Allan Deviation Plot as a Tool for Quartz-Enhanced Photoacoustic Sensors Noise Analysis

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 2016 Italy Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, volume 63, pages 555-560 (issn: 0885-3010, eissn: 1525-8955,

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Authors: Giglio, Marilena; Patimisco, Pietro; Sampaolo, Angelo; Scamarcio, Gaetano; Tittel, Frank K; SPAGNOLO, Vincenzo Luigi;

doi: 10.1109/tuffc.2015.2495013

pmid: 26529758

handle: 11589/56787 , 11586/187230

Allan Deviation Plot as a Tool for Quartz-Enhanced Photoacoustic Sensors Noise Analysis

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Abstract

We report here on the use of the Allan deviation plot to analyze the long-term stability of a quartz-enhanced photoacoustic (QEPAS) gas sensor. The Allan plot provides information about the optimum averaging time for the QEPAS signal and allows the prediction of its ultimate detection limit. The Allan deviation can also be used to determine the main sources of noise coming from the individual components of the sensor. Quartz tuning fork thermal noise dominates for integration times up to 275 s, whereas at longer averaging times, the main contribution to the sensor noise originates from laser power instabilities.

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Italy

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Keywords

laser noise, Models, Statistical, thermal noise, Gase, Terms-Gas detectors; laser noise; noise measurement; optical sensors; thermal noise, noise measurement, Quartz, Statistical, Acoustics and Ultrasonic, Photoacoustic Techniques, Gas detector, Models, Gases, Photoacoustic Technique, Electrical and Electronic Engineering, optical sensor, Instrumentation

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