnius University, Saulėtekio 9, LT-10222 Vilnius, Lithuania
E-mail: darius.stucinskas@ff.vu.lt

Received 16 January 2009; revised 8 June 2009; accepted 18 June 2009

We report the high beam quality diode end-pumped Q-switched Yb:YAG laser operating at 1030 nm wavelength with elliptical cavity mode configuration operating at 1–100 kHz repetition rates. We have performed measurements of highly astigmatic thermal lens in laser active element by means of Shack–Hartmann wavefront sensor that provides necessary data for laser cavity design. With optimized laser cavity the output beam quality parameter M2 does not exceed 1.2 value even at maximum pump power of 50 W.
Keywords: Yb:YAG, elliptical mode, thermal lens
PACS: 42.55.Xi, 42.60.By


NUOLATINĖS IR IMPULSINĖS VEIKOS IŠILGINIO KAUPINIMO Yb:YAG LAZERIS SU ELIPTINE REZONATORIAUS MODA
R. Antipenkov, D. Stučinskas, A. Varanavičius
Vilniaus universitetas, Vilnius, Lietuva

Išnagrinėta išilginio diodinio kaupinimo Yb:YAG lazerio su eliptine moda veika. Kaupinant plokštelės formos aktyvųjį elementą eliptiniu pluoštu, susidaro stipriai astigmatinis termolęšis. Atlikti termolęšio matavimai Shack'o ir Hartmann'o bangos fronto matuokliu; gauti rezultatai panaudoti matematiškai modeliuojant lazerio rezonatorių. Surinkto eksperimentinio lazerio išėjimo galia nuolatinės veikos režime siekia 8 W (esant 52 W kaupinimo galiai). Moduliuotos kokybės režime lazeris generuoja 8 ns trukmės impulsus, o vidutinė galia siekia 5 W. Lazerio pluošto kokybės parametras M2 neviršija 1,2 net esant maksimaliai kaupinimo galiai.


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