EME: Taper
The simplest EMode example of an EME simulation.
This code example is licensed under the BSD 3-Clause License.
import emodeconnection as emc
## Set simulation parameters
wavelength = 1550 # [nm] wavelength
dx, dy = 20, 20 # [nm] resolution
h_core = 220 # [nm] waveguide core height
h_clad = 1000 # [nm] waveguide top and bottom clad
window_width = 4000
window_height = h_core + h_clad*2
num_modes = 10 # [-] number of modes
BC = 'TE'
## Connect and initialize EMode
em = emc.EMode(verbose = True)
## Settings
em.settings(
wavelength = wavelength, x_resolution = dx, y_resolution = dy,
window_width = window_width, window_height = window_height,
num_modes = num_modes, boundary_condition = BC,
background_material = 'SiO2')
## Draw shapes
em.shape(name = 'BOX', material = 'SiO2',
height = h_clad)
em.shape(name = 'core', material = 'Si',
height = h_core, etch_depth = h_core)
## Launch FDM solver and label profiles
em.shape(name = 'core', mask = 1000)
em.FDM(profile = 'a')
em.report()
em.plot()
em.shape(name = 'core', mask = 2000)
em.FDM(profile = 'b')
em.report()
em.plot()
## Draw EME sections
em.straight_section(
profile = 'a',
length = 2000)
em.taper_section(
profile = 'a', profile_end = 'b',
length = 8000)
em.straight_section(
profile = 'b',
length = 2000)
## Run EME and plot results
em.EME()
em.plot()
em.plot_S_matrix()
## Close EMode
em.close()
Console output:
EMode3D 1.0.1 - email
Meshing completed in 0.2 sec
Solving modes completed in 0.6 sec
Wavelength: 1550.0 nm
Mode # n_eff TE % Loss (dB/m)
-------- -------- ------ -------------
TE-0 2.744942 99.8 % 0.000
TE-1 1.819117 92.4 % 0.000
TM-2 1.665347 11.8 % 0.000
TE-3 1.421518 99.9 % 0.000
TE-4 1.368426 88.0 % 0.000
TM-5 1.359634 12.8 % 0.000
TE-6 1.321504 99.9 % 0.000
TM-7 1.279963 2.4 % 0.000
TE-8 1.250897 98.7 % 0.000
TE-9 1.189492 95.8 % 0.000
Meshing completed in 0.2 sec
Solving modes completed in 0.4 sec
Wavelength: 1550.0 nm
Mode # n_eff TE % Loss (dB/m)
-------- -------- ------- -------------
TE-0 2.821143 100.0 % 0.000
TE-1 2.606186 99.7 % 0.000
TE-2 2.123806 98.2 % 0.000
TM-3 1.939095 4.9 % 0.000
TM-4 1.565613 16.9 % 0.000
TE-5 1.441070 89.8 % 0.000
TE-6 1.391478 82.7 % 0.000
TE-7 1.362128 66.6 % 0.000
TM-8 1.333348 48.1 % 0.000
TE-9 1.285430 69.6 % 0.000
Solving S-matrices...
Solving section: 1... completed in 0.0 sec
Solving section: 2...
Solving slice at 4000.0 nm... completed in 0.6 sec
Solving slice at 6000.0 nm... completed in 0.5 sec
Solving slice at 2000.0 nm... completed in 0.6 sec
Solving slice at 7000.0 nm... completed in 0.6 sec
Solving slice at 5000.0 nm... completed in 0.5 sec
Solving slice at 3000.0 nm... completed in 0.6 sec
Solving slice at 1000.0 nm... completed in 0.6 sec
Solving slice at 7500.0 nm... completed in 0.6 sec
Solving slice at 6500.0 nm... completed in 0.5 sec
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Solving slice at 2500.0 nm... completed in 0.5 sec
Solving slice at 1500.0 nm... completed in 0.5 sec
Solving slice at 500.0 nm... completed in 0.5 sec
Solving slice at 7750.0 nm... completed in 0.5 sec
Solving slice at 7250.0 nm... completed in 0.5 sec
Solving slice at 6750.0 nm... completed in 0.5 sec
Solving slice at 6250.0 nm... completed in 0.5 sec
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Solving slice at 3750.0 nm... completed in 0.5 sec
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Solving slice at 5125.0 nm... completed in 0.6 sec
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Solving slice at 4125.0 nm... completed in 0.5 sec
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Solving slice at 3125.0 nm... completed in 0.6 sec
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Solving slice at 2375.0 nm... completed in 0.6 sec
Solving slice at 5437.5 nm... completed in 0.5 sec
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Solving slice at 5187.5 nm... completed in 0.5 sec
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Solving slice at 4187.5 nm... completed in 0.6 sec
Solving slice at 2562.5 nm... completed in 0.5 sec
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Solving slice at 4218.8 nm... completed in 0.5 sec
completed in 36.0 sec
Solving section: 3... completed in 0.0 sec
completed in 36.0 sec
Exited EMode
Figures:
