parameters.txt

cudos实例

	!       CUDOS Fibre Software sample parameter file
! This parameter file is for finding the fundamental mode of 
! a simple fibre consisting of a single hexagon of air cylinders in 
! a dielectric background with refractive index 1.45
! The structure is defined in the parameter file, and
! symmetries are used to reduce the problem.
! all internal parameters are adjusted automatically.
!
! First define the structure :

load structure file=rectangle.txt

! define physical parameters

lambda=1.55			! sets the wavelength

! ask the software to find all internal parameters :

suggest n_eff range=fundamental		! finds the range of effective indices where the 
					! fundamental mode should be
suggest order		! suggest appropriate Fourier Bessel series
			!  truncature parameter
		
start mode=1
stop mode=4
! Now find the modes

search modes				

! end of parameter file
end