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- Title
Thermal Lensing in Diode-Pumped Yb:KGd(WO<sub>4</sub>)<sub>2</sub> Lasers.
- Authors
NIU, R.-L.; LIU, J.; ZHAO, Y.-F.; LIU, C.-C.; LIU, Y.; QIN, L.-J.
- Abstract
Based on the features of diode-pumped lasers, a thermal model of the square cross-section of a Yb:KGd(WO4)2 (Yb:KGW) laser crystal was established. According to the latest reports on thermal parameters and considering the heat transfer on side surfaces, temperature distribution pumped-face distortion and thermal lens local length were obtained by solving the anisotropy heal conductive equation. Under pump powers of 16 W, the highest temperature located at the centre of the pumped front surface was 309.9 °C, the maximum distortion was 0.55 µm and the thermal lens focal length at the pump spot was 4.2 cm. It is shown that thermal lensing in b-cut Yb:KGW is quite serious and it can be lessened if the heat transfer is considered. As such, based on the calculations of thermal lens focal length, we designed a plane-concave cavity and then made a further study on the continuous output performances of diode-pumped Yb:KGW lasers.
- Subjects
THERMAL analysis; HEAT transfer; DIODES; SOLID-state lasers; ANISOTROPY; THERMAL conductivity; FINITE differences; TEMPERATURE effect
- Publication
Lasers in Engineering (Old City Publishing), 2012, Vol 22, Issue 1/2, p25
- ISSN
0898-1507
- Publication type
Article