from __future__ import annotations
from functools import partial
import numpy as np
import gdsfactory as gf
from gdsfactory.components.via import via
from gdsfactory.components.via_stack import via_stack
from gdsfactory.cross_section import Section
from gdsfactory.typings import ComponentSpec, CrossSection, LayerSpec
[docs]
@gf.cell
def ring_single_pn(
gap: float = 0.3,
radius: float = 5.0,
doping_angle: float = 250,
cross_section: CrossSection = partial(
gf.cross_section.strip,
sections=(Section(width=2 * 2.425, layer="SLAB90", name="slab"),),
),
pn_cross_section: CrossSection = partial(
gf.cross_section.pn,
width_doping=2.425,
width_slab=2 * 2.425,
layer_via="VIAC",
width_via=0.5,
layer_metal="M1",
width_metal=0.5,
),
doped_heater: bool = True,
doped_heater_angle_buffer: float = 10,
doped_heater_layer: LayerSpec = "NPP",
doped_heater_width: float = 0.5,
doped_heater_waveguide_offset: float = 2.175,
heater_vias: ComponentSpec = partial(
via_stack,
size=(0.5, 0.5),
layers=("M1", "M2"),
vias=(
partial(
via,
layer="VIAC",
size=(0.1, 0.1),
spacing=(0.2, 0.2),
enclosure=0.1,
),
partial(
via,
layer="VIA1",
size=(0.1, 0.1),
spacing=(0.2, 0.2),
enclosure=0.1,
),
),
),
**kwargs,
) -> gf.Component:
"""Returns single pn ring with optional doped heater.
Args:
gap: gap between for coupler.
radius: for the bend and coupler.
doping_angle: angle in degrees representing portion of ring that is doped.
length_x: ring coupler length.
length_y: vertical straight length.
cross_section: cross_section spec for non-PN doped rib waveguide sections.
pn_cross_section: cross section of pn junction.
doped_heater: boolean for if we include doped heater or not.
doped_heater_angle_buffer: angle in degrees buffering heater from pn junction.
doped_heater_layer: doping layer for heater.
doped_heater_width: width of doped heater.
doped_heater_waveguide_offset: distance from the center of the ring waveguide to the center of the doped heater.
heater_vias: components specifications for heater vias.
kwargs: cross_section settings.
"""
from gdsfactory.pdk import get_grid_size
get_grid_size()
gap = gf.snap.snap_to_grid(gap, grid_factor=2)
c = gf.Component()
undoping_angle = 360 - doping_angle
bus_waveguide_path = gf.Path()
bus_waveguide_path.append(
gf.path.straight(length=2 * radius * np.sin(np.pi / 360 * undoping_angle))
)
bus_waveguide = c << bus_waveguide_path.extrude(cross_section=cross_section)
bus_waveguide.x = 0
doped_path = gf.Path()
doped_path.append(gf.path.arc(radius=radius, angle=-doping_angle))
undoped_path = gf.Path()
undoped_path.append(gf.path.arc(radius=radius, angle=undoping_angle))
doped_ring_ref = c << doped_path.extrude(cross_section=pn_cross_section)
undoped_ring_ref = c << undoped_path.extrude(cross_section=cross_section)
undoped_ring_ref.rotate(-undoping_angle / 2)
undoped_ring_ref.ymin = bus_waveguide.ymin + bus_waveguide.ports["o1"].width + gap
undoped_ring_ref.x = bus_waveguide.x
doped_ring_ref.connect("o1", undoped_ring_ref.ports["o1"])
if doped_heater:
heater_radius = radius - doped_heater_waveguide_offset
heater_path = gf.Path()
heater_path.append(
gf.path.arc(
radius=heater_radius, angle=undoping_angle - doped_heater_angle_buffer
)
)
heater_ref = c << heater_path.extrude(width=0.5, layer=doped_heater_layer)
heater_ref.rotate(-(undoping_angle - doped_heater_angle_buffer) / 2)
heater_ref.x = bus_waveguide.x
heater_ref.ymin = doped_heater_waveguide_offset + doped_heater_width / 2 + gap
left_heater_via = c << heater_vias()
left_heater_via.rotate(heater_ref.ports["o1"].orientation)
deltax = -abs(heater_ref.ports["o1"].x - left_heater_via.ports["e3"].x)
deltay = abs(heater_ref.ports["o1"].y - left_heater_via.ports["e3"].y)
left_heater_via.move((deltax, deltay))
right_heater_via = c << heater_vias()
right_heater_via.rotate(heater_ref.ports["o2"].orientation)
deltax = abs(heater_ref.ports["o2"].x - right_heater_via.ports["e3"].x)
deltay = abs(heater_ref.ports["o2"].y - right_heater_via.ports["e3"].y)
right_heater_via.move((deltax, deltay))
c.add_port("o1", port=bus_waveguide.ports["o1"])
c.add_port("o2", port=bus_waveguide.ports["o2"])
return c
if __name__ == "__main__":
# c = ring_single(layer=(2, 0), cross_section_factory=gf.cross_section.pin, width=1)
# c = ring_single(width=2, gap=1, layer=(2, 0), radius=7, length_y=1)
# print(c.ports)
# c = gf.routing.add_fiber_array(ring_single)
c = ring_single_pn()
print([i.name for i in c.get_dependencies()])
c.show(show_ports=True)
# cc = gf.add_pins(c)
# print(c.settings)
# print(c.settings)
# cc.show(show_ports=True)
