1 Answers
In optics, the complex beam parameter is a complex number that specifies the properties of a Gaussian beam at a particular point z along the axis of the beam. It is usually denoted by q. It can be calculated from the beam's vacuum wavelength λ0, the radius of curvature R of the phase front, the index of refraction n , and the beam radius w , according to:
Alternatively, q can be calculated according to
where z is the location at which q is calculated, relative to the location of the beam waist, zR is the Rayleigh range, and i is the imaginary unit.
6 views
Answered