def define_ports(self, prts):
prts += [OpticalPort(position = (-self.ring_radius, -self.ring_radius - self.coupler_spacing),
angle = 180.0, # outward pointing
wg_definition = self.bus_wg_def),
OpticalPort(position = (self.ring_radius, -self.ring_radius - self.coupler_spacing),
angle = 0.0, # outward pointing
wg_definition = self.bus_wg_def)
]
return prts
def define_taper(self):
start_wg_def = self.start_port.wg_definition.get_wg_definition_cross_section(
)
end_wg_def = self.end_wg_def.get_wg_definition_cross_section()
if start_wg_def.trench_width == 0.0:
new_start_wg_def = WgElDefinition(
wg_width=start_wg_def.shallow_wg_width,
trench_width=start_wg_def.shallow_trench_width,
process=start_wg_def.shallow_process)
new_start_port = OpticalPort(
position=self.start_port.position,
wg_definition=new_start_wg_def,
angle=self.start_port.angle)
taper = WgElPortTaperFromShallow(
start_port=new_start_port,
end_wg_def=end_wg_def,
length=self.length,
straight_extension=self.straight_extension,
shallow_process=start_wg_def.shallow_process)
else:
new_end_wg_def = WGFCWgElDefinition(
trench_width=end_wg_def.trench_width,
shallow_wg_width=end_wg_def.wg_width,
shallow_trench_width=start_wg_def.shallow_trench_width,
wg_width=end_wg_def.wg_width,
shallow_process=start_wg_def.shallow_process)
taper = WgElPortTaperLinear(
start_port=self.start_port,
end_wg_def=new_end_wg_def,
length=self.length,
straight_extension=self.straight_extension)
return taper
def define_taper(self):
start_wg_def = self.start_port.wg_definition.get_wg_definition_cross_section(
)
end_wg_def = self.end_wg_def.get_wg_definition_cross_section()
new_end_wg_def = WGFCWgElDefinition(
trench_width=end_wg_def.trench_width,
shallow_wg_width=end_wg_def.wg_width,
shallow_trench_width=0.5 *
(start_wg_def.thin_width - end_wg_def.wg_width),
wg_width=end_wg_def.wg_width,
shallow_process=start_wg_def.thin_process)
new_start_wg_def = WGFCWgElDefinition(
trench_width=start_wg_def.trench_width,
shallow_wg_width=TECH.TECH.MINIMUM_LINE,
shallow_trench_width=0.5 *
(start_wg_def.thin_width - TECH.TECH.MINIMUM_LINE),
wg_width=start_wg_def.wg_width,
shallow_process=start_wg_def.thin_process)
new_start_port = OpticalPort(position=self.start_port.position,
wg_definition=new_start_wg_def,
angle=self.start_port.angle)
taper = WgElPortTaperLinear(start_port=new_start_port,
end_wg_def=new_end_wg_def,
length=self.length,
straight_extension=self.straight_extension)
return taper
def __get_arm_content__(self, A):
# if no content in arm, create dummy
if A is None:
A = Structure(name="%s_BLANK" % (self.name),
elements=[],
ports=[
OpticalPort(position=(0.0, 0.0),
wg_definition=self.wg_definition,
angle_deg=180.0),
OpticalPort(position=(0.0, 0.0),
wg_definition=self.wg_definition,
angle_deg=0.0)
])
# if widths not identical,add tapers
if A.west_ports[0].wg_definition.wg_width == self.CPin[
1].wg_definition.wg_width and A.east_ports[
0].wg_definition.wg_width == self.CPout[
1].wg_definition.wg_width:
AC = A
else:
from picazzo.wg.taper_extended import WgElPortTaperExtended
if self.automatic_taper_west_length is None:
T1 = WgElPortTaperExtended(
start_port=A.west_ports[0],
end_wg_def=self.CPin[1].wg_definition)
else:
T1 = WgElPortTaperExtended(
start_port=A.west_ports[0],
end_wg_def=self.CPin[1].wg_definition,
length=self.automatic_taper_west_length)
if self.automatic_taper_east_length is None:
T2 = WgElPortTaperExtended(
start_port=A.east_ports[0],
end_wg_def=self.CPout[1].wg_definition)
else:
T2 = WgElPortTaperExtended(
start_port=A.east_ports[0],
end_wg_def=self.CPout[1].wg_definition,
length=self.automatic_taper_east_length)
AC = Structure(elements=[SRef(A, (0.0, 0.0)), T1, T2],
ports=[T1.west_ports[0], T2.east_ports[0]])
return AC