A compact underwater Raman spectroscopy system with high sensitivity

被引：2

作者：

Liu Q.-X. ^{[1
]}

Guo J.-J. ^{[1
]}

Yang D.-W. ^{[1
]}

Si G.-S. ^{[1
]}

Zheng R. ^{[1
]}

机构：

[1] Ocean University of China, Optics and Optoelectronics Laboratory, Qingdao

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2018年 / 26卷 / 01期

关键词：

Compact; High sensitivity; Raman spectroscopy; Underwater in-situ detection;

D O I：

10.3788/OPE.20182601.0008

中图分类号：

学科分类号：

摘要：

In order to reduce the volume and weight of the underwater Raman system, and to improve its portability and detection sensitivity, a compact underwater Raman spectroscopy system with high sensitivity was developed and assessed. Through elaborate selection of components, a compact structural design was realized with both the weight and the volume well controlled. The size of the main body was kept at 795 mm in length and 260 mm in diameter, with a weight of 548 N, one third of the weight of reported DORISS (the first deep ocean Raman in-situ spectroscopy system). The laser was housed in the optical probe rather than in the main body, hence higher excitation efficiency was achieved with high power density. There are two advantages to put the laser head in the probe. A desirable excitation power density could be obtained without the consumption of laser beam during transmission in fiber, and better signal to noise ratio could be achieved without the stray light raised by the interaction of laser and optical fiber. In addition, 300 mW powered laser, efficient volume phase holographic grating and TEC cooled CCD detector were used to improve the system performance. The experimental results show that the LOD (limit of detection) of SO42- was less than 0.4 mmol·L-1. It's about four times than the value achieved by DORISS. Meanwhile the system can be used to identify minerals. All above prove the system to be highly potential in ocean exploration. © 2018, Science Press. All right reserved.

引用

页码：8 / 13

页数：5

共 19 条

[1] Liu Y.D., Xie Q.H., Wang H.Y., Et al., Comparative study on camellia oil & olive oil quality and quantitative analysis of adulteration, Opt. Precision Eng., 24, 10, pp. 600-606, (2016)
[2] Liu Y.D., Jin T.T., Wang H.Y., Rapid quantitative determination of components in ternary blended edible oil based on Raman spectroscopy, Opt. Precision Eng., 23, 9, pp. 2490-2496, (2015)
[3] Wu B., Luo X.S., Lu J., Et al., Determination of ethanol concentration of aqueous solution by using Raman stretching frequency shifts, Opt. Precision Eng., 19, 2, pp. 392-396, (2011)
[4] Brewer P.G., Malby G., Pasteris J.D., Et al., Development of a laser Raman spectrometer for deep-ocean science, Deep Sea Research Part I: Oceanographic Research Papers, 51, 5, pp. 739-753, (2004)
[5] Hester K.C., Dunk R.M., White S.N., Et al., Gas hydrate measurements at Hydrate Ridge using Raman spectroscopy, Geochimica et Cosmochimica Acta, 71, 12, pp. 2947-2959, (2007)
[6] Hester K.C., White S.N., Peltzer E.T., Et al., Raman spectroscopic measurements of synthetic gas hydrates in the ocean, Marine Chemistry, 98, 2-4, pp. 304-314, (2006)
[7] White S.N., Dunk R.M., Peltzer E.T., Et al., In situ Raman analyses of deep-sea hydrothermal and cold seep systems (Gorda Ridge and Hydrate Ridge), Geochemistry, Geophysics, Geosystems, 7, 5, (2006)
[8] Zhang X., Du Z.F., Zheng R.E., Et al., In situ Raman-based detections of the hydrothermal vent and cold seep fluids, EGU General Assembly Conference Abstracts, 18, (2016)
[9] Breier J.A., White S.N., German C.R., Mineral-microbe interactions in deep-sea hydrothermal systems: a challenge for Raman spectroscopy, Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 368, 1922, pp. 3067-3086, (2010)
[10] White S.N., Kirkwood W., Sherman A., Et al., Development and deployment of a precision underwater positioning system for in situ laser Raman spectroscopy in the deep ocean, Deep Sea Research Part I: Oceanographic Research Papers, 52, 12, pp. 2376-2389, (2005)

← 1 2 →