TerminatePorts

class picazzo3.container.terminate_ports.TerminatePorts(*args, **kwargs)

Wraps a PCell in a container and terminates the ports specified by the user. If None is given for the port_labels, all ports will be suppressed.

You can also provide another PCell to the property ‘termination’ which will be attached to each terminated port (a stub, to remove reflections). If None is provided, a logical termination is added to the Netlist, but no termiantion is added in the layout.

Parameters:

termination: PCell, optional

cell which will be used to terminate the ports

termination_external_port_name_map: optional

dict to map the names of the termination ports that are exposed as external ports. The format is { ‘port_name_on_termination’ : ‘new_name_{port}’ }. The ‘{port}’ in the map will be replaced by the corresponding port name on the component.For instance, when you use grating couplers or detectors as terminations, this map allows you to map the name of the vertical port or the electrical ports to the name of the terminated port on the contents. Similarly, you can use {inst} to insert the name of the instance of the termination. By default, the behavior is ‘{inst}_{port}’.

termination_port_label: str, optional

label of the port on the termination that will be used to connect to the part of the contents. Default is ‘in’

trace_template: optional

Template for all ports. If None, the waveguide templates of the ports will be used

termination_instance_prefix: str, optional

Prefix for the instance names of the terminations. Default is taken from TECH.CONTAINER.TERMINATE_PORTS

auto_transition: optional

If True, automatically transition all ports of contents to the given trace template. If False, no transitions are applied, which might lead to a discontinuity in the waveguide. Also, if trace_template is None, no transitions are applied.

port_labels: optional

Labels of the ports to be processed. Set to None to process all ports.

contents: PCell, optional

the contents of the container: the child cell

external_port_names: optional

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

cell_instances: _PCellInstanceDict, optional

name: optional

The unique name of the pcell

termination_external_port_name_maps: locked

termination_port_labels: locked

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

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

list of templates to apply to all ports

Examples

""" Simulation example of terminated ring resonator"""
from technologies import silicon_photonics
import ipkiss3.all as i3
import numpy as np
from picazzo3.filters.ring import RingRect180DropFilter

my_ring = RingRect180DropFilter()

cp = dict(cross_coupling1=1j*0.05**0.5,       # The coupling from bus to ring and back
          straight_coupling1=0.95**0.5,       # Straight coupling
          )

my_ring.CircuitModel(ring_length=2*np.pi*10.0,
                     coupler_parameters=[cp, cp]
                     )

from picazzo3.container.terminate_ports import TerminatePorts
from picazzo3.logical.termination import Termination

my_termination = Termination()
my_termination.CircuitModel(reflection=0.5**0.5)
my_ring_terminated = TerminatePorts(contents=my_ring, port_labels=["W1"], termination=my_termination)
my_ring_terminated_nl = my_ring_terminated.Netlist()
my_ring_terminated_cm = my_ring_terminated.CircuitModel()

wavelengths =  np.linspace(1.535, 1.55, 800)
R = my_ring_terminated_cm.get_smatrix(wavelengths=wavelengths)

import pylab as plt
plt.figure()
plt.plot(wavelengths, 10*np.log10(abs(R["in1","in1"]**2)), "r-", label="reflection in1")
plt.plot(wavelengths, 10*np.log10(abs(R["in1","out1",:]**2)), "b-", label="in port to pass port (out1)")
plt.plot(wavelengths, 10*np.log10(abs(R["in1","in2",:]**2)), "g-", label="in port to add port (in2)")
plt.xlim([wavelengths[0], wavelengths[-1]])
plt.legend()
plt.show()

""" Layout example of terminated ring resonator """
from technologies import silicon_photonics
import ipkiss3.all as i3
from picazzo3.filters.ring import RingRect180DropFilter
my_ring = RingRect180DropFilter()
my_ring.Layout()
from picazzo3.container.terminate_ports import TerminatePorts
# Optionaly we can add a structure where the ports are suppressed
from picazzo3.apertures.basic import WireWgAperture
from picazzo3.traces.wire_wg import WireWaveguideTemplate
wire_t = WireWaveguideTemplate()
wire_t.Layout(core_width=2.0, cladding_width=6.0)
my_termination = WireWgAperture(name="my_termination", aperture_trace_template=wire_t)
my_termination.Layout(transition_length=4.0)
my_ring_terminated = TerminatePorts(contents=my_ring, port_labels=["E1"], termination=my_termination)
my_ring_terminated_layout = my_ring_terminated.Layout()
my_ring_terminated_layout.visualize()

Views

Layout

Parameters:

view_name: str, optional

The name of the view

termination_transformations: List with type restriction, allowed types: <class ‘ipkiss.geometry.transforms.no_distort.NoDistortTransform’>, optional

Transformations of the terminations. By default, these are calculated to match the ports of the contents.

contents_transformation: GenericNoDistortTransform, optional

flatten_contents: optional

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

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