Download or read book Ultra Narrowband Optical Filters for Water Vapor Differential Absorption Lidar Dial Atmospheric Measurements written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-12 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Differential absorption lidar (DIAL) systems are being deployed to make vertical profile measurements of atmospheric water vapor from ground and airborne platforms. One goal of this work is to improve the technology of such DIAL systems that they could be deployed on space-based platforms. Since background radiation reduces system performance, it is important to reduce it. One way to reduce it is to narrow the bandwidth of the optical receiver system. However, since the DIAL technique uses two or more wavelengths, in this case separated by 0.1 nm, a fixed-wavelength narrowband filter that would encompass both wavelengths would be broader than required for each line, approximately 0.02 nm. The approach employed in this project is to use a pair of tunable narrowband reflective fiber Bragg gratings. The Bragg gratings are germanium-doped silica core fiber that is exposed to ultraviolet radiation to produce index-of-refraction changes along the length of the fiber. The gratings can be tuned by stretching. The backscattered laser radiation is transmitted through an optical circulator to the gratings, reflected back to the optical circulator by one of the gratings, and then sent to a photodiode. The filter reflectivities were >90 percent, and the overall system efficiency was 30 percent.Stenholm, Ingrid and DeYoung, Russell J.Langley Research CenterBRAGG GRATINGS; DIFFERENTIAL ABSORPTION LIDAR; NARROWBAND; OPTICAL FILTERS; REFLECTANCE; ATMOSPHERIC MOISTURE; BACKSCATTERING; DOPED CRYSTALS

Download or read book Ultra Narrowband Optical Filters for Water Vapor Differential Absorption Lidar DIAL Atmospheric Measurements written by Ingrid Stenholm and published by . This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Narrownad Optical Filters for Water Vapor Differential Absorption Lidar DIAL Atmospheric Measurements written by Ingrid Stenholm and published by . This book was released on 2001 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Narrow Band Fiber Optic Bragg Grating Filters For Atmospheric Water Vapor Measurements PHD written by Lelia Belle Vann and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Differential Absorption Lidar Measurements of Atmospheric Water Vapor Using a Pseudonise Code Modulated AIGaAs Laser written by Jonathan Andrew Reily Rall and published by . This book was released on 1993 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Digest written by and published by . This book was released on 2004 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Airborne Differential Absorption Lidar for Water Vapour Measurements in the Upper Troposphere and Lower Stratosphere in the Spectral Region Around 940 Nm written by Gorazd Poberaj and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ti:sapphire laser, optical parametric oscillator, injection seeding, LIDAR, DIAL, water vapour, potential vorticity streamer, stratospheric intrusion.

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Download or read book Summaries of Papers Presented at the Conference on Lasers and Electro optics written by and published by . This book was released on 2004 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Remote Sensing of the Atmosphere written by Optical Society of America and published by . This book was released on 2001 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin Film Optical Filters written by H. Angus MacLeod and published by CRC Press. This book was released on 2001-01-26 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very common optical coatings are those that give the faint, reflected color to the lenses in cameras, binoculars, and spectacles. The thin metal layer that makes the difference between a mirror and a simple sheet of glass is an optical coating. But, optical coatings are used in many more applications-a particularly important current one being the s

Download or read book Proceedings of the International Symposium on Remote Sensing of Environment written by and published by . This book was released on 2003 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book NASA Langley Scientific and Technical Information Output 2001 written by and published by . This book was released on 2002 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Differential Absorption Lidar System for High Resolution Water Vapor Measurements in the Troposphere written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A differential absorption lidar system for the high resolution water vapor measurements in the troposphere written by Jens Bösenberg and published by . This book was released on 1991 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lidar written by Claus Weitkamp and published by Springer Science & Business. This book was released on 2006-06-03 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experts in optical radar, or lidar, this book brings all the recent practices up-to-date. With a Foreword by one of the founding fathers in the area. Its broad cross-disciplinary scope should appeal to scientists ranging from the view of optical sciences to environmental engineers. Optical remote sensing has matured to become a lead method for cross-disciplinary research. This new multi-authored book reviews the state-of-the-art in a readable monograph.