Multi-channel lock-in based differential front-end for broadband Raman spectroscopy

被引：4
|
作者：
Ragni, A. [1 ]
Sciortino, G. [1 ]
Sampietro, M. [1 ]
Ferrari, G. [1 ]
Polli, D. [2 ]
机构：
[1] Politecn Milan, Dipartimento Elettron Informaz & Bioingn, Milan, Italy
[2] Politecn Milan, Dipartimento Fis, Milan, Italy
来源：
INTEGRATION-THE VLSI JOURNAL | 2019年 / 67卷
基金：
欧洲研究理事会;
关键词：
Raman spectroscopy; Broadband; Lock-in; Differential; Transimpedance; Amplifier; Photodiode; Laser; Noise; SCATTERING; SYSTEM;
D O I：
10.1016/j.vlsi.2019.03.001
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
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.
引用
收藏
页码：44 / 49
页数：6
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