Share Email Print
cover

Proceedings Paper

Studies on sensitive Raman gas detectors
Author(s): Duluo Zuo; Yongyue Xu; Xinbing Wang; Youhui Xiong
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Recent studies on signal enhancement of spontaneous Raman scattering for developing of sensitive Raman gas detectors are reported. Raman scattering is a gas detecting method with high feasibility, but usually its signal is very low. To improve the level and the quality of the Raman signal, the effects of pumping laser source, sample cell, and optical arrangement are studied in detail. It is found that not only the wall of sample cell will give a wide Raman or fluorescence background which will decrease the sensitivity, but the dichroic beam splitter will also contribute considerable background if it is not aligned properly. The sample cell of hollow fiber is characterized by its high responsibility as well as its high background and low signal contrast. When the hollow fiber is replaced by a free-space sample cell consisted of metal-coated parabolic reflector, the wide background is largely suppressed. If there is no common optical elements between the pumping and collecting optical systems, the wide background will be cut down obviously, which is proved by the intracavity-enhanced Raman scattering in a He-Ne laser. These experimental results will be helpful for the research and developing of highly sensitive Raman gas detectors.

Paper Details

Date Published: 31 May 2013
PDF: 8 pages
Proc. SPIE 8718, Advanced Environmental, Chemical, and Biological Sensing Technologies X, 87180N (31 May 2013); doi: 10.1117/12.2016345
Show Author Affiliations
Duluo Zuo, Huazhong Univ. of Science and Technology (China)
Yongyue Xu, Huazhong Univ. of Science and Technology (China)
Xinbing Wang, Huazhong Univ. of Science and Technology (China)
Youhui Xiong, Wuhan Cubic Optoelectronics Co., Ltd. (China)


Published in SPIE Proceedings Vol. 8718:
Advanced Environmental, Chemical, and Biological Sensing Technologies X
Tuan Vo-Dinh; Robert A. Lieberman; Günter G. Gauglitz, Editor(s)

© SPIE. Terms of Use
Back to Top