def mzi(length=1000, sep=50):
with nd.Cell(hashme=True) as mziBB:
eopm = eopm_dc(length=length, pads=True, sep=40)
mmi_left = mmi2x2_dp().put('lc')
deep.sbend(offset=sep).put(mmi_left.pin['b0'])
eopm_top = eopm.put()
deep.sbend(offset=-sep).put()
mmi_right = mmi2x2_dp().put()
deep.sbend(offset=-sep).put(mmi_left.pin['b1'])
eopm_bot = eopm.put(flip=True)
deep.sbend(offset=sep).put()
nd.Pin('a0', pin=mmi_left.pin['a0']).put()
nd.Pin('a1', pin=mmi_left.pin['a1']).put()
nd.Pin('b0', pin=mmi_right.pin['b0']).put()
nd.Pin('b1', pin=mmi_right.pin['b1']).put()
nd.Pin('c0', pin=eopm_top.pin['c0']).put()
nd.Pin('c1', pin=eopm_top.pin['c1']).put()
nd.Pin('d0', pin=eopm_bot.pin['c0']).put()
nd.Pin('d1', pin=eopm_bot.pin['c1']).put()
pdk.put_stub()
bb_length, y, a = nd.diff(mziBB.pin['a0'], mziBB.pin['b0'])
pdk.put_boundingbox('org', length=abs(bb_length), width=2*sep+428)
return mziBB
def abb_eopm_dc(length=750, contacts=2):
"""Create an electro-optic phase modulator cell.
Args:
length (float): length of the modulator section in um
Returns:
Cell: eopm element
"""
width = 60
with nd.Cell(hashme=True) as C:
nd.Pin(name='a0', xs='Deep', width=wdeep).put(0, 0, 180)
nd.Pin(name='b0', xs='Deep', width=wdeep).put(length, 0, 0)
# x-positions of pads:
L = 0.5*(length - wmetdc)
xpos = []
if contacts > 1:
for n in range(contacts):
xpos.append(0.5*wmetdc + L*2*n/(contacts-1))
elif contacts == 1:
xpos = [0.5*length]
elif contacts == 0:
pass
for n, x in enumerate(xpos):
pinname = 'c'+str(n)
p1 = nd.Pin(name=pinname, xs='MetalDC', width=wmetdc).put(x, 0, 90)
nd.put_stub(pinname)
#nd.Pin(name='c0', xs='MetalDC', width=wmetdc).put(0.5*length, 5.0, 90)
pdk.put_stub(['a0', 'b0', 'c0'])
pdk.put_boundingbox('org', length, width, align='lc')
icons.icon_strt(length, width, bufx=0, bufy=10, layer='MetalDCIcon').put('cc', 0, 'cc')
icons.icon_strt(length, width, bufx=10, bufy=-8, layer='DeepIcon').put('cc', 0, 'cc')
return C
def dbr_laser(Ldbr1=50, Ldbr2=500, Lsoa=750, Lpm=70):
"""Create a parametrized dbr laser building block."""
Liso = 20
with nd.Cell(hashme=True) as laser:
#create an isolation cell for reuse
iso = isolation_act(length=Liso)
#draw the laser
s2a1 = s2a().put(0)
iso.put()
dbr1 = dbr(length=Ldbr1).put()
iso.put()
soa1 = soa(length=Lsoa).put()
iso.put()
phase1 = phase_shifter(length=Lpm).put()
iso.put()
dbr2 = dbr(length=Ldbr2).put()
iso.put()
a2s1 = a2s().put()
# add pins to the laser building block
nd.Pin('a0', pin=s2a1.pin['a0']).put()
nd.Pin('b0', pin=a2s1.pin['b0']).put()
nd.Pin('c0', pin=dbr1.pin['c0']).put()
nd.Pin('c1', pin=soa1.pin['c0']).put()
nd.Pin('c2', pin=phase1.pin['c0']).put()
nd.Pin('c3', pin=dbr2.pin['c0']).put()
pdk.put_stub()
length, y, a = nd.diff(laser.pin['a0'], laser.pin['b0'])
pdk.put_boundingbox('org', length=abs(length), width=200, align='lb',
move=(0, -30, 0))
return laser
def isolation(length=length):
"""Create a p-isolation cell.
Args:
length (float): length of the isolation section in um
Returns:
Cell: isolation element
"""
bb_width = 20
with nd.Cell(hashme=True) as C:
nd.Pin(name='a0', xs=xs, width=width).put(0, 0, 180)
nd.Pin(name='b0', xs=xs, width=width).put(length, 0, 0)
pdk.put_stub()
pdk.put_boundingbox('org', length, bb_width)
icons.icon_strt(length, bb_width, bufx=4, bufy=-8, layer=layer).put('cc', 0, 'cc')
return C
def phase_shifter(length=100):
"""Create a current injection phase shifting cell.
Args:
length (float): length of phase section in um
Returns:
Cell: phase-shifter element
"""
width = 200
h = -70
with nd.Cell(hashme=True) as C:
nd.Pin(name='a0', xs='Active', width=wact).put(0, h, 180)
nd.Pin(name='b0', xs='Active', width=wact).put(length, h, 0)
nd.Pin(name='c0', xs='MetalDC', width=wmetdc).put(0.5*length, 5.0, 90)
pdk.put_stub(['a0', 'b0', 'c0'])
pdk.put_boundingbox('org', length, width, align='lc')
icons.icon_strt(length, width, bufx=0, bufy=10, layer='MetalDCIcon').put('cc', 0, 'cc')
icons.icon_strt(length, width, bufx=10, bufy=-8, layer='ActiveIcon').put('cc', 0, h, 'cc')
return C
def dbr(length=100, pitch=0.250, duty_cycle=0.5):
"""Create a DBR cell.
Args:
length (float): length of DBR section in um
pitch (float): pitch (full period) of dbr in um
duty_cycle (float): duty cycle of grating (default = 0.5)
Returns:
Cell: dbr element
"""
width = 200
h = -70
icon = icons.Tp_icon_grating('ActiveIcon')
with nd.Cell(hashme=True) as C:
nd.Pin(name='a0', xs='Active', width=wact).put(0, h, 180)
nd.Pin(name='b0', xs='Active', width=wact).put(length, h, 0)
nd.Pin(name='c0', xs='MetalDC', width=wmetdc).put(0.5*length, 5.0, 90)
pdk.put_stub(['a0', 'b0', 'c0'])
pdk.put_boundingbox('org', length, width, align='lc')
icons.icon_strt(length, width, bufx=0, bufy=10, layer='MetalDCIcon').put('cc', 0, 'cc')
icons.icon_strt(length, width, bufx=10, bufy=-8, layer='ActiveIcon').put('cc', 0, h, 'cc')
icon(length, width, bufx=5, bufy=-40).put('cc', 0, h, 'cc')
return C
def soa(length=100, pad=True):
"""Create a SOA cell.
Args:
length (float): length of gain section in um
Returns:
Cell: SOA element
"""
if pad:
width = 200
else:
width = 50
h = -70
with nd.Cell(hashme=True) as C:
nd.Pin(name='a0', xs='Active', width=wact).put(0, h, 180)
nd.Pin(name='b0', xs='Active', width=wact).put(length, h, 0)
nd.Pin(name='c0', xs='MetalDC', width=wmetdc).put(0.5*length, 5.0, 90)
pdk.put_stub(['a0', 'b0', 'c0'])
pdk.put_boundingbox('org', length, width, align='lc')
icons.icon_strt(length, width, bufx=0, bufy=10, layer='MetalDCIcon').put('cc', 0, 'cc')
icons.icon_strt(length, width, bufx=10, bufy=-8, layer='ActiveIcon').put('cc', 0, h, 'cc')
return C
#==============================================================================
with nd.Cell('awg1x4') as awg1x4:
awg = nd.load_gds(
filename= os.path.join(dir_path, 'gdsBB', 'AWG_1x4.gds'),
cellname='awg',
newcellname='demo_awg',
layermap={1:3})
awg.put()
nd.Pin('a0', xs='Deep', width=wdeep).put((9.184851e-016, -5, -90))
nd.Pin('b0', xs='Deep', width=wdeep).put((273.63575, -4.5798919, -85.569401))
nd.Pin('b1', xs='Deep', width=wdeep).put((269.89849, -4.9532407, -88.523134))
nd.Pin('b2', xs='Deep', width=wdeep).put((266.1423, -4.9532407, -91.476866))
nd.Pin('b3', xs='Deep', width=wdeep).put((262.40504, -4.5798919, -94.430599))
pdk.put_stub(['a0', 'b0', 'b1', 'b2', 'b3'])
#BBfunctioncalls.append('awg1x4')
BBcells = [eval(F) for F in BBfunctioncalls]
#==============================================================================
# Create groups to provide a structure to put building blocks (BB) under.
# This is optional, though useful in navigation BBs.
#==============================================================================
bb_connectors = pdk.Functional_group() #: inter-connectors
bb_transitions = pdk.Functional_group() #: xsection transistions
bb_splitters = pdk.Functional_group() #: power splitter and combiners
bb_combiners = pdk.Functional_group() #: power splitter and combiners
bb_amplifiers = pdk.Functional_group() #: SOAs
