Source code for kqcircuits.elements.launcher

# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
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from kqcircuits.elements.element import Element
from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt

[docs]class Launcher(Element): """The PCell declaration for a launcher for connecting wirebonds. Default wirebond direction to west, waveguide to east. Uses default ratio ``a`` and ``b`` for scaling the gap if ``a_launcher`` and ``b_launcher`` are not specified. Taper length is from waveguide port to the rectangular part of the launcher pad. Pad width is also used for the length of the launcher pad. .. MARKERS_FOR_PNG 460,54 410,200 677,46 0,0,300,0 """ s = Param(pdt.TypeDouble, "Pad width", 300, unit="μm") l = Param(pdt.TypeDouble, "Tapering length", 300, unit="μm") a_launcher = Param(pdt.TypeDouble, "Outer trace width", 240, unit="μm") b_launcher = Param(pdt.TypeDouble, "Outer gap width", 144, unit="μm")
[docs] def build(self): # optical layer # shape for the inner conductor pts = [ pya.DPoint(0, self.a / 2 + 0), pya.DPoint(self.l, self.a_launcher / 2), pya.DPoint(self.l + self.s, self.a_launcher / 2), pya.DPoint(self.l + self.s, -self.a_launcher / 2), pya.DPoint(self.l, -self.a_launcher / 2), pya.DPoint(0, -self.a / 2 + 0) ] shifts = [ pya.DVector(0, self.b), pya.DVector(0, self.b_launcher), pya.DVector(self.b_launcher, self.b_launcher), pya.DVector(self.b_launcher, -self.b_launcher), pya.DVector(0, -self.b_launcher), pya.DVector(0, -self.b), ] pts2 = [p + s for p, s in zip(pts, shifts)] pts.reverse() shape = pya.DPolygon(pts + pts2) self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(shape) # protection layer shifts = [ pya.DVector(0, self.margin), pya.DVector(0, self.margin), pya.DVector(self.margin, self.margin), pya.DVector(self.margin, -self.margin), pya.DVector(0, -self.margin), pya.DVector(0, -self.margin), ] pts2 = [p + s for p, s in zip(pts2, shifts)] shape = pya.DPolygon(pts2) self.add_protection(shape) # add reference point self.add_port("", pya.DPoint(0, 0), pya.DVector(-1, 0))