Download or read book Optical Multichannel Analyzer Techniques for High Resolution Optical Spectroscopy written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of optical multichannel analyzer techniques for UV/VIS spectroscopy is presented. The research focuses on the development of spectroscopic techniques for measuring high resolution spectral lineshape functions from the exciton phosphorescence in H2-1,2,4,5-tetrachlorobenzene. It is found that the temperature dependent frequency shifts and widths confirm a theoretical model based on an exchange theory. The exchange of low energy phonon modes which couple with excited state exciton transitions is shown to display the proper temperature dependent behavior. In addition to the techniques for using the optical multichannel analyzer (OMA) to perform low light level target integration, the use of the OMA for capturing spectral information in transient pulsed laser applications is discussed. An OMP data acquisition system developed for real-time signal processng is described. Both hardware and software interfacing considerations for control and data acquisition by a microcomputer are described. The OMA detector is described in terms of the principles behind its photoelectron detection capabilities and its design is compared with other optoelectronic devices.
Download or read book Optical Multichannel Analyzer Techniques for High Resolution Optical Spectroscopy written by James Lee Chao and published by . This book was released on 1980 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Spectroscopy written by Nikolai V. Tkachenko and published by Elsevier. This book was released on 2006-06-06 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Spectroscopy bridges a gap by providing a background on optics while focusing on spectroscopic methodologies, tools and instrumentations. The book introduces the most widely used steady-state and time-resolved spectroscopic techniques, makes comparisions between them, and provides the methodology for estimating the most important characteristics of the techniques such as sensitivity and time resolution. Recent developments in lasers, optics and electronics has had a significant impact on modern optical spectroscopic methods and instrumentations. Combining the newest lasers, advanced detectors and other high technology components researchers are able to assemble a spectroscopic instrument with characteristics that were hardly achievable a decade ago. This book will help readers to sourse spectroscopy tools to solve their problems by providing information on the most widely used methods while introducing readers to the principles of quantitative analysis of the application range for each methodology. In addition, background information is provided on optics, optical measurements and laser physics, which is of crucial importance for spectroscopic applications. * provides an overview of the most popular absorption/emission spectroscopy techniques* discusses application range, advantages and disadvantages are compared for different spectroscopy methods* provides introductions to the relevant topics such as optics and laser physics
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Isotopic Materials Science written by Vladimir G. Plekhanov and published by Springer. This book was released on 2018-12-05 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes new trends in the nanoscience of isotopic materials science. Assuming a background in graduate condensed matter physics and covering the fundamental aspects of isotopic materials science from the very beginning, it equips readers to engage in high-level professional research in this area. The book ́s main objective is to provide insight into the question of why solids are the way they are, either because of how their atoms are bonded with one another, because of defects in their structure, or because of how they are produced or processed. Accordingly, it explores the science of how atoms interact, connects the results to real materials properties, and demonstrates the engineering concepts that can be used to produce or improve semiconductors by design. In addition, it shows how the concepts discussed are applied in the laboratory. The book addresses the needs of researchers, graduate students and senior undergraduate students alike. Although primarily written for materials science audience, it will be equally useful to those teaching in electrical engineering, materials science or even chemical engineering or physics curricula. In order to maintain the focus on materials concepts, however, the book does not burden the reader with details of many of the derivations and equations nor does it delve into the details of electrical engineering topics.
Download or read book High resolution Optical Spectroscopy by Reciprocal space Analysis written by Sang-Duk Yoo and published by . This book was released on 1999 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Postdoctoral Research Associateships written by and published by . This book was released on 1984 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unconventional Spectroscopy written by Jacob Morris Weinberg and published by . This book was released on 1976 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Optical Coherent channel Analyzer Using Balanced coherent Detection and Temperature tuned DFB Laser as Local Oscillator written by Rejoy Isaac and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid increase in demand for bandwidth in optical networks over the last two decades has led to the development of wavelength division multiplexing where multiple channels are transmitted simultaneously at different wavelengths over a single optical-fiber to maximize the usage of the bandwidth available in fiber. Increasing demand for bandwidth has led to narrower channel spacing and the use of advanced modulation schemes that are more spectrally efficient than traditional on-off keying techniques [1]. Nonlinearities and dispersion effects in fiber accumulate over a long distance and can adversely affect the quality of a channel. Hence the ability to measure detailed features of the optical spectrum is crucial to study the performance of a communication link. A conventional optical spectrum analyzer (OSA) based on a diffraction grating has a wide wavelength or frequency scanning range, but suffers from poor frequency resolution. The narrowest resolution bandwidth reported for a grating based OSA is - 0.06nm or 7.5GHzat 1550nm [1]. Various spectral features of interest, such as the transmission spectrum of a laser and modulation spectrum of a channel require sub-picometer resolution, which cannot be achieved by conventional methods using a diffraction grating. High resolution spectrum analyzers (HRSAs) have been built based on heterodyne detection where a portion of the optical spectrum is converted to radio-frequency (RF) with DC corresponding to the local-oscillator (LO) central frequency [3-6]. This is a common technique used in RF-spectrum analyzers. The resolution bandwidth is determined by the electrical bandwidth of the optical receiver. The lowest resolution bandwidth reported is of the order of tens of MHz [6]. Widespread implementation of these instruments however, has been limited owing to their cost and size, one of the major factors being the external cavity (ECT) lasers used as the local-oscillator source in such instruments. We have built a coherent-channel analyzer (CCA) based on balanced coherent detection using a commercial distributed-feedback (DFB) laser as the LO. The use of a DFB laser for the CCA has the potential of reducing the cost of the instrument by at least one-tenth of the price of an HRSA. In this thesis we describe the working of the CCA. We provide an end-to-end system model, analyze the resolution and sensitivity performance of the system, and demonstrate a frequency resolution of 100MHz over the DFB tuning range of 200GHz with a sensitivity of -95dBm. The CCA provides a practical, cost and size effective alternative to the HRSA at the cost of tunability.
Download or read book Optical Spectroscopy and Computational Methods in Biology and Medicine written by Malgorzata Baranska and published by Springer Science & Business Media. This book was released on 2013-12-05 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-author contributed volume gives a comprehensive overview of recent progress in various vibrational spectroscopic techniques and chemometric methods and their applications in chemistry, biology and medicine. In order to meet the needs of readers, the book focuses on recent advances in technical development and potential exploitations of the theory, as well as the new applications of vibrational methods to problems of recent general interest that were difficult or even impossible to achieve in the not so distant past. Integrating vibrational spectroscopy and computational approaches serves as a handbook for people performing vibrational spectroscopy followed by chemometric analysis hence both experimental methods as well as procedures of recommended analysis are described. This volume is written for individuals who develop new methodologies and extend these applications to new realms of chemical and medicinal interest.
Download or read book Photon Correlation Techniques in Fluid Mechanics written by E.O. Schulz-Dubois and published by Springer. This book was released on 2013-06-29 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photon correlation is a kind of spectroscopy designed to identify optical frequency shifts and line-broadening effects in the range of many MHz down to a few Hz. The optical intensity is measured in terms of single photon detection events which result in current pulses at the output of photomulti plier tubes. This signal is processed in real time in a special-purpose paral lel processor known as a correlator. The resulting photon correlation func tion, a function in the time domain, contains the desired spectral informa tion, which may be extracted by a suitable algorithm. Due to the non-intrusive nature and the sound theoretical basis of photon correlation, the phenomena under study are not disturbed, and the parameters in question can be precisely evaluated. For these reasons photon correlation has become a valuable and in many instances indispensable technique in two distinct fields. One of these is velocimetry in fluid flow. This includes hydro- and aerodynamic processes in liquids, gases, or flames where the velo city field may be stationary, time periodic, or turbulent, and may range from micrometers per second for motion inside biological cells to one kilometer per second for supersonic flow. The other major field is stochastic particle propagation due to Brownian motion.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1985 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooperative Research Associateships Post Doctoral Research Awards written by and published by National Academies. This book was released on 1990 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomedical Optics in Otorhinolaryngology written by Brian J.-F. Wong and published by Springer. This book was released on 2016-08-22 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomedical Optics in Otorhinolaryngology: Head and Neck Surgery gives an overview of current technology in biomedical optics relevant to the field of Otorhinolaryngology and head and neck surgery. It provides a comprehensive source of knowledge for researchers and active clinicians seeking information on the principles and practical use of novel diagnostic and therapeutic technology. While most books focus exclusively on laser surgery, which has been largely unchanged for the past 15 years, optical diagnostics and head and neck PDT (photodynamic therapy) are usually entirely overlooked. This book contains a basic introduction into the physics of light and its propagation, lasers and low-coherent light sources, and photon-tissue interaction in relation to therapeutic and diagnostic use. The principles of various imaging techniques are also discussed ( i.e. optical coherence tomography in its variations), as well as the principles and practice of lasers for surgical use on the therapeutic side.
Download or read book Recent Advances in Optical Spectroscopy Using High Performance Array Detectors written by M. B. Denton and published by . This book was released on 1988 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The operational characteristics of several new solid state array detectors investigated in our laboratories have shown themselves to be highly suitable for application in analytical spectroscopy. The devices investigated to date are selected charge-coupled devices (CCDs) and charge injection devices (CIDs), each of which has certain unique capabilities which can be exploited for solving a variety of spectroscopic problems. Readout speed considerations when using sequential, pseudo-random, random, binning, and rapid scanning readout modes will be discussed. Optoelectronic characteristics of these devices including dynamic range, quantum efficiency, noise, resistance to blooming and lag will be contrasted to photodiode arrays, vidicons, and photomultiplier tubes. Several optical configurations for array detector spectrometers which effectively utilize the various device geometries including the latest generation echelle configuration will be presented. Design considerations including resolution, spectral coverage, detector element size, stray light, and image reduction will be discussed. Keywords: Optical spectroscopy; Multichannel techniques; Charge transfer devices.
