3 edition of Laser spectroscopy for sensitive detection found in the catalog.
Laser spectroscopy for sensitive detection
by SPIE--the International Society for Optical Engineering in Bellingham, Wash
Written in English
Includes bibliographical references and indexes.
|Statement||Jerry A. Gelbwachs, editor.|
|Series||Proceedings of SPIE--the International Society for Optical Engineering ;, v. 286|
|Contributions||Gelbwachs, Jerry A., Society of Photo-optical Instrumentation Engineers.|
|LC Classifications||QC454.L3 L36|
|The Physical Object|
|Pagination||vi, 162 p. :|
|Number of Pages||162|
|LC Control Number||81051931|
2. Laser-induced Fluorescence Spectroscopy Introduction Laser-induced fluorescence spectroscopy is based on the electronic excitation of an atom or molecule by laser irradiation. When the electron returns to a lower-lying energy level, the energy may be released in the form of a photon. This forms the basic principle of fluorescence. We report the use of gold nanorods as solution-based SERS substrates for the detection of ultralow-levels of three different dithiocarbamate fungicides: thiram, ferbam and nanorods are attractive to use as SERS substrates due to the ability to tune the surface plasmon resonance of the nanoparticles to the laser excitation wavelength of the Raman spectrometer equipped with a nm.
In this paper we present a prototype instrument for remote open-path detection of nitrous oxide. The sensor is based on a μm quantum cascade laser and uses the chirped laser dispersion spectroscopy (CLaDS) technique for molecular concentration measurements. To the best of our knowledge this is the first demonstration of open-path laser-based trace-gas detection using a . Sensitive Detection of Epithelia l Ovarian Cancer Biomarkers Using Tag-Laser Induced Breakdown Spectroscopy Fig. 2. LIBS experimental set-up consisting of a Nd-YAG Laser pulse laser, prism, focus ing lens, bundle of light collecting optical fibers, thermoelectric cooler (TEC), a Helium line and.
Due to the fact of global warming, air quality deterioration and health concern over the past few decades, great demands and tremendous efforts for new technology to detect hazard gases such as CH4, CO2, CO, H2S, and HONO have been performed. Tunable diode laser absorption spectroscopy (TDLAS) is a kind of technology with advantages of high sensitivity, high selectivity, and fast responsivity. Laser spectroscopy: basic concepts and instrumentation.
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Werle, in Laser Spectroscopy for Sensing, Conclusion. Laser spectroscopy is a versatile diagnostic tool for analytical applications and recent advances in semiconductor laser technology (QCL, DFB, VCSEL) combined with selective and sensitive spectroscopic detection techniques have led to the development of new diagnostic tools for trace gas and isotope analysis.
"This book is primarily intended as a textbook for a course in modern spectroscopy based on the laser. for the advanced student or for a course designed for physics graduate students working directly in almost any form of spectroscopy, this volume will serve as an excellent text and/or source book/5(5).
Get this from a library. Laser spectroscopy for sensitive detection: April, Washington, D.C. [Jerry A Gelbwachs; Society of Photo-optical Instrumentation Engineers.;]. In this work, a simple but efficient strategy named metal-chelate induced nanoparticle aggregation enhanced laser-induced breakdown spectroscopy (MINAELIBS) was proposed for signal enhancement aiming at ultra-sensitive detection of trace levels of metal elements in liquid samples.
While the general concept is unchanged, the new edition features a broad array of new material, e.g., frequency doubling in external cavities, reliable cw-parametric oscillators, tunable narrow-band UV sources, more sensitive detection techniques, tunable femtosecond lasers and pulse shaping techniques for realizing coherent control of.
Part III: Applications of laser spectroscopy and sensing. Laser spectroscopy for the detection of chemical, biological and explosive threats.
Abstract: Introduction. Laser-induced breakdown spectroscopy (LIBS) Fluorescence. Raman. Conclusion. References. Laser spectroscopy for medical applications. Abstract. Absorption laser spectroscopy in the mid-IR is a direct method for the anal.
of the 15N isotopic compn. of N2O, yet not sensitive enough for atm. N2O mixing ratios ( ppb). To enable a fully-automated high precision anal.
of N2O isotopic species at ambient mixing ratios, we built and optimized a liq. nitrogen-free preconcn. unit to be coupled. The scope of this chapter is rather to discuss recent developments of mid-infrared laser sources, with emphasis on established and new spectroscopic techniques and their applications for sensitive, selective, and quantitative trace gas detection.
Quartz-enhanced photoacoustic spectroscopy is a sensitive gas detection method whereby radiation-induced sound waves from gas absorption are detected. Here, Wuet al. use the beat frequency between. The potential of these new methods and the impact that many of them have already made is well illustrated in this book.
As volume 43 of the Springer-Verlag series, ‘Lecture notes in Physics’ it presents the invited papers given at the Second Conference on Laser Spectroscopy held at.
Laser absorption spectrometry (LAS) refers to techniques that use lasers to assess the concentration or amount of a species in gas phase by absorption spectrometry (AS). Optical spectroscopic techniques in general, and laser-based techniques in particular, have a great potential for detection and monitoring of constituents in gas combine a number of important properties, e.g.
Sensitive acetone detection with a mid-IR interband cascade laser and wavelength modulation spectroscopy Article (PDF Available) March with Reads How we measure 'reads'. Purchase Ultrasensitive Laser Spectroscopy - 1st Edition. Print Book & E-Book. ISBNWhile the general concept is unchanged, the new edition features a broad array of new material, e.g., frequency doubling in external cavities, reliable cw-parametric oscillators, tunable narrow-band UV sources, more sensitive detection techniques, tunable femtosecond and sub-femtosecond lasers (X-ray region and the attosecond range), control of.
Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded.
While the general concept is unchanged, the new edition features a broad array of new material, e.g., frequency doubling in external cavities, reliable cw-parametric oscillators, tunable narrow-band UV sources 5/5(1).
The laser source is frequency modulated to provide the sensitivity enhancement associated with derivative spectroscopy. One of the laser beams is passed through a reference cell containing the gas to be detected in order to lock the laser frequency to the center of the absorption line.
Pokrowsky and W. Herrmann "Sensitive Detection Of. Quartz-enhanced photo-acoustic spectroscopy (QEPAS) 8,9,10 and cantilever-enhanced photo-acoustic spectroscopy (CEPAS) 11,12 have enabled ultra-sensitive trace gas detection below the part-per.
Laser spectroscopic techniques suitable for molecular dispersion sensing enable new applications and strategies in chemical detection. This paper discusses the current state-of-the art and provides an overview of recently developed chirped laser dispersion spectroscopy (CLaDS) based techniques.
Different coherent detection schemes and their impact on sensitivity of mid-infrared laser spectrometers used for chemical detection will be discussed. Several example applications will be given.
Fingerprint Dive into the research topics of 'Coherent detection schemes for ultra-sensitive molecular spectroscopy in the mid-IR'. Together they. 17 May High sensitive detection of atmospheric methane using infrared laser absorption spectroscopy.
Jian Sang, Xiaoyun Yang, Tianbo He, Jingsong Li. Author Affiliations + Proceedings Volume14th National Conference on Laser Technology and. Laser Spectroscopy for Sensing examines these advances and how laser spectroscopy can be used in a diverse range of industrial, medical, and environmental applications.
Part one reviews basic concepts of atomic and molecular processes and presents the fundamentals of laser technology for controlling the spectral and temporal aspects of laser.Ultrafast laser spectroscopy is a spectroscopic technique that uses ultrashort pulse lasers for the study of dynamics on extremely short time scales (attoseconds to nanoseconds).Different methods are used to examine the dynamics of charge carriers, atoms, and molecules.
Many different procedures have been developed spanning different time scales and photon energy ranges; some common methods.Keywords: tunable diode laser absorption spectroscopy (TDLAS), signal processing, Savitzky–Golay filter, trace gas detection.
1. Introduction Industrial gas measurements are usually performed using gas chromatographs (GCs) which have time constants of minute level. Being high sensitive .