lda0 1.55[um] Wavelength
f0 c_const/lda0 Frequency
n_clad 2.2 Cladding refractive index
n_core 2.22 Core refractive index
hx lda0/(6*n_core)/(1-cos(alpha)) Maximum element size in x-direction
hy lda0/(6*n_core)/sin(alpha) Maximum element size in y-direction
r13 30[pm/V] Electro-optic coefficient
V0 100[V] Applied voltage
epsr 35 Low-frequency relative permittivity