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Free Space Optical Communication Through Atmospheric Turbulence And Optical Modeling Of Mems Corner Cube Retroreflectors
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Book Synopsis Free-space Optical Communication Through Atmospheric Turbulence and Optical Modeling of MEMS Corner Cube Retroreflectors by : Xiaoming Zhu (Ph.D.)
Download or read book Free-space Optical Communication Through Atmospheric Turbulence and Optical Modeling of MEMS Corner Cube Retroreflectors written by Xiaoming Zhu (Ph.D.) and published by . This book was released on 2002 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MEMS Corner Cube Retroreflectors for Free-space Optical Communications by : Victor S. Hsu
Download or read book MEMS Corner Cube Retroreflectors for Free-space Optical Communications written by Victor S. Hsu and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corner Cube Retroreflectors as Transmitter in Free Space Optical Communication by : Lixia Zhou
Download or read book Corner Cube Retroreflectors as Transmitter in Free Space Optical Communication written by Lixia Zhou and published by . This book was released on 2002 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Novel Normal-to-plane Space Efficient Micro Corner Cube Retroreflector with Improved Fill Factor by : Rahul Agarwal
Download or read book A Novel Normal-to-plane Space Efficient Micro Corner Cube Retroreflector with Improved Fill Factor written by Rahul Agarwal and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: A Corner Cube Retro-reflector (CCR) is a device that can be used as transmitters in wireless free space optical communication systems, or remote sensing instruments. A novel approach to fabricate the CCR is developed, where almost 100$\%$ of the planar chip area acts as the CCR compared to the maximum of 33$\%$ in the prior MEMS CCRs. Unlike the conventional micro machined CCRs that have two planes (mirrors of the CCR) normal to the surface of the wafer, our approach yields all the mirrors within the bulk of the wafer, ensuring very high packing densities and wide acceptance angles. The crystallography of single crystal silicon wafer along with different micromachining and wafer bonding techniques are used to fabricate and assemble the CCR. The solid models of both the active and passive CCRs were built using Coventorware simulation software. In the active CCRs, one of the mirror was electrostatically actuated; this is simulated using the software.
Book Synopsis Optical MEMS for Free-space Communication by : Lixia Zhou
Download or read book Optical MEMS for Free-space Communication written by Lixia Zhou and published by . This book was released on 2004 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Techniques to Mitigate the Effects of Atmospheric Turbulence on Free Space Optical Communication Links by :
Download or read book Techniques to Mitigate the Effects of Atmospheric Turbulence on Free Space Optical Communication Links written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Cat's Eye Modulating Retro-Reflectors for Free-Space Optical Communications by :
Download or read book Performance of Cat's Eye Modulating Retro-Reflectors for Free-Space Optical Communications written by and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modulating retro-reflectors (MRR) couple passive optical retro-reflectors with electro-optic modulators to allow free-space optical communication with a laser and pointing/acquisition/tracking system required on only one end of the link. In operation a conventional free space optical communications terminal, the interrogator, is used on one end of the link to illuminate the MRR on the other end of the link with a cw beam. The MRR imposes a modulation on the interrogating beam and passively retro-reflects it back to the interrogator. These types of systems are attractive for asymmetric communication links for which one end of the link cannot afford the weight, power or expense of a conventional free-space optical communication terminal. Recently, MRR using multiple quantum well (MQW) modulators have been demonstrated using a large area MQW placed in front of the aperture of a corner-cube. For the MQW MRR, the maximum modulation can range into the gigahertz, limited only by the RC time constant of the device. This limitation, however, is a serious one. The optical aperture of an MRR cannot be too small or the amount of light retro-reflected will be insufficient to close the link. For typical corner-cube MQW MRR devices the modulator has a diameter between 0.5-1 cm and maximum modulation rates less than 10 Mbps. In this paper we describe a new kind of MQW MRR that uses a cat's eye retro-reflector with the MQW in the focal plane of the cat's eye. This system decouples the size of the modulator from the size of the optical aperture and allows much higher data rates. A 10 Mbps free space link over a range of 1 km is demonstrated. In addition a laboratory demonstration of a 70 Mbps MQW focal plane is described.
Book Synopsis Studies of the Effects of Atmospheric Turbulence on Free Space Optical Communications by : Heba Yuksel
Download or read book Studies of the Effects of Atmospheric Turbulence on Free Space Optical Communications written by Heba Yuksel and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Channel Modeling and Estimation for Free-space Optical Communications Systems in Adverse Visibility Using Radiative Transfer Theory by : Colin N. Reinhardt
Download or read book Atmospheric Channel Modeling and Estimation for Free-space Optical Communications Systems in Adverse Visibility Using Radiative Transfer Theory written by Colin N. Reinhardt and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis InGaAs Multiple Quantum Well Modulating Retro-reflector for Free Space Optical Communications by :
Download or read book InGaAs Multiple Quantum Well Modulating Retro-reflector for Free Space Optical Communications written by and published by . This book was released on 2002 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modulating retro-reflectors provide a means for free space optical communication without the need for a laser, telescope or pointer tracker on one end of the link. These systems work by coupling a retro-reflector with an electro-optic shutter. The modulating retro-reflector is then interrogated by a cw laser beam from a conventional optical communications system and returns a modulated signal beam to the interrogator. Over the last few years the Naval Research Laboratory has developed modulating retro-reflector based on comer cubes and large area Transmissive InGaAs multiple quantum well modulators. These devices can allow optical links at speeds up to about 10 Mbps. We will discuss the critical performance characteristics of such systems including modulating rate, power consumption, optical contrast ratio and operating wavelength. In addition a new modulating retro-reflector architecture based upon cat 5 eye retroreflectors will be discussed. This architecture has the possibility for data rates of hundreds of megabits per second at power consumptions below 100 mW.
Book Synopsis Optical Networking Best Practices Handbook by : John R. Vacca
Download or read book Optical Networking Best Practices Handbook written by John R. Vacca and published by John Wiley & Sons. This book was released on 2006-11-28 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Networking Best Practices Handbook presents optical networking in a very comprehensive way for nonengineers needing to understand the fundamentals of fiber, high-capacity, high-speed equipment and networks, and upcoming carrier services. The book provides a practical understanding of fiber optics as a physical medium, sorting out single-mode versus multi-mode and the crucial concept of Dense Wave-Division Multiplexing.
Book Synopsis A Critical Assessment of Selected Past Research on Optical Turbulence Information in Diverse Microclimates by :
Download or read book A Critical Assessment of Selected Past Research on Optical Turbulence Information in Diverse Microclimates written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the increased use of laser and ground-to-satellite communications the need for reliable optical turbulence information is growing. Optical turbulence information is important because it describes an atmospheric effect that can degrade the performance of electromagnetic systems and sensors, e.g., free-space optical communications and infrared imaging. However, critical analysis of selected past research indicates that there are some areas (i.e., data and models) in which optical turbulence information is lacking. For example, line-of-sight, optical turbulence data coupled with atmospheric models in hilly terrain, coastal areas, and within built-up urban areas are few in number or non-existent. In addition, the bulk of existing atmospheric computer models that are being used to provide estimates of optical turbulence are basically one-dimensional in nature and assume uniform turbulence conditions over large areas. Therefore, current optical turbulence theory and models may be critically deficient and in error for inhomogeneous turbulence conditions, such as those that occur in urban environments or environments with changing topography and energy budgets. This paper summarizes selected past research on optical turbulence and the refractive index structure parameter (C2n) in diverse microclimates in an effort to identify deficiencies in the optical turbulence information database and to recommend improvements. The database presented here contains optical turbulence (C2n) information at different wavelengths and for different microclinate environments, e.g., in rural, hilly, desert, mountain-valley, urban, coastal, ocean, and arctic. The database includes several examples of measured and modeled values of C2n in the atmospheric surface and boundary layers.
Book Synopsis Rate-Adaptive Free-Space Optical Links Over Atmospheric Turbulence and Misalignment Fading Channels by : Antonio García-Zambrana
Download or read book Rate-Adaptive Free-Space Optical Links Over Atmospheric Turbulence and Misalignment Fading Channels written by Antonio García-Zambrana and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Free-space Optical Communications Techniques and Technologies by : Monte Ross
Download or read book Advanced Free-space Optical Communications Techniques and Technologies written by Monte Ross and published by SPIE-International Society for Optical Engineering. This book was released on 2004 with total page 176 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.
Book Synopsis Laser Space Communications by : David G. Aviv
Download or read book Laser Space Communications written by David G. Aviv and published by Artech House Publishers. This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This groundbreaking resource is the first book to offer you a thorough, practical treatment of laser space communications. The book focuses on the feasibility of laser space communication links between satellites, satellites and airborne platforms, and satellites and ground based stations to achieve worldwide connectivity. You get expert guidance on weather avoidance approaches and adaptive antenna subsystems that help mitigate the effects of turbulence. The book presents simplified, yet highly accurate, engineering expressions of complex mathematics of turbulence that provide you with numerical values in the links' signal power budget. Moreover, you find an entire chapter devoted to noise photons and their effect on the bit error rate. This comprehensive volume covers a wide range of critical topics you need to understand for your work in the field, from a discussion on laser vs. RF communications in space, basic design features of a laser transceiver, and configuration of inter-satellite communication links, to selection of ground station locations, 5th Generation Internet (5-GENIN), and signal modulation schemes. The book is supported with over 70 illustrations and more than 100 equations.
