Frequency domain interferometer simulation with higher-order spatial modes

TL;DR

This paper discusses FINESSE, a versatile frequency domain simulation software for modeling laser interferometers with higher-order spatial modes, aiding the design and analysis of gravitational-wave detectors.

Contribution

The paper introduces an advanced simulation tool, FINESSE, capable of analyzing optical properties of interferometers using Hermite-Gauss modes in the frequency domain, including higher-order modes.

Findings

FINESSE efficiently computes optical signals in interferometers.

It is the most advanced frequency domain optical simulation tool.

FINESSE supports analysis of complex optical setups with higher-order modes.

Abstract

FINESSE is a software simulation that allows to compute the optical properties of laser interferometers as they are used by the interferometric gravitational-wave detectors today. It provides a fast and versatile tool which has proven to be very useful during the design and the commissioning of gravitational-wave detectors. The basic algorithm of FINESSE numerically computes the light amplitudes inside an interferometer using Hermite-Gauss modes in the frequency domain. In addition, FINESSE provides a number of commands to easily generate and plot the most common signals like, for example, power enhancement, error or control signals, transfer functions and shot-noise-limited sensitivities. Among the various simulation tools available to the gravitational wave community today, FINESSE is the most advanced general optical simulation that uses the frequency domain. It has been designed to allow general analysis of user defined optical setups while being easy to install and easy to use.