Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Saturation of the absorption coefficient
Posted Jul 8, 2022, 10:04 a.m. EDT Heat Transfer, Materials, Studies & Solvers Version 5.5 0 Replies
Please login with a confirmed email address before reporting spam
Hello everybody,
I want to simulate the temperature distribution in a crystal under laser radiation. How can I account for the saturation effect of the absorption coefficient in the medium using the following formula: 
?
where 
- saturated absorption coefficient [1/m] ; 
- unsaturated absorption coefficient [1/m]; 
- saturation intensity [W/m^2] ; 
- laser intensity [W/m^2]; 
- radial coordinate of the crystal; z - longtitudal coordinate.
And it should be taken into account that the intensity itself also changes along the entire crystal. This process can be described through Beer–Lambert law in differential form:
Thanks if anyone can help.
Hello Elizaveta Andreevna Kozlova
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.