Need help implementing finite difference method for BPM

[yashabyadav]

I am trying to apply finite difference scheme for Beam propagation method by following this paper.

I was wondering if anyone can share their code if they have implemented this method. I can share my code which is not working as expected and can get some insights if possible.

 

[fresh_42]

I am trying to apply finite difference scheme for Beam propagation method by following this paper.

I was wondering if anyone can share their code if they have implemented this method. I can share my code which is not working as expected and can get some insights if possible.

Please post a full description and your questions.

a) The article you linked to costs $40 and I doubt that anybody is willing to pay this.
b) Teach me the finite-element method is far too broad. We cannot provide entire lectures.