Year: 2025
Type: article
Abstract: The investigation of coherent phenomena in strong-field processes requires interferometric measurement schemes with high selectivity to disentangle the complex nonlinear response of the system. Interferometers combining acousto-optical phase modulation with lock-in detection feature excellent dynamic range and highly selective detection, thus providing a promising solution. However, acousto-optical modulators (AOMs) cause several issues when operated with intense, ultrashort, near-infrared (NIR) laser pulses. The AOMs introduce temporal and angular dispersion, self-phase modulation, and reduced acousto-optic efficiency at NIR wavelengths. Here, we present an acousto-optical phase modulation interferometer design that solves these issues. The presented solutions pave the way for the investigation of strong-field processes with phase-modulated interferometry and are also useful to improve the performance of phase-modulation interferometers in other applications.
Source: Review of Scientific Instruments
DOI: 10.1063/5.0290518
Authors: S. Ganeshamandiram, M. Niebuhr, F. Richter, U. Bangert, G. Sansone, F. Stienkemeier, L. Bruder
Institution: University of Freiburg
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4416914423