Increasing signal-to-noise ratio and retrieving signal in SNR

Bakhshian, M; Abbasi, H

doi:10.47176/ijpr.20.2.37731

Increasing signal-to-noise ratio and retrieving signal in SNR << 1 by using lock-in amplifier simulation in the LabVIEW software environment

Document Type : Research Note

Authors

M bakhshian

H Abbasi

Faculty of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran

https://doi.org/10.47176/ijpr.20.2.37731

Abstract

Detection of weak signals is one of the important issues in spectroscopy. The most important parameters of this field is the signal to noise ratio, which has a significant effect on the accuracy of the final data. In this regard, one of the most successful methods to increase the signal-to-noise ratio is to apply the intensity modulation method. In this method, first, the intensity of the initial signal is modulated, and after entering in the spectrometer, it is demodulated and amplified by a lock-in amplifier and eventually, the desired signal is recovered from various noises. The simulation allows the user to examine and optimize the related parameters for different initial conditions. The present article is dedicated to designing a lock-in amplifier by applying a LabVIEW graphical programming language

Keywords

spin-optoelectronic

transition metal dichalcogenide nanoribbons

quantum efficiency

full spin polarization

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