def get_shapely_object(self):
splitter1 = Splitter(self.origin, self.angle, self.splitter_length, self.width, self.splitter_separation)
upper_wg = Waveguide.make_at_port(splitter1.left_branch_port)
upper_wg.add_bend(np.deg2rad(90), self.bend_radius)
upper_wg.add_straight_segment(self.upper_vertical_length)
upper_wg.add_bend(np.deg2rad(-90), self.bend_radius)
upper_wg.add_straight_segment(self.horizontal_length)
upper_wg.add_bend(np.deg2rad(-90), self.bend_radius)
upper_wg.add_straight_segment(self.upper_vertical_length)
upper_wg.add_bend(np.deg2rad(90), self.bend_radius)
lower_wg = Waveguide.make_at_port(splitter1.right_branch_port)
lower_wg.add_bend(np.deg2rad(-90), self.bend_radius)
lower_wg.add_straight_segment(self.lower_vertical_length)
lower_wg.add_bend(np.deg2rad(90), self.bend_radius)
lower_wg.add_straight_segment(self.horizontal_length)
lower_wg.add_bend(np.deg2rad(90), self.bend_radius)
lower_wg.add_straight_segment(self.lower_vertical_length)
lower_wg.add_bend(np.deg2rad(-90), self.bend_radius)
splitter2 = Splitter.make_at_right_branch_port(upper_wg.current_port, self.splitter_length,
self.splitter_separation)
return geometric_union([splitter1, splitter2, upper_wg, lower_wg])
def _example():
from gdshelpers.geometry.chip import Cell
from gdshelpers.parts.splitter import Splitter
from gdshelpers.parts.coupler import GratingCoupler
port = Port([0, 0], 0, 1)
path = Waveguide.make_at_port(port)
path.add_straight_segment(10)
path.add_bend(np.pi / 2, 10, final_width=0.5)
path.add_bend(-np.pi / 2, 10, final_width=1)
path.add_arc(np.pi * 3 / 4, 10, )
splitter = Splitter.make_at_root_port(path.current_port, 30, 10)
path2 = Waveguide.make_at_port(splitter.right_branch_port)
path2.add_bend(-np.pi / 4, 10)
n = 10
path2.add_parameterized_path(lambda t: (n * 10 * t, np.cos(n * 2 * np.pi * t) - 1),
path_derivative=lambda t: (n * 10, -n * 2 * np.pi * np.sin(n * 2 * np.pi * t)),
width=lambda t: np.cos(n * 2 * np.pi * t) * 0.2 + np.exp(-t) * 0.3 + 0.5,
width_function_supports_numpy=True)
path2.add_straight_segment(10, width=[.5, .5, .5])
print(path2.length)
print(path2.length_last_segment)
path2.add_cubic_bezier_path((0, 0), (5, 0), (10, 10), (5, 10))
path2.add_bend(-np.pi, 40)
coupler1 = GratingCoupler([100, 50], 0, 1, np.deg2rad(30), [10, 0.1, 2, 0.1, 2], start_radius_absolute=True)
path3 = Waveguide((0, -50), np.deg2rad(0), 1)
path3.add_bezier_to(coupler1.port.origin, coupler1.port.inverted_direction.angle, bend_strength=50)
splitter2 = Splitter.make_at_left_branch_port(splitter.left_branch_port, 30, 10, wavelength_root=2)
path4 = Waveguide.make_at_port(splitter2.root_port)
path4.add_straight_segment(20)
path4.width = 1
path4.add_straight_segment(20)
empty_path = Waveguide.make_at_port(path4.current_port)
whole_layout = (path, splitter, path2, splitter2, coupler1, path3, path4, empty_path)
layout = Cell('LIBRARY')
cell = Cell('TOP')
cell.add_to_layer(1, *whole_layout)
cell.add_to_layer(2, empty_path)
cell.add_to_layer(4, splitter.root_port.debug_shape)
layout.add_cell(cell)
cell_df = Cell('TOP_DF')
cell_df.add_to_layer(1, convert_to_positive_resist(whole_layout, buffer_radius=1.5))
layout.add_cell(cell_df)
layout.save('output.gds')
cell.show()
def test_splitter_same_wg_width(self):
total_length = 10
wg_width = 1
sep = 5
splitter = Splitter([0, 0], 0, total_length, wg_width, sep)
self.assertAlmostEqual(splitter.root_port.width, wg_width)
self.assertAlmostEqual(splitter.left_branch_port.width, wg_width)
self.assertAlmostEqual(splitter.left_branch_port.width, wg_width)
self.assertAlmostEqual(splitter.root_port.origin[0], 0)
self.assertAlmostEqual(splitter.root_port.origin[1], 0)