Luxtelligence LNOI400

This python module implements the Luxtelligence LNOI400 PDK as components and technology specification for PhotonForge

For LNOI400 design rules, design manual and PDK specifications, please contact Luxtelligence.

Installation

Installation via pip:

pip install luxtelligence-lnoi400-forge

Usage

The simplest way to use the this PDK in PhotonForge is to set its technology as default:

import photonforge as pf
import luxtelligence_lnoi400_forge as lxt

tech = lxt.lnoi400()
pf.config.default_technology = tech

The lnoi400 function creates a parametric technology and accepts a number of parameters to fine-tune the technology.

PDK components are available in the component submodule. The list of components can be discovered by:

dir(lxt.component)

pdk_component = lxt.component.mmi1x2()

Utility functions cpw_spec and place_edge_couplers are also available for generating CPW port specifications and placing edge couplers at chip boudaries.

More information can be obtained in the documentation for each function:

help(lxt.lnoi400)

help(lxt.component.mmi1x2)

help(lxt.place_edge_couplers)

Finally, an extrusion demo for the technology can be seen by running:

lxt.plot_cross_section()

Warnings

Please note that the 3D structures obtained by extrusion through this module's technologies are a best approximation of the intended fabricated structures, but the actual final dimensions may differ due to several fabrication-specific effects. In particular, doping profiles are represented with hard-boundary, homogeneous solids, but, in practice will present process-dependent variations with smooth boundaries.

Changelog

1.4.0 - 2025-12-12

• Added eo_phase_shifter_high_speed and mz_modulator_unbalanced_high_speed.
• Added RF pads to eo_phase_shifter and corresponding terminals.
• Replace and deprecate the use of *_kwargs model parameters with model instances.
• Changed default values in accordance to 1.4.0 PDK release.
• Fixed missing terminal in straight heater.

1.2.4 - 2025-04-18

• Better error detection when inspecting port specifications

1.2.0 - 2025-03-04

• Added electrical ports and terminals.

1.1.0 - 2024-12-03

• Added arguments slab_removal_width and input_ext to double_linear_inverse_taper.
• Added arguments center and exclusion_zone_width to chip_frame.
• Added argument start_section_width to s_bend_vert.
• Added parametric components dir_coupl, heater_pad, heater_straight, and heated_straight_waveguide.
• chip_frame is centered around the origin by default.
• Changed mz_modulator_unbalanced default length.
• Removed port symmetries that were only valid for fundamental modes.

1.0.1 - 2024-10-17

• Add missing technology docstring.
• Fixed port symmetries in MMI2x2.