Time-resolved measurement of thermally induced aberrations in a cryogenically cooled Yb:YAG slab with a wavefront sensor

0466507 - FZÚ 2017 RIV DE eng J - Journal Article
Sikocinski, Pawel - Novák, Ondřej - Smrž, Martin - Pilař, Jan - Jambunathan, Venkatesan - Jelínková, H. - Endo, Akira - Lucianetti, Antonio - Mocek, Tomáš
Time-resolved measurement of thermally induced aberrations in a cryogenically cooled Yb:YAG slab with a wavefront sensor.
Applied Physics B-Lasers and Optics. Roč. 122, č. 4 (2016), 1-10, č. článku 73. ISSN 0946-2171. E-ISSN 1432-0649
R&D Projects: GA MŠMT ED2.1.00/01.0027; GA MŠMT EE2.3.20.0143; GA MŠMT LO1602; GA ČR GA14-01660S
Grant - others:HILASE(XE) CZ.1.05/2.1.00/01.0027; OP VK 6(XE) CZ.1.07/2.3.00/20.0143
Institutional support: RVO:68378271
Keywords : solid-state laser * Yb-Yag
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 1.696, year: 2016

The time-resolved measurements of thermally induced wavefront aberrations in a cryogenically cooled Yb:YAG crystal are presented in dependence on temperature in the range between 250 and 130 K under non-lasing condition. A wavefront sensor was utilized to determine the wavefront aberrations. The wavefront distortions were experimentally studied for a cryogenically cooled Yb: YAG crystal in detail for the first time. The wavefront aberrations were significantly reduced at cryogenic temperatures including defocus which was the dominant aberration and which was responsible for the so-called thermal lensing effect. We found that defocus aberration is caused not only by thermally induced effects (responsible for thermal lens), but also by electronically induced change in the refractive index due to excitation of ion activators which is responsible for the electronic lensing.
Permanent Link: http://hdl.handle.net/11104/0264788