from __future__ import annotations
import gdsfactory as gf
from gdsfactory.cell import cell
from gdsfactory.component import Component, ComponentReference
from gdsfactory.components.grating_coupler_elliptical_trenches import grating_coupler_te
from gdsfactory.port import Port
from gdsfactory.routing.get_route import get_route
from gdsfactory.routing.manhattan import round_corners
from gdsfactory.typings import ComponentSpec, CrossSectionSpec
def connect_loopback(
port0: Port,
port1: Port,
a: float,
b: float,
y_bot_align_route: float,
cross_section: CrossSectionSpec = "xs_sc",
**kwargs,
) -> list[ComponentReference]:
"""Connects loopback structure.
Args:
port0: port.
port1: port.
a: radius.
b: radius.
y_bot_align_route: um.
cross_section: spec.
kwargs: cross_section settings.
"""
p0 = port0.center
p1 = port1.center
points = [
p0,
p0 + (0, a),
p0 + (b, a),
p0 + (b, y_bot_align_route),
p1 + (-b, y_bot_align_route),
p1 + (-b, a),
p1 + (0, a),
p1,
]
bend90 = gf.components.bend_euler(cross_section=cross_section, **kwargs)
return round_corners(
points=points,
bend=bend90,
straight=gf.components.straight,
cross_section=cross_section,
**kwargs,
).references
[docs]
@cell
def loss_deembedding_ch13_24(
pitch: float = 127.0,
grating_coupler: ComponentSpec = grating_coupler_te,
cross_section: CrossSectionSpec = "xs_sc",
port_name: str = "o1",
**kwargs,
) -> Component:
"""Grating coupler test structure for fiber array.
Connects channel 1->3, 2->4
Args:
pitch: um.
grating_coupler: spec.
cross_section: spec.
port_name: for the grating_coupler port.
kwargs: cross_section settings.
"""
gc = gf.get_component(grating_coupler)
c = gf.Component()
dx = pitch
gcs = [
gc.ref(position=(i * dx, 0), port_id=port_name, rotation=-90) for i in range(4)
]
gc_ports = [g.ports[port_name] for g in gcs]
c.add(gcs)
c.add(
get_route(
gc_ports[0],
gc_ports[2],
start_straight_length=40.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
x = gf.get_cross_section(cross_section, **kwargs)
radius = x.radius
gsi = gc.size_info
p1 = gc_ports[1]
p3 = gc_ports[3]
a = radius + 5.0 # 0.5
b = max(2 * a, pitch / 2)
y_bot_align_route = -gsi.width - 5.0
c.add(
connect_loopback(
p1, p3, a, b, y_bot_align_route, cross_section=cross_section, **kwargs
)
)
return c
[docs]
@cell
def loss_deembedding_ch12_34(
pitch: float = 127.0,
grating_coupler: ComponentSpec = grating_coupler_te,
port_name: str = "o1",
cross_section: CrossSectionSpec = "xs_sc",
**kwargs,
) -> Component:
"""Grating coupler test structure for fiber array.
Connects channel 1->2, 3->4
Args:
pitch: um.
grating_coupler: spec.
port_name: for the grating_coupler port.
cross_section: spec.
Keyword Args:
kwargs: cross_section settings.
"""
gc = gf.get_component(grating_coupler)
c = gf.Component()
dx = pitch
gcs = [
gc.ref(position=(i * dx, 0), port_id=port_name, rotation=-90) for i in range(4)
]
gc_ports = [g.ports[port_name] for g in gcs]
c.add(gcs)
c.add(
get_route(
gc_ports[0],
gc_ports[1],
start_straight_length=40.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
c.add(
get_route(
gc_ports[2],
gc_ports[3],
start_straight_length=40.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
return c
[docs]
@cell
def loss_deembedding_ch14_23(
pitch: float = 127.0,
grating_coupler: ComponentSpec = grating_coupler_te,
cross_section: CrossSectionSpec = "xs_sc",
port_name: str = "o1",
**kwargs,
) -> Component:
"""Grating coupler test structure for fiber array.
Connects channel 1->4, 2->3
Args:
pitch: um.
grating_coupler: spec.
cross_section: spec.
port_name: for the grating_coupler port.
Keyword Args:
kwargs: cross_section settings.
"""
gc = gf.get_component(grating_coupler)
c = gf.Component()
dx = pitch
gcs = [
gc.ref(position=(i * dx, 0), port_id=port_name, rotation=-90) for i in range(4)
]
gc_ports = [g.ports[port_name] for g in gcs]
c.add(gcs)
c.add(
get_route(
gc_ports[0],
gc_ports[3],
start_straight_length=40.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
c.add(
get_route(
gc_ports[1],
gc_ports[2],
start_straight_length=30.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
return c
[docs]
@cell
def grating_coupler_loss_fiber_array(
pitch: float = 127.0,
grating_coupler: ComponentSpec = grating_coupler_te,
port_name: str = "o1",
cross_section: CrossSectionSpec = "xs_sc",
**kwargs,
) -> Component:
"""Returns Grating coupler fiber array loopback.
Args:
pitch: spacing.
grating_coupler: spec for grating coupler.
port_name: for the grating_coupler port.
cross_section: spec.
Keyword Args:
kwargs: cross_section settings.
"""
gc = gf.get_component(grating_coupler)
c = gf.Component()
dx = pitch
gcs = [
gc.ref(position=(i * dx, 0), port_id=port_name, rotation=-90) for i in range(2)
]
gc_ports = [g.ports[port_name] for g in gcs]
c.add(gcs)
c.add(
get_route(
gc_ports[0],
gc_ports[1],
start_straight_length=40.0,
taper=None,
cross_section=cross_section,
**kwargs,
).references
)
return c
[docs]
@cell
def grating_coupler_loss_fiber_array4(
pitch: float = 127.0, grating_coupler: ComponentSpec = grating_coupler_te, **kwargs
) -> Component:
"""Returns a grating coupler test structure for fiber array.
Measures all combinations for a 4 fiber fiber_array
Connects channel 1->3, 2->4
Connects channel 1->4, 2->3
Connects channel 1->2, 3->4
Args:
pitch: grating_coupler_pitch.
grating_coupler: function.
kwargs: cross_section settings.
"""
c = gf.Component()
c1 = loss_deembedding_ch13_24(grating_coupler=grating_coupler, **kwargs)
c2 = loss_deembedding_ch14_23(grating_coupler=grating_coupler, **kwargs)
c3 = loss_deembedding_ch12_34(grating_coupler=grating_coupler, **kwargs)
c.add_ref(c1)
c2 = c.add_ref(c2)
c3 = c.add_ref(c3)
c2.movex(pitch * 4)
c3.movex(pitch * 8)
return c
if __name__ == "__main__":
# c = loss_deembedding_ch14_23()
# c = loss_deembedding_ch12_34()
# c = loss_deembedding_ch13_24()
# c = grating_coupler_loss_fiber_array4(layer=(2, 0), radius=30)
c = grating_coupler_loss_fiber_array4(cross_section="xs_rc")
# c = grating_coupler_loss_fiber_array(layer=(2, 0), radius=30)
c.show(show_ports=True)
