Investigation of Focus Shift due to Thermal Lensing

The advance of material processing technologies leads to more and more applications which utilize high-power laser sources. This generates a significant amount of heat in the individual components in the optical system which may introduce various optical effects such as the thermal lensing effect which will shift the focal length in a lens. In this use case, we demonstrate the focus shift generated by thermal lensing inside a focusing lens. The thermal lensing effect itself is defined by imported deformed surfaces and an inhomogeneous media which is calculated according to imported temperature data.  ​