gplugins.tidy3d.write_sparameters_grating_coupler#
- gplugins.tidy3d.write_sparameters_grating_coupler(component: ComponentSpec, dirpath: str | Path | None = None, filepath: str | Path | None = None, overwrite: bool = False, port_waveguide_name: str = 'o1', fiber_port_prefix: str = 'o2', verbose: bool = False, run: bool = True, **kwargs) dict[str, ndarray[Any, dtype[float64]]] [source]#
Get sparameter matrix from a gdsfactory grating coupler.
Assumes grating coupler waveguide port is facing to the left (west).
TODO: add a fiber model (more realistic than a gaussian_beam).
- Parameters:
component – grating coupler gdsfactory Component to simulate.
dirpath – directory to store sparameters in npz. Defaults to active Pdk.sparameters_path.
filepath – optional sparameters file.
overwrite – overwrites stored Sparameter npz results.
verbose – prints info messages and progressbars.
run – runs simulation, if False, only plots simulation.
- Keyword Arguments:
port_extension – extend ports beyond the PML.
layer_stack – contains layer to thickness, zmin and material. Defaults to active pdk.layer_stack.
thickness_pml – PML thickness (um).
xmargin – left/right distance from component to PML.
xmargin_left – left distance from component to PML.
xmargin_right – right distance from component to PML.
ymargin – left/right distance from component to PML.
ymargin_top – top distance from component to PML.
ymargin_bot – bottom distance from component to PML.
zmargin – thickness for cladding above and below core.
clad_material – material for cladding.
box_material – for bottom cladding.
substrate_material – for substrate.
box_thickness – bottom cladding thickness in (um).
substrate_thickness – (um).
port_waveguide_name – input port name.
port_margin – margin on each side of the port.
distance_source_to_monitors – in (um) source goes before monitors.
port_waveguide_offset – mode solver workaround. positive moves source forward, negative moves source backward.
wavelength – source center wavelength (um). if None takes mean between wavelength_start, wavelength_stop.
wavelength_start – in (um).
wavelength_stop – in (um).
wavelength_points – number of wavelengths.
plot_modes – plot source modes.
num_modes – number of modes to plot.
run_time_ps – make sure it’s sufficient for the fields to decay. defaults to 10ps and counts on the automatic shutoff to stop earlier if needed.
fiber_port_prefix – port prefix to place fiber source.
fiber_xoffset – fiber center xoffset to fiber_port_name.
fiber_z – fiber zoffset from grating zmax.
fiber_mfd – fiber mode field diameter (um).
fiber_angle_deg – fiber_angle in degrees with respect to normal.
material_name_to_tidy3d – dispersive materials have a wavelength dependent index. Maps layer_stack names with tidy3d material database names.
is_3d – True by default runs in 3D.
with_all_monitors – stores all monitor fields.
kwargs – simulation settings.