class picazzo3.wg.spirals.cell.SingleSpiral(*args, **kwargs)

Single spiral class going from the inside to the outside. The trace template provided in the property trace_template is used to build a chain of waveguides.


n_o_loops: int and number > 0, optional

Number of loops in the spiral

trace_template: PCell and _TraceTemplate, optional

Trace template used in the chain.

cell_instances: _PCellInstanceDict, optional

name: optional

The unique name of the pcell

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

n_o_traces: int and number > 0, locked

Total number of traces used in the spiral.



view_name: str, optional

The name of the view

inner_size: Coord2, optional

Inner size of the the spiral, defaults to 3 * spacing + 2 * bend_radius, in each direction

spacing: float and Real, number and number >= 0, optional

spacing between the individual loops.

spiral_center: Coord2, optional

locatation of the center of the spiral.

shapes: list, optional

List of shapes used to build the traces

flatten: optional

If true the instances are flattened

auto_transform: locked

grids_per_unit: locked

Number of grid cells per design unit

units_per_grid: locked

Ratio of grid cell and design unit

grid: float and number > 0, locked

design grid. Extracted by default from TECH.METRICS.GRID

unit: float and number > 0, locked

design unit. Extracted by default from TECH.METRICS.UNIT


# Example of single spiral using a trace template.
from technologies import silicon_photonics
from picazzo3.wg.spirals import SingleSpiral
from ipkiss3 import all as i3

cell = SingleSpiral(n_o_loops=5, trace_template=i3.TECH.PCELLS.WG.DEFAULT)
layout = cell.Layout(inner_size=(20, 15),
                     spiral_center=(2, 1))