Multi-channel lock-in based differential front-end for broadband Raman spectroscopy
Signal Processing
2019-06-27 v2
Abstract
In Broadband Stimulated Raman Spectroscopy, the intrinsic limit given by the laser shot noise is seldom reached due to the electronic noise of the front-end amplifier and the intensity fluctuations of the laser source. In this paper we present a low-noise multi-channel acquisition system, with an integration-oriented design, able to compensate the common-mode fluctuations of the laser output power with the pseudo-differential structure and reach a sensitivity better than 10 ppm thanks to the lock-in technique.
Keywords
Cite
@article{arxiv.1905.12467,
title = {Multi-channel lock-in based differential front-end for broadband Raman spectroscopy},
author = {A. Ragni and G. Sciortino and M. Sampietro and G. Ferrari and F. Crisafi and V. Kumar and G. Cerullo and D. Polli},
journal= {arXiv preprint arXiv:1905.12467},
year = {2019}
}
Comments
Post review version