WgBend

class picazzo3.wg.bend.cell.WgBend

Fixed Waveguide bend of an arbitrary angle. This is a rounded waveguide, so it takes a rounding algorithm and a bend radius as a parameter, as well as a trace_template.

Parameters:

trace_template: PCell and _WaveguideTemplate

external_port_names: str

Dictionary for remapping of the port names of the contents to the external 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:

contents: PCell and _Trace, locked

Views

class Layout

Parameters:

angle: float

angular coverage of the bend

start_angle: float

start_angle of the bend. Negative is clockwise, positive is counterclockwise

output_port: TracePort

trace_template_for_ports: _TraceTemplate.Layout

Trace template to be used for the ports.

shape: Shape

Shape from which the Trace is calculated

cover_layers: List with type restriction, allowed types: <class ‘ipkiss.primitives.layer.Layer’>

layers that can be used to generate additional coverage of the trace (e.g. manhattan corners)

reverse_individual_bends: list<( bool, bool_ or int )>

When set to True, it will generate the individual bends backwards. This has only effect when the bend algorithm is not symmetric. Should have length equal to the shape for closed shapes, but equal to shape-2 for open shapes.

rounding_algorithms:

Rounding algorithm for every individual bend. Can be circular, spline, … Should have length equal to the shape for closed shapes, but equal to shape-2 for open shapes.

bend_radii: list<number > 0>

Bend radius for every individual bend.

reverse_bends: ( bool, bool_ or int )

When set to True, it will generate the bends backwards. This has only effect when the bend algorithm is not symmetric.

remove_straight_angles: ( bool, bool_ or int )

Removes the waypoints with straight angles. Set to False if the algorithm uses waypoint-specific information.

core_layer: __Layer__

layer used to define the core of the waveguide

input_port: TracePort

control_shape_layer: __Layer__

layer on which the control shape is drawn

draw_control_shape: ( bool, bool_ or int )

draws the control shape on top of the waveguide

contents_transformation: GenericNoDistortTransform

transformation to apply to the contents

flatten_contents: ( bool, bool_ or int )

if True, it will insert the contents as elements in the layout, rather than as an Instance

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

manhattan: ( bool, bool_ or int )

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

angle_step: float and number > 0

Angle step for rounding.

rounding_algorithm:

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

bend_radius: float and number > 0

Bend radius for the auto-generated bends.

Other Parameters:

center_line_shape: locked

Automatically calculated shape of the center line of the trace

Examples

import si_fab.all as pdk  # noqa: F401
from picazzo3.wg.bend import WgBend
from picazzo3.traces.wire_wg.trace import WireWaveguideTemplate
import ipkiss3.all as i3

wg_t = WireWaveguideTemplate()
wg_t.Layout(core_width=0.550, cladding_width=i3.TECH.WG.CLADDING_WIDTH, core_process=i3.TECH.PROCESS.WG)
C = WgBend(trace_template=wg_t)
layout = C.Layout(bend_radius=20.0, start_angle=45.0, angle=-120)
layout.visualize(annotate=True)