Thermal lens compensation in high average power diode pumped Nd:YVO₄laser using aspheric mirror

Abstract

We demonstrate a high-power, diode-pumped, pulsed Nd:YVO4 laser with a 1.2 diffraction-limited output of 9.5 W using a thin film deposition technology made aspheric mirror to correct the thermally induced phase distortion of the lasing medium.

Analytical model for thermal lensing and spherical aberration in diode side-pumped Nd:YAG laser rod having Gaussian pump profile

“…[8][9][10][11] Therefore a lot of methods have been used to compensate for the thermal effects. [12][13][14][15][16][17][18][19][20][21][22][23] Usually to calculate the thermal effects of laser crystals, numerical finite element (FE) methods [24][25][26] are used because the currently known analytical models are limited. The most important disadvantage of FE simulations is the time needed for making the calculations, as several minutes or even hours are needed; but the computation that uses an analytical model for the thermal effects takes only a few seconds.…”