Fabrication and Characterization of Gallium Arsenide/aluminum Gallium Arsenide Semiconductor Ring Laser for Realization of Miniature Gyroscope PDF Download
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Author: Jay Prakash Gupta Publisher: ProQuest ISBN: 9780549926825 Category : Aluminum Languages : en Pages :
Book Description
There is demand for a robust, compact and sensitive gyroscope which can be utilized as a navigational tool for modern commercial and military applications, as well as there is a need of constant improvement in performance and reduction in bulk and weight of the gyroscope at the same time. A compact integrated design based on semiconductor materials has the highest hope of meeting the measurement conditions for military and commercial applications as well as providing the potential for low cost, high volume manufacturing. To this end, my work focuses on fabrication and characterization of one of the key elements of a GaAs / AlGaAs semiconductor ring laser (SRL) gyroscope, SRL. The goal of the thesis is to fabricate a SRL with characteristics required for its use in a SRL gyroscope. In this thesis, I first describe the working principle of the SRL gyroscope. The lock-in in the SRL is explained and an approach to break the lock-in is described. Then the effort put into the fabrication of SRL, problems faced and methods used to rectify them is described in detail. Afterwards, I explain the test setup built to characterize the fabricated SRLs. Finally, I quantify the results obtained by characterizing the fabricated structures and research to follow in the future.
Author: Jay Prakash Gupta Publisher: ProQuest ISBN: 9780549926825 Category : Aluminum Languages : en Pages :
Book Description
There is demand for a robust, compact and sensitive gyroscope which can be utilized as a navigational tool for modern commercial and military applications, as well as there is a need of constant improvement in performance and reduction in bulk and weight of the gyroscope at the same time. A compact integrated design based on semiconductor materials has the highest hope of meeting the measurement conditions for military and commercial applications as well as providing the potential for low cost, high volume manufacturing. To this end, my work focuses on fabrication and characterization of one of the key elements of a GaAs / AlGaAs semiconductor ring laser (SRL) gyroscope, SRL. The goal of the thesis is to fabricate a SRL with characteristics required for its use in a SRL gyroscope. In this thesis, I first describe the working principle of the SRL gyroscope. The lock-in in the SRL is explained and an approach to break the lock-in is described. Then the effort put into the fabrication of SRL, problems faced and methods used to rectify them is described in detail. Afterwards, I explain the test setup built to characterize the fabricated SRLs. Finally, I quantify the results obtained by characterizing the fabricated structures and research to follow in the future.
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 1370
Book Description
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: Swadesh Chaulya Publisher: Elsevier ISBN: 0128031956 Category : Science Languages : en Pages : 434
Book Description
Sensing and Monitoring Technologies for Mines and Hazardous Areas: Monitoring and Prediction Technologies presents the fundamentals of mining related geotechnical risk and how the latest advances in sensing and data communication can be used both to prevent accidents and provide early warnings. Opencast mining operations involve huge quantities of overburden removal, dumping, and backfilling in excavated areas. Substantial increases in the rate of accumulation of waste dumps in recent years has resulted in greater height of dumps and also has given rise to the danger of dump failures as steeper open pit slopes are prone to failure. These failures lead to loss of valuable human lives and damage to mining machinery. This book presents the most recent advances in gas sensors, methane detectors, and power cut-off systems. It also introduces monitoring of the gas strata and environment, and an overview of the use of Internet of Things and cloud computing for mining sensing and surveillance purposes. Targeted at geotechnical and mining engineers, this volume covers the latest findings and technology to prevent mining accidents and mitigate the inherent risk of the activity. - Presents complete details of a real-time slope stability monitoring system using wireless sensor networking and prediction technique based on multivariate statistical analysis of various parameters and analytical hierarchy process methods - Discusses innovative ideas and new concepts of sensing technologies, mine transport surveillance, digital mining, and cloud computing to improve safety and productivity in mining industry - Includes slope stability prediction software, downloadable through a companion website, which can be used for monitoring, analyzing, and storing different sensors and providing audio-visual, SMS, and email alerts - Covers the latest findings and technology to prevent mining accidents and mitigate the inherent risk
Author: Andrea Chen Publisher: CRC Press ISBN: 1439862079 Category : Technology & Engineering Languages : en Pages : 216
Book Description
In semiconductor manufacturing, understanding how various materials behave and interact is critical to making a reliable and robust semiconductor package. Semiconductor Packaging: Materials Interaction and Reliability provides a fundamental understanding of the underlying physical properties of the materials used in a semiconductor package. By tying together the disparate elements essential to a semiconductor package, the authors show how all the parts fit and work together to provide durable protection for the integrated circuit chip within as well as a means for the chip to communicate with the outside world. The text also covers packaging materials for MEMS, solar technology, and LEDs and explores future trends in semiconductor packages.
Author: Cor Claeys Publisher: Elsevier ISBN: 008047490X Category : Science Languages : en Pages : 476
Book Description
Germanium is a semiconductor material that formed the basis for the development of transistor technology. Although the breakthrough of planar technology and integrated circuits put silicon in the foreground, in recent years there has been a renewed interest in germanium, which has been triggered by its strong potential for deep submicron (sub 45 nm) technologies. Germanium-Based technologies: From Materials to Devices is the first book to provide a broad, in-depth coverage of the field, including recent advances in Ge-technology and the fundamentals in material science, device physics and semiconductor processing. The contributing authors are international experts with a world-wide recognition and involved in the leading research in the field. The book also covers applications and the use of Ge for optoelectronics, detectors and solar cells. An ideal reference work for students and scientists working in the field of physics of semiconductor devices and materials, as well as for engineers in research centres and industry. Both the newcomer and the expert should benefit from this unique book. - State-of-the-art information available for the first time as an all-in-source - Extensive reference list making it an indispensable reference book - Broad coverage from fundamental aspects up to industrial applications
Author: Jacob Fraden Publisher: Springer Science & Business Media ISBN: 0387216049 Category : Technology & Engineering Languages : en Pages : 596
Book Description
Seven years have passed since the publication of the previous edition of this book. During that time, sensor technologies have made a remarkable leap forward. The sensitivity of the sensors became higher, the dimensions became smaller, the sel- tivity became better, and the prices became lower. What have not changed are the fundamental principles of the sensor design. They are still governed by the laws of Nature. Arguably one of the greatest geniuses who ever lived, Leonardo Da Vinci, had his own peculiar way of praying. He was saying, “Oh Lord, thanks for Thou do not violate your own laws. ” It is comforting indeed that the laws of Nature do not change as time goes by; it is just our appreciation of them that is being re?ned. Thus, this new edition examines the same good old laws of Nature that are employed in the designs of various sensors. This has not changed much since the previous edition. Yet, the sections that describe the practical designs are revised substantially. Recent ideas and developments have been added, and less important and nonessential designs were dropped. Probably the most dramatic recent progress in the sensor technologies relates to wide use of MEMS and MEOMS (micro-electro-mechanical systems and micro-electro-opto-mechanical systems). These are examined in this new edition with greater detail. This book is about devices commonly called sensors. The invention of a - croprocessor has brought highly sophisticated instruments into our everyday lives.
Author: Jay Prakash Gupta
Author: Jay Prakash Gupta
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Author: Swadesh Chaulya
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Author: Andrea Chen
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Author: Cor Claeys
Author: Jacob Fraden