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Author : Jia Chen
Publisher :
ISBN 13 : 9783941650305
Total Pages : 150 pages
Book Rating : 4.6/5 (53 download)
Download or read book Compact Laser-spectroscopic Gas Sensors Using Vertical-cavity Surface-emitting Lasers written by Jia Chen and published by . This book was released on 2011 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (16 download)
Download or read book Multiplexed Gas Spectroscopy Using Tunable VCSELs written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection and identification of gas species using tunable laser diode laser absorption spectroscopy has been performed using vertical cavity surface emitting lasers (VCSEL). Two detection methods are compared: direct absorbance and wavelength modulation spectroscopy (WMS). In the first, the output of a DC-based laser is directly monitored to detect for any quench at the targeted specie wavelength. In the latter, the emission wavelength of the laser is modulated by applying a sinusoidal component on the drive current of frequency?, and measuring the harmonics component (2?) of the photo-detected current. This method shows a better sensitivity measured as signal to noise ratio, and is less susceptible to interference effects such as scattering or fouling. Gas detection was initially performed at room temperature and atmospheric conditions using VCSELs of emission wavelength 763 nm for oxygen and 1392 nm for water, scanning over a range of approximately 10 nm, sufficient to cover 5-10 gas specific absorption lines that enable identification and quantization of gas composition. The amplitude and frequency modulation parameters were optimized for each detected gas species, by performing two dimensional sweeps for both tuning current and either amplitude or frequency, respectively. We found that the highest detected signal is observed for a wavelength modulation amplitude equal to the width of the gas absorbance lines, in good agreement with theoretical calculations, and for modulation frequencies below the time response of the lasers (
Author : Yufei Ma
Publisher : MDPI
ISBN 13 : 3039283987
Total Pages : 278 pages
Book Rating : 4.0/5 (392 download)
Download or read book State-of-the-art Laser Gas Sensing Technologies written by Yufei Ma and published by MDPI. This book was released on 2020-03-05 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trace gas sensing technologies are widely used in many applications, such as environmental monitoring, life science, medical diagnostics, and planetary exploration. On the one hand, laser sources have developed greatly due to the rapid development of laser media and laser techniques in recent years. Some novel lasers such as solid-state, diode, and quantum cascade lasers have experienced significant progress. At present, laser wavelengths can cover the range from ultraviolet to terahertz, which could promote the development of laser gas sensing technologies significantly. On the other hand, some new gas sensing methods have appeared, such as photothermal spectroscopy and photoacoustic spectroscopy. Laser spectroscopy-based gas sensing techniques have the advantages of high sensitivity, non-invasiveness, and allowing in situ, real-time observation. Due to the rapid and recent developments in laser source as well as the great merits of laser spectroscopy-based gas sensing techniques, this book aims to provide an updated overview of the state-of-the-art laser gas sensing technologies.
Author : Dragan Vujanic
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (458 download)
Download or read book Tunable Diode Laser Trace Gas Detection with a Vertical Cavity Surface Emitting Laser written by Dragan Vujanic and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.3/5 (91 download)
Download or read book Vertical-cavity Surface-emitting Lasers written by and published by . This book was released on 2001 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Stewart
Publisher : Cambridge University Press
ISBN 13 : 1107174090
Total Pages : 275 pages
Book Rating : 4.1/5 (71 download)
Download or read book Laser and Fiber Optic Gas Absorption Spectroscopy written by George Stewart and published by Cambridge University Press. This book was released on 2021-04-08 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rigorous account of the physics and engineering of diode and fibre laser gas sensor design, with key applications.
Author : Rainer Michalzik
Publisher : Springer
ISBN 13 : 3642249868
Total Pages : 562 pages
Book Rating : 4.6/5 (422 download)
Download or read book VCSELs written by Rainer Michalzik and published by Springer. This book was released on 2012-10-16 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: The huge progress which has been achieved in the field is covered here, in the first comprehensive monograph on vertical-cavity surface-emitting lasers (VCSELs) since eight years. Apart from chapters reviewing the research field and the laser fundamentals, there are comprehensive updates on red and blue emitting VCSELs, telecommunication VCSELs, optical transceivers, and parallel-optical links for computer interconnects. Entirely new contributions are made to the fields of vectorial three-dimensional optical modeling, single-mode VCSELs, polarization control, polarization dynamics, very-high-speed design, high-power emission, use of high-contrast gratings, GaInNAsSb long-wavelength VCSELs, optical video links, VCSELs for optical mice and sensing, as well as VCSEL-based laser printing. The book appeals to researchers, optical engineers and graduate students.
Author : Kent D. Choquette
Publisher : SPIE-International Society for Optical Engineering
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.F/5 ( download)
Download or read book Vertical-cavity Surface-emitting Lasers VIII written by Kent D. Choquette and published by SPIE-International Society for Optical Engineering. This book was released on 2004 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Author : Michael Jetter
Publisher : John Wiley & Sons
ISBN 13 : 3527807977
Total Pages : 584 pages
Book Rating : 4.5/5 (278 download)
Download or read book Vertical External Cavity Surface Emitting Lasers written by Michael Jetter and published by John Wiley & Sons. This book was released on 2021-09-16 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vertical External Cavity Surface Emitting Lasers Provides comprehensive coverage of the advancement of vertical-external-cavity surface-emitting lasers Vertical-external-cavity surface-emitting lasers (VECSELs) emit coherent light from the infrared to the visible spectral range with high power output. Recent years have seen new device developments – such as the mode-locked integrated (MIXSEL) and the membrane external-cavity surface emitting laser (MECSEL) – expand the application of VECSELs to include laser cooling, spectroscopy, telecommunications, biophotonics, and laser-based displays and projectors. In Vertical External Cavity Surface Emitting Lasers: VECSEL Technology and Applications, leading international research groups provide a comprehensive, fully up-to-date account of all fundamental and technological aspects of vertical external cavity surface emitting lasers. This unique book reviews the physics and technology of optically-pumped disk lasers and discusses the latest developments of VECSEL devices in different wavelength ranges. Topics include OP-VECSEL physics, continuous wave (CW) lasers, frequency doubling, carrier dynamics in SESAMs, and characterization of nonlinear lensing in VECSEL gain samples. This authoritative volume: Summarizes new concepts of DBR-free and MECSEL lasers for the first time Covers the mode-locking concept and its application Provides an overview of the emerging concept of self-mode locking Describes the development of next-generation OPS laser products Vertical External Cavity Surface Emitting Lasers: VECSEL Technology and Applications is an invaluable resource for laser specialists, semiconductor physicists, optical industry professionals, spectroscopists, telecommunications engineers and industrial physicists.
Author :
Publisher :
ISBN 13 :
Total Pages : 602 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author :
Publisher :
ISBN 13 :
Total Pages : 970 pages
Book Rating : 4.E/5 ( download)
Download or read book Optical Engineering written by and published by . This book was released on 2006 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
Author : Jörg Haus
Publisher : John Wiley & Sons
ISBN 13 : 9783527629442
Total Pages : 189 pages
Book Rating : 4.6/5 (294 download)
Download or read book Optical Sensors written by Jörg Haus and published by John Wiley & Sons. This book was released on 2010-01-12 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an overview of the necessary components and the range of applications from light-barriers to high-resolution surface-scanning interferometers, this is a valuable introduction to the technology of optical sensors as well as a reference for experienced practitioners. The first part of the book introduces readers to the basics of sensor principles by describing the most important components that can be found in all optical sensors. Based on this opto-electronic toolbox, the second part then goes on to give numerous examples of optical sensors with respect to their applications.
Author :
Publisher :
ISBN 13 :
Total Pages : 2692 pages
Book Rating : 4.3/5 (91 download)
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sergey Yurish
Publisher : Lulu.com
ISBN 13 : 8409174928
Total Pages : 349 pages
Book Rating : 4.4/5 (91 download)
Download or read book SEIA' 2019 Conference Proceedings written by Sergey Yurish and published by Lulu.com. This book was released on 2020-01-13 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 5th International Conference on Sensors and Electronic Instrumentation Advances SEIA' 2019), 25-27 September 2019, Tenerife (Canary Islands), Spain. The coverage includes: various physical sensors, gas sensors, optical and fiber optical sensors and systems, biosensors, sensors networks and applications.
Author : Anthony Krier
Publisher : Springer
ISBN 13 : 1846282098
Total Pages : 756 pages
Book Rating : 4.8/5 (462 download)
Download or read book Mid-infrared Semiconductor Optoelectronics written by Anthony Krier and published by Springer. This book was released on 2007-05-22 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optoelectronic devices operating in the mid-infrared wavelength range offer applications in a variety of areas from environmental gas monitoring around oil rigs to the detection of narcotics. They could also be used for free-space optical communications, thermal imaging applications and the development of "homeland security" measures. Mid-infrared Semiconductor Optoelectronics is an overview of the current status and technological development in this rapidly emerging area; the basic physics, some of the problems facing the design engineer and a comparison of possible solutions are laid out; the different lasers used as sources for mid-infrared technology are considered; recent work in detectors is reviewed; the last part of the book is concerned with applications. With a world-wide authorship of experts working in many mid-infrared-related fields this book will be an invaluable reference for researchers and graduate students drawn from physics, electronic and electrical engineering and materials science.
Author : D. Chattopadhyay
Publisher : New Age International
ISBN 13 : 9788122417807
Total Pages : 652 pages
Book Rating : 4.4/5 (178 download)
Download or read book Electronics (fundamentals And Applications) written by D. Chattopadhyay and published by New Age International. This book was released on 2006 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Book Is Meant For The Students Pursuing A Beginners' Course In Electronics. Current Syllabi Of Basic Electronics Included In Physics (Honours) Curriculum Of Different Universities And Those Offered In Various Engineering And Technical Institutions Have Been Consulted In Preparing The Material Contained Herein.In 22 Chapters, The Book Deals With Formation Of Energy Bands In Solids; Electron Emission From Solid Surfaces; Vacuum Tubes; Properties Of Semiconductors; Pn Junction Diodes; Rectifiers; Voltage Multipliers; Clipping And Clamping Circuits; Bipolar Junction Transistors; Basic Voltage And Poweramplifiers; Feedback In Amplifiers; Regulated Power Supply; Sinusoidal Oscillators; Multivibrators; Modulation And Demodulation; Jfet And Mosfet; Ics; Op Amps; Special Semiconductor Devices, Such As Phototransistor, Scr, Triac, Diac, Ujt, Impatt Diode, Gunn Diode, Pin Diode, Igbt; Digital Circuits; Cathode Ray Oscilloscope; Radio Communication; Television; Radar And Laser.Fundamental Principles And Applications Are Discussed Herein With Explanatory Diagrams In A Clear Concise Way.Physical Aspects Are Emphasized; Mathematical Details Are Given, When Necessary. Many Of The Problems And Review Questions Included In The Book Are Taken From Recent Examination Papers. Some Objective-Type Questions Typically Set In Different Competitive Examinations Are Also Given At The End Of Each Chapter.Salient Features: * Small Geometry Effects And Effects Of Interconnects Included In Chapter 18. * A Quick Discussion On Fibre Optic Communication System In Chapter 22. * Revised And Updated To Cope With The Current Syllabii Of Some More Universities And Technical Institutions. * Chapters 6, 8, 16, 18, And 22 Have Been Changed With The Addition Of New Material. * Some More University Questions And Problems Have Been Included.
Author :
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.:/5 (317 download)
Download or read book Fourth International Microgravity Combustion Workshop written by and published by . This book was released on 1997 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
