Highlights
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photonics
Start here — design a photonic circuit in one notebook
A working Mach–Zehnder interferometer built with the full stack in one notebook: gdsfactory draws the layout, sax simulates the S-parameters, and the GDS is ready for fabrication. Move the sliders and the layout and the spectrum update together.
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photonics
Ring resonator — the workhorse of integrated photonics
A waveguide loop side-coupled to a bus: on resonance light builds up in the ring and the bus transmission shows sharp notches. Sweep radius, coupling and loss to find critical coupling, with the layout in gdsfactory and the spectrum in sax.
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photonics
Directional coupler — the 2×2 building block
Two waveguides brought close together exchange power along the coupling region. The 2×2 element that splits and combines light inside every MZI and ring, laid out in gdsfactory and modelled as the same sax element the other notebooks use.
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photonics
The standard quantum limit of an optical neural network — verifying Hamerly et al. (PRX 2019)
A verification run of Hamerly et al., Phys. Rev. X 9, 021032 (2019): the shot-noise law of homodyne photoelectric multiplication checked by simulating the photon counting, every energy figure behind Fig. 3(c) and Tables S1-S2 recomputed, and (opt-in, about 3 min) the MNIST standard quantum limit of Fig. 2(c) re-measured on networks trained in the notebook. Sliders move detector capacitance, temperature, electronics energy and per-layer photon budgets off the paper's operating point.
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photonics
Silicon strip waveguides and the directional coupler — a verified mode-solver workflow
Effective index of the 500 × 220 nm silicon strip and the coupling length of a directional coupler, computed with femwell (FEM), MPB and MEEP FDTD and checked against the exact slab dispersion relation, a cross-solver extrapolation and an exact supermode beat length. Ends with a gdsfactory 3 dB coupler layout and a machine-readable validation table.
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photonics
Microring add-drop filters — from waveguide dispersion to a verified FDTD spectrum
Silicon microring resonators end to end: strip dispersion and group index (femwell, MPB), all-pass and add-drop transfer functions, FSR/Q/finesse and critical coupling, ring-bus coupling from supermodes and coupled-mode theory, a sax circuit model, and MEEP 2-D FDTD of an exactly solvable ring (Bessel-function reference) with Harminv and Lorentzian Q extraction, resolution convergence and a gdsfactory layout. Every number is checked in a machine-readable validation table.
All 22 notebooks in the gallery