Creating simulation object

Simulation export begins by creating an instance of Simulation class. The simulation object includes following information:

• name (defines export filenames)

• geometry for the simulation

• port locations and types

Geometry from Klayout GUI

When you have an active project open, import the following and get the top cell:

from kqcircuits.klayout_view import KLayoutView
from kqcircuits.simulations.simulation import Simulation

top_cell = KLayoutView(current=True).active_cell

Create an instance of Simulation:

simulation = Simulation.from_cell(top_cell, name='Dev', margin=100)

The simulation object is needed for Ansys export and Sonnet export (more details in following sections). Alternatively, run following macros in Klayout:

• scripts/macros/export/export_ansys.lym

• scripts/macros/export/export_sonnet.lym

Geometry from KQCircuits library

Define the geometry and ports in KQCircuits by inheriting Simulation class. Following creates waveguide crossing the domain box:

from kqcircuits.simulations.simulation import Simulation
from kqcircuits.pya_resolver import pya
import sys
import logging
from kqcircuits.util.export_helper import get_active_or_new_layout

class WaveguideSimulation(Simulation):
    def build(self):
        self.produce_waveguide_to_port(pya.DPoint(self.box.left, self.box.center().y),
                                       pya.DPoint(self.box.right, self.box.center().y),
                                       1, 'right', use_internal_ports=False)

Get layout for Simulation object:

logging.basicConfig(level=logging.WARN, stream=sys.stdout)
layout = get_active_or_new_layout()

Create an instance of Simulation:

simulation = WaveguideSimulation(layout, name='Dev', box=pya.DBox(pya.DPoint(0, 0), pya.DPoint(500, 500)))

The Simulation class and it’s subclasses are located in folder kqcircuits/simulations/.