Beam waist calculation for hg and ig beams

[ilent2]

What are the appropriate parameters for w0 for lg and hg beams? Is there a function to calculate this?

[AStilg]

lg_mode_w0 (in my fork, now) will do it for LG modes. For each degree of paraxial modes the beam waist is the same. The parameter input into that file would be: m+n=2p+abs(l)=\lambda etc.

More than this, bsc_pointmatch_farfield needs to (instead of using a polyfit) solves this iteratively as a step to undo the unholy tan aperture function.

[AStilg]

In 1.4 we will make bsc_pointmatch_farfield.m take an angle which should eliminate lg mode w0

[AStilg]

and... it's gone