Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)

A novel, intensity-stabilized, fast-scanned, direct absorption spectroscopy (IS-FS-DAS) instrumentation, based on a distributed feedback (DFB) diode laser, is developed. A fiber-coupled polarization rotator and a fiber-coupled polarizer are used to stabilize the intensity of the laser, which signifi...

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Autores principales: Zhao, Gang, Tan, Wei, Jia, Mengyuan, Hou, Jiajuan, Ma, Weiguang, Dong, Lei, Zhang, Lei, Feng, Xiaoxia, Wu, Xuechun, Yin, Wangbao, Xiao, Liantuan, Axner, Ove, Jia, Suotang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5038816/
https://www.ncbi.nlm.nih.gov/pubmed/27657082
http://dx.doi.org/10.3390/s16091544
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author Zhao, Gang
Tan, Wei
Jia, Mengyuan
Hou, Jiajuan
Ma, Weiguang
Dong, Lei
Zhang, Lei
Feng, Xiaoxia
Wu, Xuechun
Yin, Wangbao
Xiao, Liantuan
Axner, Ove
Jia, Suotang
author_facet Zhao, Gang
Tan, Wei
Jia, Mengyuan
Hou, Jiajuan
Ma, Weiguang
Dong, Lei
Zhang, Lei
Feng, Xiaoxia
Wu, Xuechun
Yin, Wangbao
Xiao, Liantuan
Axner, Ove
Jia, Suotang
author_sort Zhao, Gang
collection PubMed
description A novel, intensity-stabilized, fast-scanned, direct absorption spectroscopy (IS-FS-DAS) instrumentation, based on a distributed feedback (DFB) diode laser, is developed. A fiber-coupled polarization rotator and a fiber-coupled polarizer are used to stabilize the intensity of the laser, which significantly reduces its relative intensity noise (RIN). The influence of white noise is reduced by fast scanning over the spectral feature (at 1 kHz), followed by averaging. By combining these two noise-reducing techniques, it is demonstrated that direct absorption spectroscopy (DAS) can be swiftly performed down to a limit of detection (LOD) (1σ) of 4 × 10(−6), which opens up a number of new applications.
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spelling pubmed-50388162016-09-29 Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6) Zhao, Gang Tan, Wei Jia, Mengyuan Hou, Jiajuan Ma, Weiguang Dong, Lei Zhang, Lei Feng, Xiaoxia Wu, Xuechun Yin, Wangbao Xiao, Liantuan Axner, Ove Jia, Suotang Sensors (Basel) Article A novel, intensity-stabilized, fast-scanned, direct absorption spectroscopy (IS-FS-DAS) instrumentation, based on a distributed feedback (DFB) diode laser, is developed. A fiber-coupled polarization rotator and a fiber-coupled polarizer are used to stabilize the intensity of the laser, which significantly reduces its relative intensity noise (RIN). The influence of white noise is reduced by fast scanning over the spectral feature (at 1 kHz), followed by averaging. By combining these two noise-reducing techniques, it is demonstrated that direct absorption spectroscopy (DAS) can be swiftly performed down to a limit of detection (LOD) (1σ) of 4 × 10(−6), which opens up a number of new applications. MDPI 2016-09-21 /pmc/articles/PMC5038816/ /pubmed/27657082 http://dx.doi.org/10.3390/s16091544 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Gang
Tan, Wei
Jia, Mengyuan
Hou, Jiajuan
Ma, Weiguang
Dong, Lei
Zhang, Lei
Feng, Xiaoxia
Wu, Xuechun
Yin, Wangbao
Xiao, Liantuan
Axner, Ove
Jia, Suotang
Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title_full Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title_fullStr Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title_full_unstemmed Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title_short Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10(−6)
title_sort intensity-stabilized fast-scanned direct absorption spectroscopy instrumentation based on a distributed feedback laser with detection sensitivity down to 4 × 10(−6)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5038816/
https://www.ncbi.nlm.nih.gov/pubmed/27657082
http://dx.doi.org/10.3390/s16091544
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