- #1
DariusP
- 50
- 3
Hello, I wanted to ask about thermal lensing. Thermal lensing is when a temperature gradient from the center of the medium to the outermost part of the medium is created. This causes a varying refractive index throughout the medium.
What I want to ask is: Why is the core of the rod(or any other active medium) always hotter and the outermost part - cooler?
What I want to ask is: Why is the core of the rod(or any other active medium) always hotter and the outermost part - cooler?