Deformable mirror correction of a thermal lens induced in the active rod of a solid state laser

Active mirrors for intra-cavity compensation of the aspherical thermal lens in thin-disk lasers

“…[3][4][5]9 To match the step-like shape of the aspheric phase distortions introduced by a pumped laser disk, the surface deformation of the compensating mirror has to be aspherical as well. This can be achieved by shaping the rear surface of the mirror to tailor the local stiffness.…”

“…2 An approach investigated for the compensation of the strong thermally induced lenses occuring in rod-type laser crystals is the use of actively deformable mirrors. [3][4][5] The compensation of the aspherical phase distortion present in thin-disk laser crystals by means of active mirrors 6, 7 has however not yet been investigated in depth.…”

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.…”

Towards a Compact Thin-Disk-Based Femtosecond XUV Source

“…iii of opposite sign [28], using a deformable mirror [71,72] or by implementing a telescope inside the cavity [73]. The influence of the thermal lens on the resonator stability was addressed by Magni [74].…”