案例分享：通过picazzo3库中的ExtendPorts函数实现器件的端口延伸
如：
所有代码如下：
from si_fab import all as pdk
from ipkiss3 import all as i3
from picazzo3.container.extend_ports import ExtendPorts
# Building the MMI PCell with properties that describe its geometry
class MMI2x2(i3.PCell):
"""MMI with 2 input and 2 outputs."""
_name_prefix = "MMI2x2"
trace_template = i3.TraceTemplateProperty(
doc="Trace template of the access waveguide"
)
width = i3.PositiveNumberProperty(default=4.0, doc="Width of the MMI section.")
length = i3.PositiveNumberProperty(default=20.0, doc="Length of the MMI secion.")
taper_width = i3.PositiveNumberProperty(default=1.0, doc="Width of the taper.")
taper_length = i3.PositiveNumberProperty(default=5.0, doc="Length of the taper")
waveguide_spacing = i3.PositiveNumberProperty(
default=2.0, doc="Spacing between the waveguides."
)
def _default_trace_template(self):
return pdk.SiWireWaveguideTemplate()
class Layout(i3.LayoutView):
def _generate_elements(self, elems):
length = self.length
width = self.width
taper_length = self.taper_length
taper_width = self.taper_width
half_waveguide_spacing = 0.5 * self.waveguide_spacing
core_layer = self.trace_template.core_layer
cladding_layer = self.trace_template.cladding_layer
core_width = self.trace_template.core_width
# Si core
elems += i3.Rectangle(
layer=core_layer,
center=(0.5 * length, 0.0),
box_size=(length, width),
)
elems += i3.Wedge(
layer=core_layer,
begin_coord=(-taper_length, -half_waveguide_spacing),
end_coord=(0.0, -half_waveguide_spacing),
begin_width=core_width,
end_width=taper_width,
)
elems += i3.Wedge(
layer=core_layer,
begin_coord=(-taper_length, half_waveguide_spacing),
end_coord=(0.0, half_waveguide_spacing),
begin_width=core_width,
end_width=taper_width,
)
elems += i3.Wedge(
layer=core_layer,
begin_coord=(length, half_waveguide_spacing),
end_coord=(length + taper_length, half_waveguide_spacing),
begin_width=taper_width,
end_width=core_width,
)
elems += i3.Wedge(
layer=core_layer,
begin_coord=(length, -half_waveguide_spacing),
end_coord=(length + taper_length, -half_waveguide_spacing),
begin_width=taper_width,
end_width=core_width,
)
# Cladding
elems += i3.Rectangle(
layer=cladding_layer,
center=(0.5 * length, 0.0),
box_size=(length + 2 * taper_length, width + 2.0),
)
return elems
def _generate_ports(self, ports):
length = self.length
taper_length = self.taper_length
trace_template = self.trace_template
half_waveguide_spacing = 0.5 * self.waveguide_spacing
ports += i3.OpticalPort(
name="in1",
position=(-taper_length, -half_waveguide_spacing),
angle=180.0,
trace_template=trace_template,
)
ports += i3.OpticalPort(
name="in2",
position=(-taper_length, half_waveguide_spacing),
angle=180.0,
trace_template=trace_template,
)
ports += i3.OpticalPort(
name="out1",
position=(length + taper_length, -half_waveguide_spacing),
angle=0.0,
trace_template=trace_template,
)
ports += i3.OpticalPort(
name="out2",
position=(length + taper_length, half_waveguide_spacing),
angle=0.0,
trace_template=trace_template,
)
return ports
if __name__ == "__main__":
port_labels = ["in1", "in2", "out1", "out2"]
my_container = ExtendPorts(
contents=MMI2x2(), port_labels=port_labels, auto_transition=True
)
layout = my_container.Layout(extension_length=10.0, area_layer_on=False)
layout.visualize()
通过：
port_labels = ["in1", "in2", "out1", "out2"]
可以选择需要延伸的端口，如;
port_labels = ["in2", "out1"]
