from __future__ import annotations
import gdsfactory as gf
from gdsfactory.components.mzi import mzi as mzi_function
from gdsfactory.components.pad import pad_small
from gdsfactory.components.straight_heater_metal import straight_heater_metal
from gdsfactory.routing.get_route import get_route
from gdsfactory.typings import ComponentSpec, CrossSectionSpec
[docs]
@gf.cell
def mzi_pads_center(
ps_top: ComponentSpec = straight_heater_metal,
ps_bot: ComponentSpec = straight_heater_metal,
mzi: ComponentSpec = mzi_function,
pad: ComponentSpec = pad_small,
length_x: float = 500,
length_y: float = 40,
mzi_sig_top: str = "top_r_e2",
mzi_gnd_top: str = "top_l_e2",
mzi_sig_bot: str = "bot_l_e2",
mzi_gnd_bot: str = "bot_r_e2",
pad_sig_bot: str = "e1_1_1",
pad_sig_top: str = "e3_1_3",
pad_gnd_bot: str = "e4_1_2",
pad_gnd_top: str = "e2_1_2",
delta_length: float = 40.0,
cross_section: CrossSectionSpec = "xs_sc",
cross_section_metal: CrossSectionSpec = "xs_metal_routing",
pad_spacing: float | str = "pad_spacing",
min_straight_length: float = 5.0,
**kwargs,
) -> gf.Component:
"""Return Mzi phase shifter with pads in the middle.
GND is the middle pad
and is shared between top and bottom phase shifters.
Args:
ps_top: phase shifter top.
ps_bot: phase shifter bottom.
mzi: interferometer.
pad: pad function.
length_x: horizontal length.
length_y: vertical length.
mzi_sig_top: port name for top phase shifter signal.
mzi_gnd_top: port name for top phase shifter GND.
mzi_sig_bot: port name for top phase shifter signal.
mzi_gnd_bot: port name for top phase shifter GND.
pad_sig_bot: port name for top pad.
pad_sig_top: port name for top pad.
pad_gnd_bot: port name for top pad.
pad_gnd_top: port name for top pad.
delta_length: mzi length imbalance.
cross_section: for the mzi.
cross_section_metal: for routing metal.
pad_spacing: pad pitch in um.
kwargs: routing settings.
"""
c = gf.Component()
pad_spacing = gf.get_constant(pad_spacing)
mzi_ps = mzi(
length_x=length_x,
straight_x_top=ps_top,
straight_x_bot=ps_bot,
length_y=length_y,
delta_length=delta_length,
cross_section=cross_section,
)
port_names = list(mzi_ps.ports.keys())
for port_name in [mzi_sig_top, mzi_gnd_top, mzi_sig_bot, mzi_gnd_bot]:
if port_name not in port_names:
raise ValueError(f"port {port_name!r} not in {port_names}")
m = c << mzi_ps
pads = c << gf.components.array(
component=pad, columns=3, rows=1, spacing=(pad_spacing, pad_spacing)
)
pads.x = m.x
pads.y = m.y
route_sig_bot = get_route(
m.ports[mzi_sig_bot],
pads.ports[pad_sig_bot],
cross_section=cross_section_metal,
bend=gf.components.wire_corner,
min_straight_length=min_straight_length,
**kwargs,
)
c.add(route_sig_bot.references)
route_gnd_bot = get_route(
m.ports[mzi_gnd_bot],
pads.ports[pad_gnd_bot],
cross_section=cross_section_metal,
bend=gf.components.wire_corner,
min_straight_length=min_straight_length,
**kwargs,
)
c.add(route_gnd_bot.references)
route_gnd_top = get_route(
m.ports[mzi_gnd_top],
pads.ports[pad_gnd_top],
cross_section=cross_section_metal,
bend=gf.components.wire_corner,
min_straight_length=min_straight_length,
**kwargs,
)
c.add(route_gnd_top.references)
route_sig_top = get_route(
m.ports[mzi_sig_top],
pads.ports[pad_sig_top],
cross_section=cross_section_metal,
bend=gf.components.wire_corner,
min_straight_length=min_straight_length,
**kwargs,
)
c.add(route_sig_top.references)
c.add_ports(m.ports)
return c
if __name__ == "__main__":
# mzi_ps_fa = gf.compose(gf.routing.add_fiber_array, mzi_pads_center)
# mzi_ps_fs = gf.compose(gf.routing.add_fiber_single, mzi_pads_center)
# c = mzi_ps_fs()
c = mzi_pads_center()
c.show(show_ports=True)
