Next Article in Journal
Optimization of Stripping Voltammetric Sensor by a Back Propagation Artificial Neural Network for the Accurate Determination of Pb(II) in the Presence of Cd(II)
Previous Article in Journal
Collection and Processing of Data from Wrist Wearable Devices in Heterogeneous and Multiple-User Scenarios
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(9), 1544; doi:10.3390/s16091544

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

1
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
2
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
3
Department of Physics, Umeå University, Umeå SE-901 87, Sweden
4
Department of Electrical Engineering and Automation, Shanxi Polytechnic College, Taiyuan 030006, China
5
Shanxi Guohui Optoelectronic Technology CO., Ltd., Taiyuan 030006, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 17 August 2016 / Revised: 14 September 2016 / Accepted: 14 September 2016 / Published: 21 September 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1392 KB, uploaded 21 September 2016]   |  

Abstract

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. View Full-Text
Keywords: direct absorption spectroscopy; DFB laser; intensity stabilization; fast scanning; relative intensity noise; polarization rotator direct absorption spectroscopy; DFB laser; intensity stabilization; fast scanning; relative intensity noise; polarization rotator
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhao, G.; Tan, W.; Jia, M.; Hou, J.; Ma, W.; Dong, L.; Zhang, L.; Feng, X.; Wu, X.; Yin, W.; Xiao, L.; Axner, O.; Jia, S. Intensity-Stabilized Fast-Scanned Direct Absorption Spectroscopy Instrumentation Based on a Distributed Feedback Laser with Detection Sensitivity down to 4 × 10−6. Sensors 2016, 16, 1544.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top