class picazzo3.filters.ring.cell.RingRoundedShape(*args, **kwargs)

A ring resonator based on a rounded shape, without couplers.

The Layout takes a shape, and a trace template. The trace template is turned into a RoundedTraceTemplate with the user supplied bend_radius and rounding_algorithm.

By default, this ring has no couplers. you can supply the couplers manually as a list of child cells through the property ‘couplers’, or you can subclass this PCell to define the couplers internally.


ring_trace_template: PCell and _WaveguideTemplate

Trace template for the ring waveguide

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

list of coupler PCells

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

list of Ring PCells


The unique name of the pcell

Other Parameters:

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

Trace templates for the ring segments. Locked, as there is only one segment in this Ring. Use ‘ring_trace_template’ instead.

See also

RingTraces, RingShape, RingRect



angle_step: float and number > 0

Angle step for rounding.


Parameters for the couplers. This is a list of dicts, and the length of the list should be the same as the number of couplers

manhattan: ( bool, bool_, bool or int )

Adds rectangular blocks in the bends to avoid as much as possible non-manhattan angles.

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

The name of the view

shape: Shape

Shape of the ring

shape_position: Coord2

Translation of the shape.

area_layer_on: ( bool, bool_, bool or int )

When True, the Ring area will be covered by i3.Rectangles on all cover layers of the ring waveguide template.


list of coupler transformations

bend_radius: float and number > 0

Bend radius for the auto-generated bends.


Rounding algorithm used to generate the bends. Can be circular, spline, ….

Other Parameters:

shapes: locked

Shapes of the ring segments. Locked, as there is only 1 ring segment. Use ‘shape’ instead


""" This example demonstrates a generic ring consisting of a user-defined control shape
which is drawn by rounding using the provided trace template with a given bend radius
from technologies import silicon_photonics
from ipkiss3 import all as i3
from picazzo3.filters.ring import RingRoundedShape
from picazzo3.traces.wire_wg.trace import WireWaveguideTemplate

wg_t = WireWaveguideTemplate(name="wg_template_2")

shape = i3.ShapeCross(box_size=26.0, thickness=13.0)

ring = RingRoundedShape(name="my_roundedring",
layout = ring.Layout(shape=shape,