Abstract
In the field of near infrared H2O sensing, the acquisition of the absorption signal usually is from a noisy background, thus it is important to adopt an effective signal demodulation method. This study introduced the research progress in the field of trace water vapor detection, covering different individual gas detection techniques. On the basis of the conventional double-beam differential absorption, the division method in voltage and the dual-peak method based on the differential value of two adjacent absorption lines have been studied. Voltage division has an excellent stability to temperature variation, mechanical extrusion, and fiber bend loss. The dual-peak method proved a linear relation with the water vapor concentration, and this method provided a way to measure the concentration at high pressure. Furthermore, the so called balanced ratiometer detection (BRD) was introduced. It has an outstanding self-adjusting capability, and it can also avoid an excess phase difference caused by the current-to-voltage converting circuit, thus this method has a high sensitivity. In addition, the second harmonic technique applied to gas detection was introduced, and for the high-frequency modulation via driving current, 1/f was suppressed apparently; as a result, this technique realized a better sensitive detection by one to two orders of magnitude.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
K. Song, S. Oh, E. C. Jung, D. Kim, and H. Cha, “Application of laser photoacoustic spectroscopy for the detection of water vapor near 1.38 μm,” Microchemical Journal, 2005, 80(2): 113–119.
R. Fenner and E. Zdankiewicz, “Micromachined water vapor sensors: a review of sensing technologies,” IEEE Sensors Journal, 2001, 1(4): 309–317.
P. Werle, “A review of recent advances in semiconductor laser-based gas monitors,” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1998, 54(2): 197–236.
Q. Wang, J. Chang, C. G. Zhu, C. Li, F. J. Song, Y. N. Liu, et al., “Detection of water vapor concentration based on differential value of two adjacent absorption peaks,” Laser Physics Letters, 2012, 9(6): 421–425.
Y. Zhang, J. Chang, Q. Wang, S. Zhang, and F. Song, “The theoretical and experimental exploration of a novel water vapor concentration measurement scheme based on scanning spectrometry,” in 2011 International Conference on Electronics and Optoelectronics, Dalian, China, vol. 4, pp. 315–319, 2011.
S. Zhang, Q. Wang, Y. Zhang, F. Song, K. Chen, G. Chou, et al., “Water vapor detection system based on scanning spectra,” Photonic Sensors, 2012, 2(1): 71–76.
G. Stewart, A. Mencaglia, W. Philp, and W. Jin, “Interferometric signals in fiber optic methane sensors with wavelength modulation of the DFB laser source,” Journal of Lightwave Technology, 1998, 16(1): 43–53.
Q. Wang, J. Chang, C. Zhu, Y Liu, G. Lv, F. Wang, et al., “High-sensitive measurement of water vapor: shot-noise level performance via a noise canceller,” Appllied Optics, 2013, 52(5): 1094–1099.
P. C. D. Hobbs, “Shot noise limited optical measurements at baseband with noisy lasers,” in Proc. SPIE, vol. 1376, pp. 216–221, 1991.
Q. Wang, J. Chang, F. Song, F. Wang, C. Zhu, Z. Liu, et al., “Measurement and analysis of water vapor inside optical components for optical fiber H2O sensing system,” Appllied Optics, 2013, 52(26): 6445–6451.
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is published with open access at Springerlink.com
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Lv, G., Chang, J., Wang, Q. et al. Research progress of optical H2O sensor with a DFB diode laser. Photonic Sens 4, 113–119 (2014). https://doi.org/10.1007/s13320-014-0151-x
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13320-014-0151-x