About

femto is an open-source package for the design of integrated optical circuits. The library consists of a growing list of parts and modules, which can be composed to construct complex optical components and large circuits. The optical components can be plotted and exported to a .pgm file for the fabrication of the circuit.

The following optical components are implemented:

• Multiscan and Nasu Waveguide class, allowing easy chaining of bends and straight segments. Including:

  • Circular and sinusoidal arcs

  • Directional couplers

  • Mach-Zehnder interferometers

  • Spline segments and 3D bridges

• Trench class, allowing easy generation of complex toolpaths for arbitrary geometries

• Marker and superficial ablation class

• Possibility to draw bitmap images

The G-Code file is generated by a dedicated compiler class that allows performing various geometric transformations on the optical components like:

• Translations

• Rotations

• Homothetic transformations, for refractive index change compensation

• Flip transformations along x- or y-axis

• Compensation for sample warp

The different structures can be organized into single cell-like objects, which allow:

• Collecting different structures of a circuit

• 2D and 3D representations of the stored objects

• Automatized generation of G-Code files

• Export plots in different formats