光谱学与光谱分析, 2018, 38 (12): 3753, 网络出版: 2018-12-16  

LIBS-Raman光谱联合水下探测系统及初步试验

Development of a Combined Underwater LIBS-Raman Detection System and a Preliminary Test
作者单位
中国海洋大学光学光电子实验室, 山东 青岛 266100
摘要
水下激光诱导击穿光谱技术(LIBS)和水下激光拉曼光谱技术(Raman)已在深海成功获得应用, 这两种技术探测对象互补、器件类似, 两者联合探测可更好的进行深海研究。 针对此需求研发了一套LIBS-Raman光谱联合水下原位探测原理样机, 整个系统集成于L790 mm×Φ270 mm的舱体内, 在舱体前端有光学窗口和水密插头, 舱体内部主要包括脉冲激光器、光谱仪、 嵌入式计算机和供电转换装置, 甲板控制终端通过水密电缆实现对系统的供电、 控制和数据采集。 该联合系统采用一台双波长脉冲激光器同时作为LIBS和拉曼光谱的激发光源, LIBS采用1 064 nm波长, 拉曼光谱采用532 nm波长。 双波长激光器发出的光束经分光镜分为两路, 经过后向散射光路收集的两路信号分别进入两个小型光纤光谱仪进行分光探测, LIBS采用AvaSpec-ULS2048光谱仪, 拉曼光谱采用QE 65000光谱仪。 利用搭建的原理样机在青岛近海进行水下原位探测, 在实验室开展了水中固体靶的探测, 实验结果证明了LIBS-Raman联合光谱探测装置的可行性。 下一步将优化系统并开展深海探测应用。
Abstract
Underwater laser-induced breakdown spectroscopy (LIBS) and underwater laser Raman spectroscopy have been successfully applied in deep sea research. These two technologies have similar devices and complementary detecting targets. The combination of these two technologies is expected to be an improvement for deep-sea study. In this paper, a prototype of a combined underwater LIBS-Raman detection system was developed. The whole system was integrated into a pressure housing of L790 mm×Φ270 mm with two optical windows and water proof connector at the end cap. The underwater pressure vessel connected the deck control terminal with a water proof cable, through which power supply, system control, and signal delivery were provided. The main components inside the pressure vessel included a pulsed laser, two spectrometers, an embedded computer and power supply conversion devices. A dual-wavelength pulsed laser was used as the same excitation source for both LIBS and Raman spectroscopy. The 1 064 nm wavelength was used for LIBS excitation and the 532 nm wavelength was used for Raman spectroscopy excitation. The laser was split into two paths based on wavelength and illuminate to sample through different quartz window. The produced LIBS and Raman signals were collected by back-scattering optical set-up and coupled into the AvaSpec-ULS2048 and QE65000 optical fiber spectrometer respectively. Experiments have been carried out with calcite samples in laboratory, and the results showed LIBS and Raman spectra could be obtained simultaneously for solid samples. Field experiments were also carried out at the Qingdao coast, and the results proved the feasibility of developing a combined LIBS-Raman system for underwater detection. It is hoped that this prototype could be used in hydrothermal area detection in the near future after further optimization.

刘春昊, 郭金家, 叶旺全, 刘庆省, 李楠, 郑荣儿. LIBS-Raman光谱联合水下探测系统及初步试验[J]. 光谱学与光谱分析, 2018, 38(12): 3753. LIU Chun-hao, GUO Jin-jia, YE Wang-quan, LIU Qing-sheng, LI Nan, ZHENG Rong-er. Development of a Combined Underwater LIBS-Raman Detection System and a Preliminary Test[J]. Spectroscopy and Spectral Analysis, 2018, 38(12): 3753.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!