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10.1117/12.2283458ISTPBabichenko S., 2008, P REM SENS EUR SEAS, P189; Chekalyuk A, 2014, OPT EXPRESS, V22, P21641, DOI 10.1364/OE.22.021641; Demtroder W., 2003, LASER SPECTROSCOPY B, P441; Hoge FE, 2005, APPL OPTICS, V44, P2857, DOI 10.1364/AO.44.002857; HOGE FE, 1983, APPL OPTICS, V22, P2991, DOI 10.1364/AO.22.002991; Ivanov I. G., 1988, Soviet Journal of Quantum Electronics, V18, P123, DOI 10.1070/QE1988v018n01ABEH011231; Li Xiao-long, 2013, Chinese Journal of Quantum Electronics, V30, P129, DOI 10.3969/j.issn.1007-5461.2013.02.001; Li XL, 2014, J OCEAN U CHINA, V13, P597, DOI 10.1007/s11802-014-2098-3; Patsayeva S., 1997, P 3 EARSEL WORKSH TA, P339Annual Conference of the Chinese-Society-for-Optical-Engineering (CSOE) on Applied Optics and Photonics China (AOPC) - Optical Sensing and Imaging Technology and Applications639400210462Proc.SPIE2017saturated excitation; chlorophyll-a; Laser Induced Fluorescence (LIF); nonlinear characteristics; fluorescenceLIDARSESE141499146214621CLaser induced fluorescence (LIF) is a common technique for measuring chlorophyll-a (Chl-a) concentration in water, and is able to obtain profile distribution. The natural water body is a turbid media for laser transmission, resulting in a great attenuation of luminance in a short distance. Increasing laser intensity is often considered an effective way to probe deeper. However, it has been found that there is a non-linear relationship between fluorescence intensity of Chl-a solution and laser energy which may causes laser-induced saturation of fluorescence with measurement conditions unchanged. Thus, the saturation effects of Chl-a fluorescence at 685 nm were studied at two aspects, namely, Chl-a concentration and the intensity of excitation pulse. In the experiment, several concentrations of Chl-a solution were measured by 355 nm laser. For a fixed Chl-a concentration, the intensity of fluorescence gradually becomes to worse following the intensity of excitation pulse raised, while the ratios of Raman intensity of water to pulse intensity correspond to a good linear relationship. On the other hand, with different energy densities of excitation laser, the variations of Chl-a fluorescence intensity were analyzed by non-linear curve fitting. For higher Chl-a concentration, the lower threshold value of excitation intensity can lead to the nonlinearity of induced fluorescence intensity versus laser intensity. Here, the nonlinear changes of Chl-a fluorescence with saturated excitation are studied for supporting the measurement of oceanographic fluorescence by LIF and correctly estimating chlorophyll concentrations.AOPC 2017: OPTICAL SENSING AND IMAGING TECHNOLOGY AND APPLICATIONSNonlinear changes of chlorophyll-a fluorescence with laser induced saturation会议论文EnglishLi Xiao-long; Yu Fei; Chen Yong-hua; Jiang Jing-bo; Liu Qing-kui; He Yan; Chen Wei-biao42380104621C WOS:000425515000047
外文题目: Nonlinear changes of chlorophyll-a fluorescence with laser induced saturation
作者: Li Xiao-long; Yu Fei; Chen Yong-hua; Jiang Jing-bo; Liu Qing-kui; He Yan; Chen Wei-biao
刊名: Proc.SPIE
来源图书: AOPC 2017: OPTICAL SENSING AND IMAGING TECHNOLOGY AND APPLICATIONS
年: 2017 卷: 10462 文章编号:104621C
会议名称: Annual Conference of the Chinese-Society-for-Optical-Engineering (CSOE) on Applied Optics and Photonics China (AOPC) - Optical Sensing and Imaging Technology and Applications
英文关键词:
saturated excitation; chlorophyll-a; Laser Induced Fluorescence (LIF); nonlinear characteristics; fluorescence
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英文摘要:
文献类型: 会议论文
正文语种: English
收录类别: ISTP  
DOI: 10.1117/12.2283458
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