Analyzing laser-induced fluorescence spectra of petroleum products at the fluorescence excitation wavelength of 355 nm

The laser induced fluorescence spectroscopy was systematically utilized for remote sensing of different soils and rocks for the first time, to the best of our knowledge. Laser induced fluorescence spectroscopy measurements were carried out by the developed nanosecond LIDAR instrument with variable excitation wavelength (355, 532 and 1064 nm). LIDAR sensing of different Brazil soil samples have been carried out in order to construct a spectral database. The laser induced fluorescence spectra interpretation for different samples has been discussed in detail. The perspectives of LIDAR sensing of organic samples deposited at soils and rock have been discussed including future space exploration missions in the search for extraterrestrial life.

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THE EFFECTIVE OF DIFFERENT EXCITATION WAVELENGTHS ON THE IDENTIFICATION OF PLANT SPECIES BASED ON FLUORESCENCE LIDAR

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xli-b1-147-2016 ◽

2016 ◽

Vol XLI-B1 ◽

pp. 147-150

Author(s):

Jian Yang ◽

Wei Gong ◽

Shuo Shi ◽

Lin Du ◽

Jia Sun ◽

...

Keyword(s):

Remote Sensing ◽

Plant Species ◽

Fluorescence Spectra ◽

Principal Component ◽

Laser Induced Fluorescence ◽

Support Vector ◽

Excitation Wavelength ◽

Lidar System ◽

Excitation Light

Laser-induced fluorescence (LIF) served as an active technology has been widely used in many field, and it is closely related to excitation wavelength (EW). The objective of this investigation is to discuss the performance of different EWs of LIF LiDAR in identifying plant species. In this study, the 355, 460 and 556 nm lasers were utilized to excite the leaf fluorescence and the fluorescence spectra were measured by using the LIF LiDAR system built in the laboratory. Subsequently, the principal component analysis (PCA) with the help of support vector machine (SVM) was utilized to analyse fluorescence spectra. For the three EWs, the overall identification rates of the six plant species were 80 %, 83.3 % and 90 %. Experimental results demonstrated that 556 nm excitation light source is superior to 355 and 460 nm for the classification of the plant species for the same genus in this study. Thus, an appropriate excitation wavelength should be considered when the LIF LiDAR was utilized in the field of remote sensing based on the LIF technology.

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Analysis of Laser-Induced Fluorescence Spectra Obtained in Spray Flames of Diesel and Rapeseed Methyl Ester Using the Multiple-Excitation Wavelength Laser-Induced Incandescence Technique with IR, UV, and Visible Excitations

Combustion Science and Technology ◽

10.1080/00102202.2014.973949 ◽

2015 ◽

Vol 187 (6) ◽

pp. 906-924 ◽

Cited By ~ 8

Author(s):

Salma Bejaoui ◽

Romain Lemaire ◽

Eric Therssen

Keyword(s):

Methyl Ester ◽

Fluorescence Spectra ◽

Laser Induced Fluorescence ◽

Excitation Wavelength ◽

Spray Flames ◽

Laser Induced Incandescence ◽

Rapeseed Methyl Ester

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Eye-Safe Wavelength Laser Fluorimeter for Noncontact Monitoring the Ecological Condition of Objects in Natural Environment

Mechanical Engineering and Computer Science ◽

10.24108/0518.0001398 ◽

2018 ◽

pp. 30-42

Author(s):

M. L. Belov ◽

Yu. V. Fedotov ◽

D. A. Kravtsov ◽

V. A. Gorodnichev

Keyword(s):

Spectral Range ◽

Natural Environment ◽

Spectral Band ◽

Experimental Studies ◽

Ecological Monitoring ◽

Laser Induced Fluorescence ◽

Ecological Condition ◽

Excitation Wavelength ◽

Fluorescence Excitation ◽

Laser Fluorimeter

Presently, a problem of ecological monitoring of natural environment is critical.Laser methods are the most powerful to provide noncontact and remote ecological monitoring of natural environment. Among laser monitoring methods, laser fluorescent ones are of strong interest.Today, there are laser fluorescent devices designed to monitor ecological condition of various objects in natural environment. To produce laser-induced fluorescence excitation, laser fluorescent devices use a variety of radiation sources in the spectral band from 226 to 635 nm.However, to have an advanced laser fluorescent device for noncontact ecological monitoring of natural environment, devices to be created should be multifunctional and use an eye-safe wavelength for fluorescence excitation.A fluorescence excitation wavelength of 355 nm (the third harmonic of a YAG: Nd laser) appears to be promising. This wavelength is eye-safe and can be used to monitor ecological condition of a large number of nature-made objects.The paper conducts a capability analysis of noncontact laser fluorescent monitoring of ecological condition of natural environment using the eye-safe fluorescence excitation wavelength of 355 nm. Describes a laser fluorimeter mock-up and presents experimental results of laser-induced fluorescence spectra of nature-made objects.The experimental studies have shown that the noncontact laser fluorimeter using the eye-safe fluorescence excitation wavelength of 355nm potentially allows us to control the ecological condition of a large number of nature-made objects.The fluorescence intensities in the certain spectral ranges (for example, within the spectral range of ~ 425 – 450 nm) and a spectrum profile of plant fluorescence (in the spectral range of 670 - 750 nm) can be used as the controlled variables.

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THE EFFECTIVE OF DIFFERENT EXCITATION WAVELENGTHS ON THE IDENTIFICATION OF PLANT SPECIES BASED ON FLUORESCENCE LIDAR

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprsarchives-xli-b1-147-2016 ◽

2016 ◽

Vol XLI-B1 ◽

pp. 147-150 ◽

Cited By ~ 3

Author(s):

Jian Yang ◽

Wei Gong ◽

Shuo Shi ◽

Lin Du ◽

Jia Sun ◽

...

Keyword(s):

Remote Sensing ◽

Plant Species ◽

Fluorescence Spectra ◽

Principal Component ◽

Laser Induced Fluorescence ◽

Support Vector ◽

Excitation Wavelength ◽

Lidar System ◽

Excitation Light

Laser-induced fluorescence (LIF) served as an active technology has been widely used in many field, and it is closely related to excitation wavelength (EW). The objective of this investigation is to discuss the performance of different EWs of LIF LiDAR in identifying plant species. In this study, the 355, 460 and 556 nm lasers were utilized to excite the leaf fluorescence and the fluorescence spectra were measured by using the LIF LiDAR system built in the laboratory. Subsequently, the principal component analysis (PCA) with the help of support vector machine (SVM) was utilized to analyse fluorescence spectra. For the three EWs, the overall identification rates of the six plant species were 80 %, 83.3 % and 90 %. Experimental results demonstrated that 556 nm excitation light source is superior to 355 and 460 nm for the classification of the plant species for the same genus in this study. Thus, an appropriate excitation wavelength should be considered when the LIF LiDAR was utilized in the field of remote sensing based on the LIF technology.

Download Full-text