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

• Published in: Integration (Amsterdam) Vol. 67; pp. 44 - 49
• Main Authors: Ragni, A., Sciortino, G., Sampietro, M., Ferrari, G., Polli, D.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2019; Elsevier BV
• Subjects: Amplifier; Broadband; Differential; Electric power; Laser; Lasers; Lock-in; Noise; Photodiode; Raman spectroscopy; Shot noise; Signal to noise ratio; Spectrum analysis; Transimpedance; Variations; Lock-in; Broadband; Differential; Noise; Transimpedance; Laser; Photodiode; Raman spectroscopy; Amplifier

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 in...