def cutback_phase(straight_length=100.0, bend_radius=10.0, n=2):
# Define sub components
bend180 = bend_circular(radius=bend_radius, start_angle=-90, theta=180)
pm_wg = phase_modulator_waveguide(length=straight_length)
wg_short = waveguide(length=1.0)
wg_short2 = waveguide(length=2.0)
wg_heater = waveguide_heater(length=10.0)
taper = _taper()
# Define a map between symbols and (component, input port, output port)
string_to_device_in_out_ports = {
"I": (taper, "1", "wg_2"),
"O": (taper, "wg_2", "1"),
"S": (wg_short, "W0", "E0"),
"P": (pm_wg, "W0", "E0"),
"A": (bend180, "W0", "W1"),
"B": (bend180, "W1", "W0"),
"H": (wg_heater, "W0", "E0"),
"-": (wg_short2, "W0", "E0"),
}
# Generate a sequence
# This is simply a chain of characters. Each of them represents a component
# with a given input and and a given output
repeated_sequence = "SIPOSASIPOSB"
heater_seq = "-H-H-H-H-"
sequence = repeated_sequence * n + "SIPO" + heater_seq
component = component_sequence(sequence, string_to_device_in_out_ports)
return component
def test_cutback_heater():
# Define subcomponents
bend_radius = 10.0
bend180 = bend_circular(radius=bend_radius, start_angle=-90, theta=180)
wg = waveguide(length=5.0)
wg_heater = waveguide_heater(length=20.0)
# Define a map between symbols and (component, input port, output port)
string_to_device_in_out_ports = {
"A": (bend180, "W0", "W1"),
"B": (bend180, "W1", "W0"),
"H": (wg_heater, "W0", "E0"),
"-": (wg, "W0", "E0"),
}
# Generate a sequence
# This is simply a chain of characters. Each of them represents a component
# with a given input and and a given output
sequence = "AB-H-H-H-H-BA"
component = component_sequence(sequence, string_to_device_in_out_ports)
assert component
return component