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Rectangular Light intensity profile over a surface

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Hello,

I am trying to model a laser pulse which has a rectangular shape in 2D axisymmetric domain.
I have already modeled a Guassian shape with the equation: I0*exp(-2*(r/W)^2) as the boundary condition, where: I0: peak light intensity
r radial direction (i.e. the x axis) (Y axis is light falling on the surface)
W: beam width.
How do I express rectangular shape in mathematical expression using either step function or rectangular function?
Please suggest some ideas.
Thank you,
Ishan

0 Replies Last Post 6 déc. 2016, 23:50 UTC−5
COMSOL Moderator

Hello Ishan Bhalerao

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