lightbeam

Simulate light through weakly guiding waveguides using the finite-differences beam propagation method on an adaptive grid.

This repository is derived from:

https://github.com/jw-lin/lightbeam.git

The original implementation was developed by Jonathan Lin at MIT.

Modifications are:

• Code generally neatened
• 19-core photonic lantern tutorial Lightbeam_19cpl_tutorial.ipynb added to tutorial
• 19-core photonic latnern example script lightbeam_19cpl_example.py added to tutorial
• Output field u weights returned from prop2end

installation

Use pip:

pip install git+https://github.com/SAIL-Labs/lightbeam.git

Update:

pip install --force-reinstall git+https://github.com/SAIL-Labs/lightbeam.git

Python dependencies: numpy,scipy,matplotlib,numba,numexpr,jupyter

getting started

Check out the Python notebook in the tutorial folder for a quickstart guide. Direct link.

references

J. Shibayama, K. Matsubara, M. Sekiguchi, J. Yamauchi and H. Nakano, "Efficient nonuniform schemes for paraxial and wide-angle finite-difference beam propagation methods," in Journal of Lightwave Technology, vol. 17, no. 4, pp. 677-683, April 1999, doi: 10.1109/50.754799.

The Beam-Propagation Method. (2015). In Beam Propagation Method for Design of Optical Waveguide Devices (pp. 22–70). doi:10.1002/9781119083405.ch2

acknowledgments

NSF grants 2109231, 2109232, 2308360, 2308361