Examples
Mach–Zehnder Interferometer
Build and export a 1x2 Mach-Zehnder interferometer.
The MZI example uses the default_1x2_mzi helper to assemble a splitter, two waveguide arms, S-bends, and a combiner. The resulting device exposes one input and two output ports.
Code
from pathlib import Path
import laylight
from laylight.render import export_layout_png, new_layout
from laylight.structure.mzi import default_1x2_mzi
layout, top, tech = new_layout("MZI_EXAMPLE")
device = default_1x2_mzi(layout=layout, tech=tech)
laylight.Placer(device).into(top)
output_dir = Path("build/examples")
output_dir.mkdir(parents=True, exist_ok=True)
layout.write(str(output_dir / "mzi.gds"))
export_layout_png(
layout,
output_dir / "mzi.png",
cell=top,
max_pixels=960,
)The code writes mzi.gds and mzi.png to build/examples.
Rendered layout
The two arms connect the input MMI to the output side. For a tunable version, construct MZI directly with heater_enable=True and configure the heater parameters.