WaveguideSideRibGratingPeriod

class picazzo3.wg.grating.cell.WaveguideSideRibGratingPeriod

Period for a RibWire waveguide with side gratings defined in the outer edge. The base definition is taken from the wg_template which is used for the ports. The widths property then creates the blocks with modified widths, based on the original. (another parameter can be adapted by changing the property width_property_name)

Parameters:

n_o_sections: int and number > 0

Number of sections in the grating period

wg_template: PCell and _WaveguideTemplate and RibWireWaveguideTemplate

Waveguide template of start and end of the period (and ports). Should be a RibWireWaveguide template.

name: String that contains only ISO/IEC 8859-1 (extended ASCII py3) or pure ASCII (py2) characters

The unique name of the pcell

Other Parameters:

modified_waveguide_parameters: locked

wg_templates: List with type restriction, allowed types: <class ‘ipkiss3.pcell.cell.pcell.PCell’>, locked

Views

class Layout

Parameters:

relative_widths: ( bool, bool_ or int )

If True, the values of the width are relative to the original value.

width_parameter_name: String that contains only alphanumeric characters from the ASCII set or contains _$. ASCII set is extended on PY3.

Name of the property of the waveguide template that is to be adjusted by the values in ‘widths’.

widths: list<Real, number>

The modified widths of the waveguide core. If ‘relative_widths’ is True, the values are relative to the original core width. It is also possible to adjust another parameter than ‘strip_width’ by overriding the ‘width_parameter_name’.

section_lengths: list<number >= 0>

List of lengths for the waveguide templates

length: float and Real, number and number >= 0

Length of the grating period.

view_name: String that contains only alphanumeric characters from the ASCII set or contains _$. ASCII set is extended on PY3.

The name of the view

Examples

"""We make a grating based on a wire waveguide and modify the width of the core
to create side gratings:
"""
import si_fab.all as pdk  # noqa: F401
from picazzo3.wg.grating import WaveguideUniformGrating, WaveguideSideRibGratingPeriod

period = WaveguideSideRibGratingPeriod(name="period_sr", n_o_sections=3)

# we modify the width with +/- 50nm
# relative to the original core width
period.Layout(section_lengths=[0.1, 0.13, 0.1], widths=[-0.05, +0.05, -0.05], relative_widths=True)

grating = WaveguideUniformGrating(name="my_siderib_grating", period_cell=period, n_o_periods=12)
layout = grating.Layout()

layout.visualize(annotate=True)