Low-dispersive phase-modulated rapid scanning interferometry
Abstract
Time-domain interferometry is an important principle in Fourier transform (FT) and nonlinear femto- to attosecond spectroscopy. To optimize the resolution and sensitivity of this approach, various interferometer stabilization schemes have been developed. Among them, acousto-optical phase modulation (AOPM) of the interferometer arms combined with phase-synchronous lock-in detection has proven as a particular sensitive technique. However, the acousto-optical modulators (AOMs), required for this technique, introduce several disadvantages. Here, we demonstrate an alternative phase modulation scheme which omits AOMs, termed PM scheme here. As a benchmark, we directly compare the performance between the PM and the AOPM scheme in a linear FT spectroscopy experiment and find comparable sensitivity in both approaches.
Cite
@article{arxiv.2502.17256,
title = {Low-dispersive phase-modulated rapid scanning interferometry},
author = {Fabian Richter and Ulrich Bangert and Friedemann Landmesser and Nicolai Gölz and Felix Riedel and Lukas Bruder},
journal= {arXiv preprint arXiv:2502.17256},
year = {2025}
}