def connect_lineShape(cell, pos_start, len):
path = gdspy.Path(w_wg, pos_start)
path.segment(len, **layer_FETCH_COR)
cell.add(path)
path = gdspy.Path(w_wg_cld, pos_start)
path.segment(len, **layer_FETCH_CLD)
cell.add(path)
def Heater(l_heater2):
# define heater
w_heater = 3
w_port = 10
w_wire = w_port * 2
cell = lib.new_cell('heater')
# add middle long rect
heater = gdspy.Rectangle((0, w_heater / 2), (l_heater2, -w_heater / 2),
**layer_heater)
cell.add(heater)
# add left rect and wire
heater = gdspy.Rectangle((-w_port / 2, w_port / 2),
(w_port / 2, -w_port / 2), **layer_heater)
cell.add(heater)
heater = gdspy.Rectangle((-w_wire / 2, w_wire / 2),
(w_wire / 2, -w_wire / 2), **layer_wire)
cell.add(heater)
# add right rect and wire
heater = gdspy.Rectangle((l_heater2 - w_port / 2, w_port / 2),
(l_heater2 + w_port / 2, -w_port / 2),
**layer_heater)
cell.add(heater)
heater = gdspy.Rectangle((l_heater2 - w_wire / 2, w_wire / 2),
(l_heater2 + w_wire / 2, -w_wire / 2),
**layer_wire)
cell.add(heater)
path1 = gdspy.Path(w_wg)
path1.segment(l_heater2)
path2 = gdspy.Path(w_wg_cld)
path2.segment(l_heater2)
cell.add(gdspy.boolean(path2, path1, 'xor', **layer_FETCH_COR))
return cell
def endgap(self):
gapwid = self.gapwid
tracewid = self.tracewid
if (self.x == self.paths[0].x) & (self.y == self.paths[0].y):
dirction = self.paths[0].direction
endctrpt = (self.paths[0].x, self.paths[0].y)
rightend = addtup(
addtup(
endctrpt,
scalartup(0.5 * gapwid, (numpy.cos(dirction + numpy.pi),
numpy.sin(dirction + numpy.pi)))),
scalartup(0.5 * (tracewid + 2 * gapwid),
(numpy.cos(dirction - numpy.pi / 2),
numpy.sin(dirction - numpy.pi / 2))))
endcap = gdspy.Path(gapwid, rightend)
endcap.segment(tracewid + 2 * gapwid, dirction + numpy.pi / 2)
self.paths.append(endcap)
else:
dirction = self.paths[0].direction
endctrpt = (self.paths[0].x, self.paths[0].y)
rightend = addtup(
addtup(
endctrpt,
scalartup(0.5 * gapwid,
(numpy.cos(dirction), numpy.sin(dirction)))),
scalartup(0.5 * (tracewid + 2 * gapwid),
(numpy.cos(dirction - numpy.pi / 2),
numpy.sin(dirction - numpy.pi / 2))))
endcap = gdspy.Path(gapwid, rightend)
endcap.segment(tracewid + 2 * gapwid, dirction + numpy.pi / 2)
self.paths.append(endcap)
def __init__(self,
leaddist,
leadlen,
leadwid,
squidheight,
layer=0,
datatype=1):
self.spec_side = {'layer': layer, 'datatype': datatype}
self.spec_mid = {'layer': layer + 1, 'datatype': datatype}
self.LeadDist = leaddist
self.LeadWid = leadwid
self.SquidHeight = squidheight
self.LeadLen = leadlen
midlead = gdspy.Path(leadwid, (0, 0))
midlead.segment(leadlen, -numpy.pi / 2, **(self.spec_mid))
midlead.segment(leadlen,
-numpy.pi / 2,
final_width=0,
**(self.spec_mid))
sideleads = gdspy.Path(leadwid, (0, -squidheight),
number_of_paths=2,
distance=leaddist)
sideleads.segment(leadlen, numpy.pi / 2, **(self.spec_side))
sideleads.segment(leadlen,
numpy.pi / 2,
final_width=0,
**(self.spec_side))
self.paths = [midlead, sideleads]
def __build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
# Add waveguide s-bend
wg = gdspy.Path(self.wgt.wg_width, (0, 0))
wg.parametric(
self.__sine_function,
tolerance=self.wgt.grid / 2.0,
max_points=199,
**self.wg_spec
)
self.add(wg)
# Add cladding s-bend
for i in range(len(self.wgt.waveguide_stack) - 1):
cur_width = self.wgt.waveguide_stack[i + 1][0]
cur_spec = {
"layer": self.wgt.waveguide_stack[i + 1][1][0],
"datatype": self.wgt.waveguide_stack[i + 1][1][1],
}
clad = gdspy.Path(cur_width, (0, 0))
clad.parametric(
self.__sine_function,
tolerance=self.wgt.grid / 2.0,
max_points=199,
**cur_spec
)
self.add(clad)
def DC(lib, cellName='DC', l_Coupler=20, spacing=0.6, radius_bend=10, l_ver=10, w_wg=0.5):
l_PortIn = 10
cell = lib.new_cell(cellName)
path_dc = gdspy.Path(w_wg, (0,0))
path_dc.segment(l_PortIn)
path_dc.turn(radius_bend,'r')
path_dc.segment(l_ver)
path_dc.turn(radius_bend,'l')
path_dc.segment(l_Coupler)
path_dc.turn(radius_bend,'l')
path_dc.segment(l_ver)
path_dc.turn(radius_bend,'r')
path_dc.segment(l_PortIn)
cell.add(path_dc)
path_dc = gdspy.Path(w_wg, (0, -(l_ver*2+radius_bend*4+spacing)))
path_dc.segment(l_PortIn)
path_dc.turn(radius_bend,'l')
path_dc.segment(l_ver)
path_dc.turn(radius_bend,'r')
path_dc.segment(l_Coupler)
path_dc.turn(radius_bend,'r')
path_dc.segment(l_ver)
path_dc.turn(radius_bend,'l')
path_dc.segment(l_PortIn)
cell.add(path_dc)
return cell
def __build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# then add it to the Cell
num_teeth = int(self.length // self.period)
""" Create a straight grating GratingCoupler
"""
gap = self.period - (self.period * self.dc)
path = gdspy.Path(self.wgt.wg_width, (0, 0))
path.segment(self.taper_length,
direction="+x",
final_width=self.width,
**self.wg_spec)
teeth = gdspy.L1Path((
gap + self.taper_length + 0.5 *
(num_teeth - 1 + self.dc) * self.period,
-0.5 * self.width,
), "+y", self.period * self.dc, [self.width], [], num_teeth,
self.period, **self.wg_spec)
clad_path = gdspy.Path(self.wgt.wg_width + 2 * self.wgt.clad_width,
(0, 0))
clad_path.segment(self.taper_length,
direction="+x",
final_width=self.width + 2 * self.wgt.clad_width,
**self.clad_spec)
clad_path.segment(self.length, direction="+x", **self.clad_spec)
self.add(teeth)
self.add(path)
self.add(clad_path)
def spiral(cell, w=0.5, pitch=2, r_min=10, r_max=40):
"""
cell: is the reference of cell \n
w is the width of waveguide \n
pitch is the min distance between two waveguides. \n
"""
path1 = gdspy.Path(w, (0, 0))
path2 = gdspy.Path(w, (0, 0))
path3 = gdspy.Path(w, (-r_min, 0))
a = r_min
k = r_max - r_min
N = k/pitch
def spiral1(u):
theta = N * numpy.pi * u
r = a + k*theta/( N * numpy.pi)
x = r * numpy.cos(theta)
y = r * numpy.sin(theta)
return (x, y)
def spiral2(u):
theta = (N+1) * numpy.pi * u
r = -( a + k*theta/( N * numpy.pi) )
x = r * numpy.cos(theta)
y = r * numpy.sin(theta)
return (x, y)
def dspiral_dt(u):
theta = N * numpy.pi * u
dx_dt = -numpy.sin(theta)
dy_dt = numpy.cos(theta)
# dx_dt = k*numpy.cos(theta) - (a + k*u)*N*numpy.pi*numpy.sin(theta)
# dy_dt = k*numpy.sin(theta) + (a + k*u)*N*numpy.pi*numpy.cos(theta)
return (dx_dt, dy_dt)
def dspiral_dt2(u):
theta = (N+1) * numpy.pi * u
dx_dt = -numpy.sin(theta)
dy_dt = numpy.cos(theta)
# dx_dt = k*numpy.cos(theta) - (a + k*u)*N*numpy.pi*numpy.sin(theta)
# dy_dt = k*numpy.sin(theta) + (a + k*u)*N*numpy.pi*numpy.cos(theta)
return (dx_dt, dy_dt)
# Add the parametric spiral to the path
path1.parametric(spiral1, dspiral_dt)
path2.parametric(spiral2, dspiral_dt2)
path3.turn(r_min/2, 'rr')
path3.turn(r_min/2, 'll')
path3.rotate(numpy.pi/2, (-r_min, 0))
cell.add(path1)
cell.add(path2)
cell.add(path3)
def build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# then add it to the Cell
num_teeth = int(self.length//self.period)
if self.focus_distance < self.width/2.0 - self.period:
raise ValueError("Warning! The focus_distance is smaller than the allowed value of width/2.0 - period.")
neff = self.wavelength / float(self.period) + self.sin_theta
qmin = int(self.focus_distance / float(self.period) + 0.5)
max_points = 199
c3 = neff**2 - self.sin_theta**2
w = 0.5 * self.width
path = gdspy.Path(self.wgt.clad_width, self.port, number_of_paths=2,
distance=self.wgt.wg_width + self.wgt.clad_width)
teeth = gdspy.Path(self.period * self.dc, self.port)
for q in range(qmin, qmin + num_teeth):
c1 = q * self.wavelength * self.sin_theta
c2 = (q * self.wavelength)**2
teeth.parametric(lambda t: (self.width * t - w, (c1 + neff
* np.sqrt(c2 - c3 * (self.width * t - w)**2)) / c3),
number_of_evaluations=self.evaluations,
max_points=max_points,
**self.wg_spec)
teeth.x = self.port[0]
teeth.y = self.port[1]
teeth.polygons[0] = np.vstack(
(teeth.polygons[0][:self.evaluations, :],
([(self.port[0] + 0.5 * self.wgt.wg_width, self.port[1]),
(self.port[0] - 0.5 * self.wgt.wg_width, self.port[1])])))
teeth.fracture()
clad_path = gdspy.Path(self.wgt.wg_width + 2*self.wgt.clad_width, self.port)
clad_path.segment(self.focus_distance, direction='+y',
final_width=self.width+2*self.wgt.clad_width, **self.clad_spec)
clad_path.segment(self.length, direction='+y', **self.clad_spec)
if self.direction=="WEST":
teeth.rotate(np.pi/2.0, self.port)
path.rotate(np.pi/2.0, self.port)
clad_path.rotate(np.pi/2.0, self.port)
if self.direction=="SOUTH":
teeth.rotate(np.pi, self.port)
path.rotate(np.pi, self.port)
clad_path.rotate(np.pi, self.port)
if self.direction=="EAST":
teeth.rotate(-np.pi/2.0, self.port)
path.rotate(-np.pi/2.0, self.port)
clad_path.rotate(-np.pi/2.0, self.port)
elif isinstance(self.direction, float):
teeth.rotate(self.direction - np.pi/2.0, self.port)
path.rotate(self.direction -np.pi/2.0, self.port)
clad_path.rotate(self.direction-np.pi/2.0, self.port)
self.add(teeth)
self.add(path)
self.add(clad_path)
def test_slice():
poly = gdspy.Path(1, (1, 0), 2, 3).segment(2, "-x")
left = gdspy.Path(1, (0, 0), 2, 3).segment(1, "-x")
right = gdspy.Path(1, (1, 0), 2, 3).segment(1, "-x")
result = gdspy.slice(poly, 0, 0)
assert equals(result[0], left)
assert equals(result[1], right)
bot = gdspy.Path(1, (1, -1.5)).segment(2, "-x")
top = gdspy.Path(1, (1, 1.5)).segment(2, "-x")
result = gdspy.slice(poly, [0.1, -0.1], 1)
assert equals(result[0], bot)
assert equals(result[2], top)
assert result[1] is None
def gc_line(cell, gc, origin=(0, 0), l=200):
cell.add(gdspy.CellReference(gc, origin))
cell.add(gdspy.CellReference(gc, (l + origin[0], origin[1]), rotation=180))
path_connect = gdspy.Path(w_wg)
path_connect.segment(l)
path_connect2 = gdspy.Path(w_wg + 6)
path_connect2.segment(l)
path_connect_positive = gdspy.boolean(path_connect,
path_connect2,
'xor',
layer=1,
datatype=1)
cell.add(path_connect_positive)
return cell
def connect_zShape(cell,
pos_start=(0, 0),
pos_end=(0, 0),
direction=1,
w=w_wg,
layer=1,
datatype=1):
'''
pos_end is relative to the pos_start
'''
path = gdspy.Path(w, pos_start)
path.segment(len_port_ext, layer=layer, datatype=datatype)
if direction == 1:
path.turn(radius, 'r', layer=layer, datatype=datatype)
else:
path.turn(radius, 'l', layer=layer, datatype=datatype)
path.segment(abs(pos_end[1] - pos_start[1]) - 2 * radius,
layer=layer,
datatype=datatype)
if direction == 1:
path.turn(radius, 'l', layer=layer, datatype=datatype)
else:
path.turn(radius, 'r', layer=layer, datatype=datatype)
path.segment(pos_end[0] - 2 * radius - len_port_ext,
layer=layer,
datatype=datatype)
# cell.add(path)
return path
def build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
angle = tk.get_angle(self.trace[0], self.trace[1])
# Add waveguide taper
path = gdspy.Path(self.wgt.wg_width, self.trace[0])
path.segment(tk.dist(self.trace[0], self.trace[1]),
direction=angle, final_width=self.end_width, **self.wg_spec)
# Cladding for waveguide taper
path2 = gdspy.Path(2*self.wgt.clad_width+self.wgt.wg_width, self.trace[0])
path2.segment(tk.dist(self.trace[0], self.trace[1]), direction=angle,
final_width=2*self.end_clad_width+self.end_width, **self.clad_spec)
path2.segment(self.extra_clad_length, **self.clad_spec)
self.add(path)
self.add(path2)
def dose_test(geometry, wf_size, biggest_feature=0.1):
""" generate a dose test for the given geometry
Args:
geometry: gdspy.PolygonSet
wf_size: target writefield size
biggest_feature: largest feature as a percentage of the writefield size
"""
smlfeats = []
for i, p in enumerate(geometry.polygons):
if p.shape[0] == 4: # only use rectangular features
X, Y = np.sort(p[:, 0]), np.sort(p[:, 1])
smlfeats += [np.abs(X[-1] - X[0]), np.abs(Y[-1] - Y[0])]
smallest_feature = np.min(smlfeats)
N_tests = round(1.0 / biggest_feature)
tests = []
for i in range(N_tests):
test_atom = gdspy.Path(width = wf_size*biggest_feature)\
.segment(0.1*wf_size, '+y')\
.translate(wf_size*biggest_feature/2, 0)\
.segment(0.3*wf_size, '+y', final_width = smallest_feature)\
.segment(0.1*wf_size, '+y')\
.translate(i*wf_size/N_tests, 0)
if i % 2:
tests.append(test_atom.mirror((1, 0)).translate(0, wf_size))
else:
tests.append(test_atom)
pattern = union(tests)
change_layer(pattern, 10)
return pattern
def test_gather():
def same_points(x, y):
for px, py in zip(x, y):
for ptx, pty in zip(px, py):
for cx, cy in zip(ptx, pty):
if cx != cy:
return False
return True
pts = [(0, 0), (1, 1), (1, 0)]
ps1 = gdspy.Round((10, 10), 1, inner_radius=0.2)
ps2 = gdspy.Path(0.1, (-1, -1), 2, 1).segment(2, "-x")
c = gdspy.Cell("C1").add(gdspy.Rectangle((-4, 3), (-5, 4)))
cr = gdspy.CellReference(c, (10, -10))
ca = gdspy.CellArray(c, 2, 1, (2, 0))
assert gdspy.operation._gather_polys(None) == []
assert same_points(gdspy.operation._gather_polys([pts]), [pts])
assert same_points(gdspy.operation._gather_polys(ps1), ps1.polygons)
assert same_points(gdspy.operation._gather_polys(ps2), ps2.polygons)
assert same_points(gdspy.operation._gather_polys(cr), cr.get_polygons())
assert same_points(gdspy.operation._gather_polys(ca), ca.get_polygons())
result = [pts]
result.extend(ps2.polygons)
result.extend(cr.get_polygons())
assert same_points(gdspy.operation._gather_polys([pts, ps2, cr]), result)
def build_DC(w, laayer=1, datatype=1):
path_dc = gdspy.Path(w, (0, 0))
path_dc.segment(l_PortIn)
path_dc.turn(radius_bend, 'r')
path_dc.segment(spacing_FA / 2 - gap / 2 - w_wg / 2 - 2 * radius_bend)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_DC)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_ver)
path_dc.turn(radius_bend, 'r')
path_dc.segment(l_heater)
path_dc.turn(radius_bend, 'r')
path_dc.segment(l_ver)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_DC)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_ver)
path_dc.turn(radius_bend, 'r')
path_dc.segment(l_heater)
path_dc.turn(radius_bend, 'r')
path_dc.segment(l_ver)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_DC)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_ver + spacing_wg)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_MZIs)
path_dc.turn(radius_bend, 'l')
path_dc.segment(l_ver + spacing_wg + gap / 2 + w_wg / 2 -
spacing_FA * 3 / 2)
path_dc.turn(radius_bend, 'r')
path_dc.segment(l_PortOut)
return path_dc
def gds(self, filename=None, view=False, extra=0, units='nms'):
#check to make sure the geometry isn't an array
if len(self.clean_args(None)[0]) != 1:
raise ValueError(
"You have changing geometries, making gds doesn't make sense")
if units == 'nms':
scale = 1
elif units == 'microns':
scale = 10**-3
else:
raise ValueError('Invalid units')
#scale to proper units
sc_radius = self.radius * scale
sc_gap = self.gap * scale
sc_width = self.width * scale
sc_length = self.length * scale
#write to GDS
pathTop = gdspy.Path(sc_width,
(sc_radius + sc_length / 2,
sc_radius + sc_width / 2 + sc_gap / 2 + extra))
pathTop.segment(extra, '-y')
pathTop.arc(sc_radius, 0, -np.pi / 2)
pathTop.segment(sc_length, '-x')
pathTop.arc(sc_radius, -np.pi / 2, -np.pi)
pathTop.segment(extra, '+y')
pathBottom = gdspy.Path(sc_width,
(-sc_radius - sc_width / 2 - sc_length / 2 -
extra, -sc_gap / 2 - sc_width / 2))
pathBottom.segment(
2 * (sc_radius + sc_width / 2) + sc_length + 2 * extra, '+x')
gdspy.current_library = gdspy.GdsLibrary()
path_cell = gdspy.Cell('C0')
path_cell.add(pathTop)
path_cell.add(pathBottom)
if view:
gdspy.LayoutViewer(cells='C0')
if filename is not None:
writer = gdspy.GdsWriter(filename, unit=1.0e-6, precision=1.0e-9)
writer.write_cell(path_cell)
writer.close()
def addlauncher(self, final_TraceWid, final_GapWid, final_Length,
tran_Length):
if (self.x == self.paths[0].x) & (self.y == self.paths[0].y):
dirction = self.paths[0].direction
self.addsegment(dirction + numpy.pi, tran_Length, final_TraceWid,
final_GapWid)
self.addsegment(dirction + numpy.pi, final_Length)
endctrpt = (self.paths[0].x, self.paths[0].y)
rightend = addtup(
addtup(
endctrpt,
scalartup(0.5 * final_GapWid,
(numpy.cos(dirction + numpy.pi),
numpy.sin(dirction + numpy.pi)))),
scalartup(0.5 * (final_TraceWid + 2 * final_GapWid),
(numpy.cos(dirction - numpy.pi / 2),
numpy.sin(dirction - numpy.pi / 2))))
pathlaunch = gdspy.Path(final_GapWid, rightend)
pathlaunch.segment(final_TraceWid + 2 * final_GapWid,
dirction + numpy.pi / 2)
self.paths[0].x = self.x
self.paths[0].y = self.y
self.paths[0].distance = self.tracewid + self.gapwid
self.paths[0].w = self.gapwid / 2
self.paths.append(pathlaunch)
else:
self.finalx = self.paths[0].x
self.finaly = self.paths[0].y
dirction = self.paths[0].direction
self.addsegment(dirction, tran_Length, final_TraceWid,
final_GapWid)
self.addsegment(dirction, final_Length)
endctrpt = (self.paths[0].x, self.paths[0].y)
rightend = addtup(
addtup(
endctrpt,
scalartup(0.5 * final_GapWid,
(numpy.cos(dirction), numpy.sin(dirction)))),
scalartup(0.5 * (final_TraceWid + 2 * final_GapWid),
(numpy.cos(dirction - numpy.pi / 2),
numpy.sin(dirction - numpy.pi / 2))))
pathlaunch = gdspy.Path(final_GapWid, rightend)
pathlaunch.segment(final_TraceWid + 2 * final_GapWid,
dirction + numpy.pi / 2)
self.paths[0].x = self.finalx
self.paths[0].y = self.finaly
self.paths.append(pathlaunch)
def build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
angle = tk.get_exact_angle(self.trace[0], self.trace[1])
angle_opp = tk.get_exact_angle(self.trace[1], self.trace[0])
# Add strip waveguide taper
path_strip = gdspy.Path(self.wgt_strip.wg_width, self.trace[0])
path_strip.segment(self.length,
final_width=self.end_strip_width,
direction=angle,
**self.wg_spec)
# Add slot waveguide taper
path_slot = gdspy.Path(self.wgt_slot.rail,
self.trace[1],
number_of_paths=2,
distance=self.wgt_slot.rail_dist)
path_slot.segment(self.length,
final_width=self.end_slot_width,
final_distance=(self.wgt_strip.wg_width +
2 * self.d + self.end_slot_width),
direction=angle_opp,
**self.wg_spec)
# Cladding for waveguide taper
path_clad = gdspy.Path(
2 * self.wgt_strip.clad_width + self.wgt_strip.wg_width,
self.trace[0])
path_clad.segment(self.length,
final_width=2 * self.wgt_slot.clad_width +
self.wgt_slot.wg_width,
direction=angle,
**self.clad_spec)
if not self.input_strip:
center_pt = ((self.trace[0][0] + self.trace[1][0]) / 2.0,
(self.trace[0][1] + self.trace[1][1]) / 2.0)
path_strip.rotate(np.pi, center_pt)
path_slot.rotate(np.pi, center_pt)
path_clad.rotate(np.pi, center_pt)
self.add(path_strip)
self.add(path_slot)
self.add(path_clad)
def addwires(self, wirewids, extralen=0):
squidheight = self.SquidHeight
midlead = gdspy.Path(wirewids[0],
(-self.LeadDist / 2 - extralen,
-2 * self.LeadLen + wirewids[0] / 2))
midlead.segment(self.LeadDist + extralen * 2, 0, **(self.spec_mid))
sidelead1 = gdspy.Path(
wirewids[1], (-self.LeadDist / 2, -squidheight + 1 * self.LeadLen))
sidelead1.segment(
self.SquidHeight - 4 * self.LeadLen + self.LeadLen + extralen,
numpy.pi / 2, **(self.spec_side))
sidelead2 = gdspy.Path(
wirewids[2], (self.LeadDist / 2, -squidheight + 1 * self.LeadLen))
sidelead2.segment(
self.SquidHeight - 4 * self.LeadLen + self.LeadLen + extralen,
numpy.pi / 2, **(self.spec_side))
self.paths = self.paths + [midlead, sidelead1, sidelead2]
def create_cavity(x,y,width,separation_of_first,width_of_first): length=(width_of_first*separation_of_first)/width cavity_pair.add(gdspy.Rectangle((-Op_Cav_Width/2+x,-Op_Cav_Len/2+y),(Op_Cav_Width/2+x,Op_Cav_Len/2+y),**spec1)) ynew=length+Pill_Cav_Len/2+Op_Cav_Len/2 cavity_pair.add(gdspy.Rectangle((-Op_Cav_Width/2+x,-Op_Cav_Len/2+y+ynew),(Op_Cav_Width/2+x,Op_Cav_Len/2+y+ynew),**spec1)) path1=gdspy.Path(width,(x,y+Op_Cav_Len/2)) path1.segment(length,'+y',**spec1) cavity_pair.add(path1)
def __init__(self, w, d):
# w is the width of center conductor, d is the width of gap
self.w = w
self.d = d
self.D = d + w
self.path1 = gs.Path(d, (0, 0), number_of_paths=2, distance=self.D)
# self.path2=gs.Path(d)
self.length = 0
def gc_line(cell, gc, origin=(0,0), l=200, w_wg=0.5, w_etch=3):
"""
cell: cell in Gdspy \n
w_gc: width of grating coupler \n
w_wg: width of waveguide\n
w_etch: width of etch
"""
cell.add(gdspy.CellReference(gc, origin))
cell.add(gdspy.CellReference(gc, (l+origin[0], origin[1]), rotation=180))
path_connect = gdspy.Path(w_wg)
path_connect.segment(l)
path_connect2 = gdspy.Path(w_wg+w_etch*2)
path_connect2.segment(l)
path_connect_positive = gdspy.boolean(path_connect, path_connect2,'xor',layer=1, datatype=1)
cell.add(path_connect_positive)
return cell
def RouteStraight(p1, p2, layer, path_type='straight', width_type='straight'):
""" Routes a straight polygon between two ports.
Example
-------
>>> R = RouteStraight()
"""
point_a = p1.midpoint
point_b = p2.midpoint
width_input = p1.width
width_output = p2.width
if ug.angle_diff(p2.orientation, p1.orientation) != 180:
raise ValueError('Ports do not face eachother.')
separation = np.array([point_b[0], point_b[1]]) - np.array(
[point_a[0], point_a[1]])
distance = norm(separation)
rotation = np.arctan2(separation[1], separation[0]) * constants.RAD2DEG
angle = rotation - p1.orientation
xf = distance * np.cos(angle * constants.DEG2RAD)
yf = distance * np.sin(angle * constants.DEG2RAD)
if path_type == 'straight':
curve_fun = lambda t: [xf * t, yf * t]
curve_deriv_fun = lambda t: [xf + t * 0, 0 + t * 0]
if path_type == 'sine':
curve_fun = lambda t: [xf * t, yf * (1 - np.cos(t * np.pi)) / 2]
curve_deriv_fun = lambda t: [
xf + t * 0, yf * (np.sin(t * np.pi) * np.pi) / 2
]
if width_type == 'straight':
width_fun = lambda t: (width_output - width_input) * t + width_input
if width_type == 'sine':
width_fun = lambda t: (width_output - width_input) * (1 - np.cos(
t * np.pi)) / 2 + width_input
route_path = gdspy.Path(width=width_input, initial_point=(0, 0))
route_path.parametric(curve_fun, curve_deriv_fun, final_width=width_fun)
port1 = Port(name='I1',
midpoint=(0, 0),
width=width_input,
orientation=180,
process=layer.process)
port2 = Port(name='I2',
midpoint=(xf, yf),
width=width_output,
orientation=0,
process=layer.process)
route_shape = RouteShape(path=route_path)
R = Route(shape=route_shape, p1=port1, p2=port2, layer=layer)
T = vector_match_transform(v1=R.ports[0], v2=p1)
R.transform(T)
return R
def build_cell(self):
#Sequentially build all the geometric shapes using gdspy path functions
#then add it to the Cell
num_teeth = int(self.length // self.period)
""" Create a straight grating GratingCoupler
"""
gap = self.period - (self.period * self.dc)
path = gdspy.Path(self.wgt.wg_width, self.port)
path.segment(self.taper_length,
direction='+y',
final_width=self.width,
**self.wg_spec)
teeth = gdspy.L1Path(
(self.port[0] - 0.5 * self.width, gap + self.taper_length +
self.port[1] + 0.5 * (num_teeth - 1 + self.dc) * self.period),
'+x', self.period * self.dc, [self.width], [], num_teeth,
self.period, **self.wg_spec)
clad_path = gdspy.Path(self.wgt.wg_width + 2 * self.wgt.clad_width,
self.port)
clad_path.segment(self.taper_length,
direction='+y',
final_width=self.width + 2 * self.wgt.clad_width,
**self.clad_spec)
clad_path.segment(self.length, direction='+y', **self.clad_spec)
if self.direction == "WEST":
teeth.rotate(np.pi / 2.0, self.port)
path.rotate(np.pi / 2.0, self.port)
clad_path.rotate(np.pi / 2.0, self.port)
elif self.direction == "SOUTH":
teeth.rotate(np.pi, self.port)
path.rotate(np.pi, self.port)
clad_path.rotate(np.pi, self.port)
elif self.direction == "EAST":
teeth.rotate(-np.pi / 2.0, self.port)
path.rotate(-np.pi / 2.0, self.port)
clad_path.rotate(-np.pi / 2.0, self.port)
elif isinstance(self.direction, float):
teeth.rotate(self.direction - np.pi / 2.0, self.port)
path.rotate(self.direction - np.pi / 2.0, self.port)
clad_path.rotate(self.direction - np.pi / 2.0, self.port)
self.add(teeth)
self.add(path)
self.add(clad_path)
def bc(w_wg=0.5, l_bc=100, w_bc=127 / 2, tolerance=0.01):
''' w_wg is the width of waveguide \n
l_bc is length of bezier curve \n
w_bc is the width of bezier curve'''
path = gdspy.Path(w_wg, (0, 0))
v = [(l_bc / 2, 0), (l_bc / 2, w_bc),
(l_bc, w_bc)] # the first point (0, 0) is omiited
path.bezier(v, tolerance=tolerance)
return path
def __init__(self, ct, ch, fillet=0, layer=0, datatype=0):
self.spec = {'layer': layer, 'datatype': datatype}
Harm = gdspy.Path(ct, (-ch / 2, 0))
Harm.segment(ch, 0, **(self.spec))
Varm = gdspy.Path(ct, (0, -ch / 2))
Varm.segment(ch, numpy.pi / 2, **(self.spec))
self.paths = [Harm, Varm]
if (fillet != 0):
filletwid = fillet * numpy.sqrt(2)
filletlen = filletwid / 2 + fillet
for psign in [-1, 1]:
for qsign in [-1, 1]:
for len1 in [ct / 2, ch / 2]:
for len2 in [ct / 2, ch / 2]:
pt = (psign * len1, qsign * len2)
if (len1 == ch / 2) & (len2 == ch / 2):
continue
elif (len1 == ct / 2) & (len2 == ct / 2):
direction = (-psign / numpy.sqrt(2),
-qsign / numpy.sqrt(2))
p = gdspy.Path(
filletwid,
(pt[0] - direction[0] * filletwid / 2,
pt[1] - direction[1] * filletwid / 2))
#p=gdspy.Path(filletwid,pt)
p.segment(filletlen,
numpy.arctan2(
direction[1], direction[0]),
final_width=0)
self.paths.append(p)
else:
direction = (psign / numpy.sqrt(2),
qsign / numpy.sqrt(2))
p = gdspy.Path(
filletwid,
(pt[0] - direction[0] * filletwid / 2,
pt[1] - direction[1] * filletwid / 2))
#p=gdspy.Path(filletwid,pt)
p.segment(filletlen,
numpy.arctan2(
direction[1], direction[0]),
final_width=0)
self.paths.append(p)
def __build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
# Uncomment below to plot the function (useful for debugging)
# import matplotlib.pyplot as plt
# tvals = np.linspace(0,1,5000)
# xy = [self.__euler_s_function(tv) for tv in tvals]
# plt.scatter(*zip(*xy))
# plt.show()
if self.wgt.wg_type == "strip":
wg = gdspy.Path(self.start_width, (0, 0))
elif self.wgt.wg_type == "slot":
wg = gdspy.Path(
self.wgt.rail, (0, 0), number_of_paths=2, distance=self.wgt.rail_dist
)
wg.parametric(
self.__euler_s_function,
final_width=self.end_width,
tolerance=self.wgt.grid / 2.0,
max_points=199,
**self.wg_spec
)
self.add(wg)
# Add cladding
for i in range(len(self.wgt.waveguide_stack) - 1):
cur_width = self.wgt.waveguide_stack[i + 1][0]
cur_spec = {
"layer": self.wgt.waveguide_stack[i + 1][1][0],
"datatype": self.wgt.waveguide_stack[i + 1][1][1],
}
clad = gdspy.Path(cur_width, (0, 0))
clad.parametric(
self.__euler_s_function,
tolerance=self.wgt.grid / 2.0,
max_points=199,
**cur_spec
)
self.add(clad)
def __build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
# Add strip waveguide taper
path_strip = gdspy.Path(self.wgt_strip.wg_width, (0, 0))
path_strip.segment(self.length,
final_width=self.end_strip_width,
direction=0,
**self.wg_spec)
# Add slot waveguide taper
path_slot = gdspy.Path(
self.wgt_slot.rail,
(self.length, 0),
number_of_paths=2,
distance=self.wgt_slot.rail_dist,
)
path_slot.segment(self.length,
final_width=self.end_slot_width,
final_distance=(self.wgt_strip.wg_width +
2 * self.d + self.end_slot_width),
direction=np.pi,
**self.wg_spec)
# Cladding for waveguide taper
path_clad = gdspy.Path(
2 * self.wgt_strip.clad_width + self.wgt_strip.wg_width, (0, 0))
path_clad.segment(self.length,
final_width=2 * self.wgt_slot.clad_width +
self.wgt_slot.wg_width,
direction=0,
**self.clad_spec)
if not self.input_strip:
center_pt = (self.length / 2.0, 0)
path_strip.rotate(np.pi, center_pt)
path_slot.rotate(np.pi, center_pt)
path_clad.rotate(np.pi, center_pt)
self.add(path_strip)
self.add(path_slot)
self.add(path_clad)
def start(self, start = [0, 0], direction = None):
### Start a CPW path specified by start coordinates and a direction
### direction: {+x, -x, +y, -y} or angle (in radians)
if direction is not None:
# Get direction from CPW class
self.initalDirection = direction
# Define the distance
d = self.width + self.gap
self.path = gdspy.Path(self.gap,(start[0],start[1]),number_of_paths = 2,
distance=d)
