Source code for kqcircuits.elements.airbridge_connection

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
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from kqcircuits.elements.airbridges.airbridge import Airbridge
from kqcircuits.elements.element import Element
from kqcircuits.elements.waveguide_coplanar import WaveguideCoplanar
from kqcircuits.elements.waveguide_coplanar_taper import WaveguideCoplanarTaper
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt, add_parameters_from

[docs]@add_parameters_from(Airbridge) @add_parameters_from(WaveguideCoplanarTaper, "*", m2=5) class AirbridgeConnection(Element): """The PCell declaration of an Airbridge with tapered waveguides in both ends. .. MARKERS_FOR_PNG 0,20 23,26 14,-15 """ bridge_gap_width = Param(pdt.TypeDouble, "Width of waveguide gap around the Airbridge", 12, unit="μm") with_side_airbridges = Param(pdt.TypeBoolean, "With airbridges on the sides", True) with_right_waveguide = Param(pdt.TypeBoolean, "With waveguide on right side", True) gap_between_bridges = Param(pdt.TypeDouble, "Inner distance between adjacent bridges", 20) waveguide_extra = Param(pdt.TypeDouble, "Waveguide extra length below airbridge", 0)
[docs] def build(self): # Add airbridges ab = self.add_element(Airbridge) ab_inst, ab_ref = self.insert_cell(ab, pya.DTrans.R90) if self.with_side_airbridges: self.insert_cell(ab, pya.DTrans(1, False, 0, self.bridge_width + self.gap_between_bridges)) self.insert_cell(ab, pya.DTrans(1, False, 0, -self.bridge_width - self.gap_between_bridges)) # Add left waveguide pad_a = self.bridge_width pad_b = self.bridge_gap_width wg_l_pos = ab_ref["port_a"] + pya.DVector(self.waveguide_extra, 0) taper_l_pos = ab_ref["port_a"] - pya.DVector(self.pad_length, 0) terminator_l = self.add_element(WaveguideCoplanar, path=[taper_l_pos, wg_l_pos], a=pad_a, b=pad_b, term1=0, term2=pad_b) self.insert_cell(terminator_l, pya.DTrans(0, 0)) taper_l = self.add_element(WaveguideCoplanarTaper, a2=pad_a, b2=pad_b) taper_l_ref = self.get_refpoints(taper_l) taper_l_inst, _ = self.insert_cell(taper_l, pya.DTrans(taper_l_pos-taper_l_ref["port_b"].to_v())) self.copy_port("a", taper_l_inst) # Optionally, add right waveguide if self.with_right_waveguide: wg_r_pos = ab_ref["port_b"] - pya.DVector(self.waveguide_extra, 0) taper_r_pos = ab_ref["port_b"] + pya.DVector(self.pad_length, 0) terminator_r = self.add_element(WaveguideCoplanar, path=[wg_r_pos, taper_r_pos], a=pad_a, b=pad_b, term1=pad_b, term2=0) self.insert_cell(terminator_r, pya.DTrans(0, 0)) taper_r = self.add_element(WaveguideCoplanarTaper, a=pad_a, b=pad_b) taper_r_ref = self.get_refpoints(taper_r) taper_r_inst, _ = self.insert_cell(taper_r, pya.DTrans(taper_r_pos-taper_r_ref["port_a"].to_v())) self.copy_port("b", taper_r_inst) else: wg_r_pos = ab_ref["port_b"] self.copy_port("b", ab_inst) # Add path path_airbridge = pya.DPath([wg_l_pos, wg_r_pos], self.bridge_width) self.cell.shapes(self.get_layer("waveguide_length")).insert(path_airbridge)