Hi Hina,

I don’t see your images unfortunately (it says “Image could not be loaded”) :(

Without seeing your images, I can point you to this excerpt from the Help File about this analysis feature:

Paraxial Gaussian beams are limited to on-axis simply astigmatic systems

This means that if the beam is not colinear with the optical axis and/or you have elements in your system with an optical power that is not rotationally symmetric or at least aligned with the X and Y axes, this analysis will not work. Which is probably why you are always seeing the same result. It probably ignores your coordinate breaks.

It might sound surprising, but even if you beam is rotationally symmetric, and your optics is rotationally symmetric as well. The simple fact that your beam could hit a lens at an off-axis position creates general astigmatism, which is more complex to handle than simple astigmatism.

I highly recommend this webinar from Paul Colbourne, where he describes a method to trace generally astigmatic Gaussian beams. It will probably not be an easy solution to implement, but it sounds feasible.

Alternatively, you could use a Gaussian apodization and look at the spot diagram.

Perhaps not the answer you were looking for, but hopefully you can make something out of it.

Take care,

David

Hello David, 
 

Thank you so much for answering. I will refer this seminar and see if I can find solution. 

Here, I attach again my images. I hope you can see it now. 

Best regards,

Hina

Thanks for commenting, David. @Hina did this work for you?