Hadamard-transform high spectral resolution and broadband stimulated Raman Scattering microspectroscopy using an acousto-optic tunable filter

Abstract

Conventional stimulated Raman scattering (SRS) microscopes perform spectral acquisitions probing one single Raman shift (wavenumber) at a time. A multiplexed approach, however, would allow to perform faster spectral acquisitions, either measuring several wavenumbers in parallel or using reconstruction techniques that increase the signal to noise ratio (SNR). While the first approach often requires the use of complex technical solutions, the latter can be implemented with minor changes to an already existing broadband setup.