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Elliptical spot to circular using a semiconductor laser

tron_ccp
in Physics

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Hello everyone, this is my first post and the reason I joined.

I have a semiconductor laser from Thorlabs 

https://www.thorlabs.com/thorproduct.cfm?partnumber=LDM635

Which has a transverse mode that's not ideal for my application. I need a beam profile as close to a tem00 free of aberrations, and I get what's usual with laser diodes, which is an elliptical mode.

 

I would like your opinions regarding which is the best (simple, cheap, optimal) way to circularize an elliptical beam.

Thanks in advance for your time and apologies if this is the wrong forum, I couldn't find anything labeled "optics", "laser" or "lab gear".

We've used cylindrical lenses and also anamorphic prism pairs in my labs. You can clean up the mode with a spatial filter -- a pinhole at the waist of a telescope lens setup.

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