S

simulation

SIS.jl — Stationary Interferometer Simulator, ported to Julia. A 2D-FFT-based optical field-propagation simulator for gravitational-wave interferometers, evolved from Hiro Yamamoto's MATLAB SIS and Richard Day's FOG. Provides idiomatic Julia implementations of grids, paraxial fields, optics, Fabry-Perot/recycling cavities, lock acquisition, and analysis tooling, with numerical parity to the MATLAB original pinned by golden-output regression tests. Built on FFTW.jl, DifferentialEquations.jl, and ControlSystems.jl. Requires Julia 1.10+. Upstream MATLAB: https://git.ligo.org/IFOsim/SIS.

Pedagogical Introduction to LIGO Interferometer analysis techniques that are useful for commissioning and noise hunting. e.g. optics, mechanics, electronics, control systems, noise

Repository for building RTS models into user-space libraries for simulation and test.

Re-optimization of IFO parameters for the Aundha (aka LIGO India) interferometer