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Confocal Fabry Perot Interferometer Based High Spectral Resolution Lidar
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Book Synopsis Confocal Fabry-Perot Interferometer Based High Spectral Resolution LIDAR by : David Swick Hoffman
Download or read book Confocal Fabry-Perot Interferometer Based High Spectral Resolution LIDAR written by David Swick Hoffman and published by . This book was released on 2012 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high spectral resolution lidar (HSRL), which has been developed at Montana State University, utilizes a confocal Fabry-Perot interferometer (CFP) to separate aerosol and molecular lidar returns for the purpose of atmospheric aerosol observation. The CFP is actively frequency locked to the laser-transmitter via a novel frequency modulation based technique. 532 nm second harmonic light from a frequency doubled Nd:YAG injectionseeded, pulsed laser is directed vertically into the atmosphere. Light backscattered by the atmosphere is collected using a commercial Schmidt-Cassegrain telescope. The secondharmonic return signal is mode matched into a tunable CFP interferometer with a free spectral range of 7.5 GHz and a finesse of 50.7 (312) at 532 nm (1064 nm) placed in the optical receiver for spectrally filtering the molecular and aerosol return signals. The light transmitted through the CFP is used to monitor the aerosol return signal while the light reflected by the CFP is used to monitor the molecular return signal. Data collected with the HSRL are presented and inversion results are compared to those from a co-located solar radiometer, demonstrating the successful operation of the instrument. The HSRL presented in this dissertation provides an important means to study atmospheric aerosols, which are the largest source of uncertainty in current global climate models. Additionally, the novel frequency locking technique allows for the future development of multi-wavelength HSRL instruments, and the robustness of the frequency locked optical filter allows for the deployment of future air and space based HSRL instruments.
Book Synopsis A Confocal Fabry-Perot Interferometer for Use in LIDAR Receivers by : Kerry Ann Neal
Download or read book A Confocal Fabry-Perot Interferometer for Use in LIDAR Receivers written by Kerry Ann Neal and published by . This book was released on 2009 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Confoal Fabry-Perot (CFP) interferometer was modeled, designed, built, and characterized. The proposed use of the CFP is as a narrowband filter in the receiver of lidar (light detection and ranging) instruments. Currently, a CFP very similar to the one discussed herein is being used in the High Spectral Resolution Lidar (HSRL), but through this work, the CFP will be adaptable to any lidar receiver. The goal was to characterize the CFP for a variety of parameter spaces that would be of interest to those using the CFP in a lidar receiver. These parameters include how the CFP performs with large diameter multi-spatial mode beams, large off-axis incoming angles, and large waist sizes at the center of the CFP. The modeling revealed that spherical mirrors would be suitable for the experiment. The modeling also demonstrated that angles up to 100 mrad are accepted into the CFP and waist sizes of at least 200 microns in the center of the CFP are useable. The characterization of the CFP was achieved with two experiments. The quality of performance of the CFP was expressed through measurements of finesse and transmission through the CFP for each parameter tested. The results of the experiments showed that the CFP performs optimally when nominally mode-matched or when collimated light is sent into the CFP. Also, the finesse of the CFP drops substantially as a function of the incoming waist size at first and then levels off at a fairly high finesse of around 100, which is a result that deviates from theory.
Book Synopsis Fabry-Perot Interferometers by : G. Hernandez
Download or read book Fabry-Perot Interferometers written by G. Hernandez and published by Cambridge University Press. This book was released on 1988-08-26 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the Fabry-Perot interferometer and its variants as well as its use, optimisation and applications. The author begins with an historical perspective on the development of the instrument. Because of the quantitative uses of the device, the text tends to be mostly mathematical in its treatment. However, there is also much practical detail on the use and optimization of the Fabry-Perot interferometer and discussion of its classical uses (such as in metrology) and its contemporary applications (such as in lasers). In addition the book contains a comprehensive bibliography summarizing the extensive literature on the subject. This book will appeal both to high-resolution practitioners, such as spectroscopists, and to the laser community, since the Fabrv-Perot is not only an integral part of the laser but is also usea to characterize its optical and spectroscopic behaviour.
Book Synopsis Investigation Into High Spectral Resolution Lidar Technologies by : Martha Dawsey
Download or read book Investigation Into High Spectral Resolution Lidar Technologies written by Martha Dawsey and published by . This book was released on 2013 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Intergovernmental Panel on Climate Change (IPCC) found in their 2007 report that aerosol radiative forcing contributed larger uncertainties to estimates affecting future climate change than any other radiative forcing factor. Lidar is a tool with which this uncertainty can be reduced, increasing our understanding of the impact of aerosols on climate change. Lidar, or laser radar, is a monostatic active remote sensing technique used to measure aerosols and particulates in the atmosphere, with accuracies comparable to in-situ measurements (Russell 2002). High Spectral Resolution Lidar (HSRL) systems use a narrow band filter to spectrally separate Doppler broadened aerosol and molecular back-scattered return signals, which allows for range resolved profiles of aerosol extinction and backscatter. The narrow band filter is a key component, for which two novel approaches are currently being used: NASA Langley Research Center has implemented a wide-angle Michelson interferometer in the second version of their airborne HSRL, and Montana State University is using a spherical Fabry-Perot interferometer in a ground based HSRL. In this research, a comprehensive comparative analysis of these two interferometric filters is performed, the result of which is a methodology for the design of narrow band filters for HSRL systems. The techniques presented identify the critical components and analyze the performance of each filter based on the spectral and angular properties, as well as the efficiency.
Book Synopsis Frontiers of Laser Physics and Quantum Optics by : Zhizhan Xu
Download or read book Frontiers of Laser Physics and Quantum Optics written by Zhizhan Xu and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the advent of the laser about 40 years ago, the fields of laser physics and quantum optics have evolved into a major disciplines. The early studies included optical coherence theory and semiclassical and quantum mechanical theories of the laser. More recently many new and interesting effects have been predicted. These include the role of coherent atomic effects in lasing without inversion and electromagnetically induced transparency, atom optics, laser cooling and trapping, teleportation, the single-atom micromaser and its role in quantum measurement theory, to name a few. The International Conference on Laser Physics and Quantum Optics was held in Shanghai, China, from August 25 to August 28,1999, to discuss these and many other exciting developments in laser physics and quantum optics. The international character of the conference was manifested by the fact that scientists from over 13 countries participated and lectured at the conference. There were four keynote lectures delivered by Nobel laureate Willis Lamb, Jr., Profs. H. Walther, A.E. Siegman,and M.O. Scully. In addition, there were 34 invited lectures, 27 contributed oral presentations, and 59 poster papers. We are grateful to all the participants of the conference and the contributors of this volume.
Book Synopsis Biomechanics of the Eye by : Cynthia J. Roberts
Download or read book Biomechanics of the Eye written by Cynthia J. Roberts and published by Kugler Publications. This book was released on 2018-04-20 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering all major components of the ocular system, this state-of-the-art text is essential for vision scientists, biomedical engineers, and advanced clinicians with an interest in the role of mechanics in ocular function, disease, therapeutics, and surgery. With every chapter, leading experts strengthen the arguments that biomechanics is an indispensable and rapidly evolving tool for understanding and managing ocular disease.
Book Synopsis A High Spectral Resolution Lidar Based on an Iodine Absorption Filter by : Päivi Piironen
Download or read book A High Spectral Resolution Lidar Based on an Iodine Absorption Filter written by Päivi Piironen and published by . This book was released on 1994 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shuttle Atmospheric Lidar Research Program by : United States. Atmospheric Lidar Working Group
Download or read book Shuttle Atmospheric Lidar Research Program written by United States. Atmospheric Lidar Working Group and published by . This book was released on 1979 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Shuttle Atmospheric Lidar Research Program is discussed in relation to an understanding of the processes governing the Earth's atmosphere and in the capacity to evaluate the atmospheric susceptibility to manmade and natural perturbations. Applications discussed are the determination of the global flow of water vapor and pollutants in the troposphere, improvement of chemical and transport models of the stratosphere and mesosphere, evaluation of radiative models of the atmosphere, investigation of chemistry and transport of thermospheric atomic species, and investigation of magnetospheric aspects of sun/weather relationships. The features discussed are the high spatial resolution, control of the source wavelength and intensity, and high measurement specificity.
Book Synopsis Final Report by : Edwin Walter Eloranta
Download or read book Final Report written by Edwin Walter Eloranta and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Repetitively Pulsed Tunable Dye Laser for High Resolution Spectroscopy by : Stanford University. Microwave Laboratory
Download or read book Repetitively Pulsed Tunable Dye Laser for High Resolution Spectroscopy written by Stanford University. Microwave Laboratory and published by . This book was released on 1971 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Biomedical Optics by : David A. Boas
Download or read book Handbook of Biomedical Optics written by David A. Boas and published by CRC Press. This book was released on 2016-04-19 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomedical optics holds tremendous promise to deliver effective, safe, non- or minimally invasive diagnostics and targeted, customizable therapeutics. Handbook of Biomedical Optics provides an in-depth treatment of the field, including coverage of applications for biomedical research, diagnosis, and therapy. It introduces the theory and fundamental
Book Synopsis Initial Data from a New High Spectral Resolution Lidar. Appendix A. by :
Download or read book Initial Data from a New High Spectral Resolution Lidar. Appendix A. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The University of Wisconsin High Spectral Resolution Lidar (HSRL) has been recently redesigned for operation in an electronics semitrailer van. The HSRL can now be deployed in support of field experiments. This paper presents initial observations with the new configuration along with an analysis of measurement accuracy. New measurement capabilities have been added. These include: observation of the signal variation with angular field of view, and observation of depolarization in all data channels. Depolarization measurements have been implemented by transmitting orthogonal linear polarizations on alternate laser pulses. Pulses are transmitted at 250[micro]s intervals such that the lidar observes the same ensemble of particles for both polarizations. Orthogonal polarizations are measured with a single detector per channel. Since the optical components and detector gains are identical for the two polarizations the measured depolarization ratios are independent of these factors and the system delivers very precise depolarizations. A new data channel with a computer controlled aperture allows measurements of multiple scattering as a function of receiver field of view. Since the field of view variation is dependent on the size of the scattering particles it is expected that this will allow remote measurements of cloud particle size. Other technical improvements in the new system include active control of spectrometer temperatures, greatly increased mechanical stability, an increased receiver aperture, injection of calibration signals into the signal profiles to allow continuous monitoring of system calibration drifts, and extensive computer control of system operations.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Cirrus Cloud Optical Properties by High Spectral Resolution Lidar by : Christian John Grund
Download or read book Measurement of Cirrus Cloud Optical Properties by High Spectral Resolution Lidar written by Christian John Grund and published by . This book was released on 1987 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photonic Networks, Components And Applications - Proceedings Of The Montebello Workshop by : J Terry
Download or read book Photonic Networks, Components And Applications - Proceedings Of The Montebello Workshop written by J Terry and published by World Scientific. This book was released on 1991-03-07 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Workshop gathered engineers and scientists to discuss their recent research and issues related to photonic networks and their topologies, the enabling devices and applications these networks support. Optical communication, neural, sensor and computer networks were considered. Another part of the workshop was devoted to network components based on optical fibre, semiconductor and organic materials such as lasers, amplifiers and detectors, integrated optic and optoelectronic circuits. Applications in communications, optical sensing and signal processing were addressed, with particular emphasis on avionics, submarine, space as well as office, residential, medical and specialized (captive) services.
Download or read book Optics and Lasers written by Matt Young and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optics and Lasers is an introduction to engineering and applied optics, including not only elementary ray and wave optics, but also lasers, holography, coherence, fibers, and optical waveguides. It stresses physical principles, applications, and instrumentation. The textbook will be most useful to the practicing engineer or experimental scientist, graduate student, or advanced undergraduate. It contains more than enough material from which to select the core of an introductory optics course and sufficient to form the bulk of a more advanced course.
