class picazzo3.wg.grating.cell.WaveguideSideRibGratingPeriod(*args, **kwargs)

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)


wg_template: PCell and _WaveguideTemplate and RibWireWaveguideTemplate

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

n_o_sections: int and number > 0

Number of sections in the grating period


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



view_name: str and ( Alphanumeric string or Contains _$ )

The name of the view

width_parameter_name: str and ( Alphanumeric string or Contains _$ )

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’.

relative_widths: ( bool, bool_, bool or int )

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

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.


""" We make a grating based on a wire waveguide and modify the width of the core
to create side gratings:
from technologies import silicon_photonics
from ipkiss3 import all as i3
from picazzo3.wg.grating import WaveguideUniformGrating, WaveguideSideRibGratingPeriod

period = WaveguideSideRibGratingPeriod(name="period_sr",

# 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],

grating = WaveguideUniformGrating(name="my_siderib_grating",
layout = grating.Layout()