finesse.solutions.beamtrace.PropagationSolution.waistpos

PropagationSolution.waistpos(from_point)[source]

Waist position as measured at from_point.

Parameters:
See :meth:`.PropagationSolution.q`.
Returns:
wfloat or Function

Distance to the waist from the specified node.

Raises:
See PropagationSolution.q().