ModifiedWaveguideGratingPeriod

class picazzo3.wg.grating.cell.ModifiedWaveguideGratingPeriod

Period for a waveguide with modified parameters. The base definition is taken from the wg_template which is used for the ports. The modify_waveguide_parameters property then creates the blocks with modified widths, by adapting the properties of the individual waveguide template.

Parameters:

modified_waveguide_parameters: list

Dict of the parameters of the waveguide template that should be modified for the different sections of the Grating Period.

n_o_sections: int and number > 0

Number of sections in the grating period

wg_template: PCell and _WaveguideTemplate

Waveguide template of start and end of the period (and ports)

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:

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

Views

class Layout

Parameters:

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

"""In this example we build a grating from a modified slot waveguide.
Starting from the basic slot waveguide template, we define grating period sections
with different slot width and core width.
"""
import si_fab.all as pdk  # noqa: F401
from picazzo3.wg.grating import WaveguideUniformGrating, ModifiedWaveguideGratingPeriod
from picazzo3.traces.slot_wg import SlotWaveguideTemplate

t = SlotWaveguideTemplate(name="slot_t")
t.Layout(core_width=0.6, slot_width=0.15, cladding_width=3.0)

period = ModifiedWaveguideGratingPeriod(name="period", wg_template=t, n_o_sections=5)

# we modify the core width and the slot width
period.Layout(
    section_lengths=[0.1, 0.1, 0.3, 0.1, 0.1],
    modified_waveguide_parameters={
        "slot_width": [0.15, 0.18, 0.20, 0.18, 0.15],
        "core_width": [0.6, 0.59, 0.58, 0.59, 0.6],
    },
)

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

layout.visualize(annotate=True)