finesse.gaussian.BeamParam.beamsize¶

BeamParam.beamsize(z=None, wavelength=None, nr=None, w0=None)[source]¶

Computes the radius of the beam as a function of any of the dependent arguments.

Calling this method with no arguments is equivalent to accessing BeamParam.w.

Parameters

zfloat, optional: Distance along optical axis relative to waist, defaults to BeamParam.z for this beam parameter.
wavelengthfloat, optional: Wavelength of the beam to use, defaults to BeamParam.wavelength for this beam parameter.
nrfloat, optional: Refractive index to use, defaults to BeamParam.nr for this beam parameter.
w0float, optional: Waist-size of the beam, defaults BeamParam.w0 for this beam parameter.

Returns