# 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: Other Parameters: termination: PCell cell which will be used to terminate the ports termination_external_port_name_map: 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 label of the port on the termination that will be used to connect to the part of the contents. Default is ‘in’ trace_template: ( PCell and _WaveguideTemplate ), *None allowed* Template for all ports. If None, the waveguide templates of the ports will be used termination_instance_prefix: str and ( Alphanumeric string or Contains _$) Prefix for the instance names of the terminations. Default is taken from TECH.CONTAINER.TERMINATE_PORTS auto_transition: ( bool, bool_, bool or int ) 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: ( List with type restriction, allowed types: ), *None allowed* Labels of the ports to be processed. Set to None to process all ports. contents: PCell the contents of the container: the child cell external_port_names: Dictionary for remapping of the port names of the contents to the external ports name: The unique name of the pcell termination_external_port_name_maps: locked termination_port_labels: locked terminations: List with type restriction, allowed types: , locked trace_templates: List with type restriction, allowed types: , locked list of templates to apply to all ports Examples """ 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(annotate=True)  """ 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()  Views Layout Parameters: view_name: str and ( Alphanumeric string or Contains _$ ) The name of the view termination_transformations: List with type restriction, allowed types: Transformations of the terminations. By default, these are calculated to match the ports of the contents. contents_transformation: GenericNoDistortTransform flatten_contents: ( bool, bool_, bool or int ) if True, it will insert the contents as elements in the layout, rather than as an Instance