wl 1[um] Wavelength
f0 c_const/wl Frequency
w0 10*wl Spot radius
z0 pi*w0^2/wl Rayleigh range
alpha atan(n2) Angle of incidence (at Brewster angle)
a 6*w0 Width
b n2*a Propagation length
n2 1.5 Refractive index
alpha2 asin(sin(alpha)/n2) Refracted angle
k0 2*pi/wl Wave number in air
k1x_air k0 Wave vector in air, first wave, x component
k1y_air 0[1/m] Wave vector in air, first wave, y component
k2x_air -k0*cos(2*alpha) Wave vector in air, second wave, x component
k2y_air -k0*sin(2*alpha) Wave vector in air, second wave, y component
k1x_glass k0*n2*cos(alpha-alpha2) Wave vector in glass, first wave, x component
k1y_glass k0*n2*sin(alpha-alpha2) Wave vector in glass, first wave, y component
k2x_glass -k0*n2*cos(alpha+alpha2) Wave vector in glass, second wave, x component
k2y_glass -k0*n2*sin(alpha+alpha2) Wave vector in glass, second wave, y component