Thermally induced lensing and depolarization by an Nd:YAG amplifier rod with a maximum pump power of 8 kW were measured. The beam waist position exhibited a nonlinear dependence on the pump power. From this, a linear relation between the refractive index change and pump power is derived, considering the propagation of the Gaussian probe beam in the laser rod with a quadratic index profile. The measured degree of polarization behind the laser rod confirms the thermal lens result that refractive index changes depend linearly on the pump power. Pumping above 5 kW leads to deviations of the refractive index distribution in the rod from radial symmetry.
No takes yet. Share an insight, caveat, or question.
Eichler et al. (1993) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: