Basic: SOI
The simplest EMode simulation example.
This code example is licensed under the BSD 3-Clause License.
import emodeconnection as emc
## Set simulation parameters
wavelength = 1550 # [nm] wavelength
dx, dy = 10, 10 # [nm] resolution
w_core = 600 # [nm] waveguide core width
w_trench = 800 # [nm] waveguide side trench width
h_core = 500 # [nm] waveguide core height
h_clad = 800 # [nm] waveguide top and bottom clad
num_modes = 2 # [-] number of modes
## Connect and initialize EMode
em = emc.EMode()
## Settings
em.settings(
wavelength = wavelength, x_resolution = dx, y_resolution = dy,
window_width = w_core + w_trench*2, window_height = h_core + h_clad*2,
num_modes = num_modes, background_refractive_index = 'Air')
## Draw shapes
em.shape(name = 'BOX', refractive_index = 'SiO2', height = h_clad)
em.shape(name = 'core', refractive_index = 'Si', width = w_core, height = h_core)
## Launch FDM solver
em.FDM()
## Display the effective indices, TE fractions, and core confinement
em.report()
## Plot the field and refractive index profiles
em.plot()
## Close EMode
em.close()
% Set simulation parameters
wavelength = 1550; % [nm] wavelength
dx = 10; dy = 10; % [nm] resolution
w_core = 600; % [nm] waveguide core width
w_trench = 800; % [nm] waveguide side trench width
h_core = 500; % [nm] waveguide core height
h_clad = 800; % [nm] waveguide top and bottom clad
num_modes = 2; % [-] number of modes
% Connect and initialize EMode
em = emodeconnection();
% Settings
em.settings( ...
'wavelength', wavelength, 'x_resolution', dx, 'y_resolution', dy, ...
'window_width', w_core + w_trench*2, 'window_height', h_core + h_clad*2, ...
'num_modes', num_modes, 'background_refractive_index', 'Air');
% Draw shapes
em.shape('name', 'BOX', 'refractive_index', 'SiO2', 'height', h_clad);
em.shape('name', 'core', 'refractive_index', 'Si', 'width', w_core, 'height', h_core);
% Launch FDM solver
em.FDM();
% Display the effective indices, TE fractions, and core confinement
em.report();
% Plot the field and refractive index profiles
em.plot();
% Close EMode
em.close();
Console output:
EMode 0.1.1 - email
Meshing... completed in 0.1 sec
Solving... completed in 1.1 sec
Wavelength: 1550.0 nm
Mode # n_eff TE % Loss (dB/m)
-------- -------- ------ -------------
TE-0 3.026515 99.7 % 0.000
TM-1 2.980822 0.5 % 0.000
Exited EMode
Figures:
