Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
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.
Using PDE to model 3D Maxwell equations for wavelength generation
Posted 2 janv. 2013, 04:20 UTC−5 RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.0 0 Replies
Please login with a confirmed email address before reporting spam
I want to use PDE to model 3D Maxwell equations for wavelength generation by simulating the ultrafast laser beam interacting with gasous material in a gas cell. The equations in cylindrical coordinate are:
∇2 E(ρ, z, t)− 1/c2* ∂2E(ρ, z, t)/∂ t2 =ω2(ρ, z, t)/c2* E(ρ, z, t)+μ* ∂ J(ρ, z, t)/∂ t
∇2 E(ρ, z, t)− 1/c2* ∂2E(ρ, z, t)/∂ t2 = ω2(ρ, z, t)/c2* E(ρ, z, t)+μ* ∂2P(ρ, z, t)/∂ t2 .
Initial E(ρ, z, t) can be a simple Gauss equation,
ω(ρ, z, t) is plasma frequency and well known
J(ρ, z, t) is absorption term and known.
P(ρ, z, t) is nonlinear polarization and known.
C and μ are constants.
I can use 3.5 and 4.0 Comsol.
May i ask whether it is possible to use coefficient Form PDE?
How to set up COMSol PDE mode to model above equations?
the intial laser pulse will input from one side of gas cell and output new wavelength from the other side, how to integrate the geometry with PDE?
Is that possible to model propagation process?
thank you very much for any of your help in advance.
Johansen
Hello Scott Johansen
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.