def sweep_simulation(circuit,
iport="input",
oport="output",
start=1500e-9,
stop=1600e-9,
num=2000,
logscale=True,
**kwargs):
""" Plot Sparameter circuit transmission over wavelength
Args:
num: number of sampled points
"""
circuit = pp.call_if_func(circuit)
simulation = SweepSimulation(circuit, start, stop, num)
result = simulation.simulate()
f, s = result.data(iport, oport)
w = freq2wl(f) * 1e9
if logscale:
s = 20 * np.log10(abs(s))
ylabel = "|S| (dB)"
else:
ylabel = "|S|"
f, ax = plt.subplots()
ax.plot(w, s)
plt.xlabel("wavelength (nm)")
plt.ylabel(ylabel)
plt.title(circuit.name)
return ax
def mzi_simulation(**kwargs):
""" Run a simulation on the netlist """
circuit = mzi_circuit(**kwargs)
simulation = SweepSimulation(circuit, 1500e-9, 1600e-9)
result = simulation.simulate()
f, s = result.data("input", "output")
w = speed_of_light / f
plt.plot(w * 1e9, s)
plt.title("MZI")
plt.xlabel("wavelength (nm)")
plt.tight_layout()
plt.show()
def get_transmission(circuit,
iport="input",
oport="output",
start=1500e-9,
stop=1600e-9,
num=2000):
circuit = pp.call_if_func(circuit)
simulation = SweepSimulation(circuit, start, stop, num)
result = simulation.simulate()
f, s = result.data(iport, oport)
w = freq2wl(f) * 1e9
return dict(wavelength_nm=w, s=s)
def sweep_simulation(circuit,
iport="input",
oport="output",
start=1500e-9,
stop=1600e-9,
logscale=True,
**kwargs):
""" Run a simulation on the circuit
"""
circuit = pp.call_if_func(circuit)
simulation = SweepSimulation(circuit, start, stop)
result = simulation.simulate()
f, s = result.data(iport, oport)
w = freq2wl(f) * 1e9
if logscale:
s = 20 * np.log10(abs(s))
plt.plot(w, s)
plt.title(circuit.name)
plt.tight_layout()
plt.show()
def result_norm():
# Declare the models used in the circuit
gc = siepic.ebeam_gc_te1550()
y = siepic.ebeam_y_1550()
wg150 = siepic.ebeam_wg_integral_1550(length=150e-6)
wg50 = siepic.ebeam_wg_integral_1550(length=50e-6)
# Create the circuit, add all individual instances
circuit = Subcircuit("MZI")
e = circuit.add([
(gc, "input"),
(gc, "output"),
(y, "splitter"),
(y, "recombiner"),
(wg150, "wg_long"),
(wg50, "wg_short"),
])
# You can set pin names individually:
circuit.elements["input"].pins["n2"] = "input"
circuit.elements["output"].pins["n2"] = "output"
# Or you can rename all the pins simultaneously:
circuit.elements["splitter"].pins = ("in1", "out1", "out2")
circuit.elements["recombiner"].pins = ("out1", "in2", "in1")
# Circuits can be connected using the elements' string names:
circuit.connect_many([
("input", "n1", "splitter", "in1"),
("splitter", "out1", "wg_long", "n1"),
("splitter", "out2", "wg_short", "n1"),
("recombiner", "in1", "wg_long", "n2"),
("recombiner", "in2", "wg_short", "n2"),
("output", "n1", "recombiner", "out1"),
])
sim = SweepSimulation(circuit)
return sim.simulate()
circuit.add([(half_ring, 'input'), (half_ring, 'output'),
(term, 'terminator')])
circuit.elements['input'].pins = ('pass', 'midb', 'in', 'midt')
circuit.elements['output'].pins = ('out', 'midt', 'term', 'midb')
circuit.connect_many([('input', 'midb', 'output', 'midb'),
('input', 'midt', 'output', 'midt'),
('terminator', 'n1', 'output', 'term')])
return circuit
# Behold, we can run a simulation on a single ring resonator.
cir1 = ring_factory(10000)
sim1 = SweepSimulation(cir1, 1500e-9, 1600e-9)
res1 = sim1.simulate()
f1, s = res1.data(res1.pinlist['in'], res1.pinlist['pass'])
plt.plot(f1, s)
plt.title("10-micron Ring Resonator")
plt.tight_layout()
plt.show()
# Now, we'll create the circuit (using several ring resonator subcircuits)
# and add all individual instances.
circuit = Subcircuit('Add-Drop Filter')
e = circuit.add([(wg_data, 'input'), (ring_factory(10000), 'ring10'),
(wg_data, 'out1'), (wg_data, 'connect1'),
(ring_factory(11000), 'ring11'), (wg_data, 'out2'),
(wg_data, 'connect2'), (ring_factory(12000), 'ring12'),
def build_circuit(data, libraries):
"""
Parameters
----------
data : dict
The dictionary defining all the circuits and analyzers, as exported
by SiEPIC and parsed by the parser.
libraries : list or str
A string or list of strings of python module names containing the
model libraries for the components in the circuit.
Returns
-------
built : dict
A dictionary of constructed Python objects, with the following keys:
- `circuits`: dictionary of circuit names to their corresponding
instantiated Subcircuit objects.
- `subcircuits`: instantiated Subcircuit objects for all
subcircuits found in the spice data.
- `analyses`: instantiated Simulation objects for all network
analyzers found in the spice data.
"""
# Make sure `libraries` is a list
libraries = libraries if type(libraries) is list else [libraries]
# Create a dictionary from component names to their models
available_comps = get_components(libraries)
# Create all the defined subcircuits
# [`name`, `ports`, `components`, `params`]
subcircuits = {}
for sub in data['subcircuits']:
circuit = Subcircuit(sub['name'])
connections = {}
# Create all the components in the subcircuit and compile all the connections
# [`name`, `model`, `ports`, `params`]
for component in sub['components']:
# Add each component
kwargs = rearg(component['model'], component['params'])
circuit.add([(available_comps[component['model']](**kwargs),
component['name'])])
circuit.elements[component['name']].pins = tuple(
pin for pin in component['ports'])
# Track all it's nets
for port in component['ports']:
if port in connections:
connections[port].append(component['name'])
else:
connections[port] = [component['name']]
# Create all the connections between components
for port, comps in connections.items():
circuit.connect(comps[0], port, comps[1],
port) if len(comps) == 2 else None
subcircuits[sub['name']] = circuit
# Create circuits, since they're composed of subcircuits
# [`name`, `ports`, `subcircuits`, `params`]
circuits = {}
# TODO: What if one day a circuit contains more than one subcircuit?
for circ in data['circuits']:
subs = subcircuits[circ['subcircuits']]
if len(circ['ports']) != len(subs.pins):
raise ValueError(
'Ports on circuit do not match ports on subcircuit.')
circuits[circ['name']] = subs
# Create all the simulation objects
# [`definition`, `params`].
analyses = []
for analysis in data['analyses']:
# [`input_unit`, `input_parameter`]
if analysis['definition']['input_parameter'] == 'start_and_stop':
# [`minimum_loss`, `analysis_type`, `multithreading`,
# `number_of_threads`, `orthogonal_identifier`, `start`, `stop`,
# `number_of_points`, `input`, `output`]
circ, inp = analysis['params']['output'].split(',')
start = analysis['params']['start']
stop = analysis['params']['stop']
points = int(analysis['params']['number_of_points'])
mode = 'wl' if analysis['definition'][
'input_unit'] == 'wavelength' else 'freq'
sim = SweepSimulation(circuits[circ], start, stop, points, mode)
analyses.append(sim)
return {
'circuits': circuits,
'subcircuits': subcircuits,
'analyses': analyses
}
('wg_pass1', 'out', 'dc3', 'in1'),
('wg_out1', 'out', 'dc3', 'in2'),
('wg_out2', 'out', 'dc4', 'in1'),
('wg_pass2', 'out', 'dc4', 'in2'),
('dc3', 'out1', 'wg5', 'in'),
('dc3', 'out2', 'wg6', 'in'),
('dc4', 'out1', 'wg7', 'in'),
('dc4', 'out2', 'wg8', 'in'),
('wg5', 'out', 'out1', 'n1'),
('wg6', 'out', 'out2', 'n1'),
('wg7', 'out', 'out3', 'n1'),
('wg8', 'out', 'out4', 'n1'),
])
# Run a simulation on our circuit.
simulation = SweepSimulation(circuit, 1549.9e-9, 1550.1e-9)
# simulation = SweepSimulation(circuit, 1510e-9, 1590e-9)
result = simulation.simulate()
# Get the simulation results
# f, s = result.data(result.pinlist['in1'], result.pinlist['out1'])
# The Green Machine is optimized for 1550 nanometers. We'd like to investigate
# its behavior at that specific frequency:
set_freq = wl2freq(1550e-9)
in_port = 'in1'
plt.figure()
plt.plot(*result.data(result.pinlist[in_port], result.pinlist['out1']),
label='1 to 5')
plt.plot(*result.data(result.pinlist[in_port], result.pinlist['out2']),
('splitter', 'out1', 'wg_long', 'n1'),
('splitter', 'out2', 'wg_short', 'n1'),
('recombiner', 'in1', 'wg_long', 'n2'),
('recombiner', 'in2', 'wg_short', 'n2'),
('output', 'n1', 'recombiner', 'out1'),
])
# or by using the actual object reference.
# circuit.connect(e[0], e[0].pin[0], e[2], e[2].pin[0])
# At this point, your circuit is defined. This file can serve as a description
# for a subcircuit that is used in a larger circuit, and can simply be imported
# using the Python import system (``from mzi import circuit``).
# Run a simulation on the netlist.
simulation = SweepSimulation(circuit, 1500e-9, 1600e-9)
result = simulation.simulate()
f, s = result.data('input', 'output')
plt.plot(f, s)
plt.title("MZI")
plt.tight_layout()
plt.show()
# We can run a monte carlo simulation on the circuit, too
simulation = MonteCarloSweepSimulation(circuit, 1500e-9, 1600e-9)
runs = 10
result = simulation.simulate(runs=runs)
for i in range(1, runs + 1):
f, s = result.data('input', 'output', i)
plt.plot(f, s)
