Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 103 for “"fiber optics"”.
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Chemical sensing applications of fiber optics
… of this research is the implementation of a fiber optic sensor to measure refractive indices of unknown solutions. The surface plasmon sensor, interrogated with white light resulted in attenuations of light at different wavelengths when solutions of different refractive indices were …
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Overview of fiber optics technology: industrial and military
Fiber optics technology is being used in many applications, both in the military world and in the industrial world. A broad overview of this technology is provided, including a discussion of the fundamentals of fiber operation and component characteristics. Applications of fiber optics in both …
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Evolution of innovation : fiber optics and the communications industry
… in which they play. This thesis looks at fiber optic technologies and their impact on the communications industry. The relative importance of the fiber optic technology is evidenced by its speed and effectiveness in shaping the communications infrastructure in a short period of the recent …
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Eye Tracking Using Fiber Optics and Computer Vision Techniques
… velocity of the human eye using a combination of fiber optics and imaging optics integrated with a CCD camera, a framegrabber, and a PC. Systems such as the one we describe are needed for monitoring location of interest for better human-computer interfaces and virtual reality simulations, for …
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Fiber-Optics Based Pressure and Temperature Sensors for Harsh Environments
… distributed measurements unless combined with fiber-optic techniques. In general, fiber-optics provide many advantages over electrical based sensors and are the ideal choice for high temperature regimes and distributed sensing. In this thesis, preliminary designs and suggested future work are …
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Telecommunications in a new era of competition: Fiber optics, regulatory barriers, and competition
"The telecommunications industry has been affected by innovation and technological changes. Technological changes combined with judicial rulings and policy changes have led to a radical restructuring of the industry. The effects of restructuring on the firms, the consumers, and the role of …
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New Organic/inorganic Hybrid Sol-gel Nanocomposite Materials For Raman Gain In Fiber Optics
… and 1550 nm. Specifically, methods to amplify fiber optical data transmission in the regions where there is limited or no existing methods to achieve amplification is of interest in the chemistry and photonic communities. Raman gain is one method that has been proposed to passively amplify …
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In-situ cure monitoring and characterization of graphite/epoxy composites using fiber optics and ultrasonics
… minutes, exhibit no change. A state-of-the-art fiber-optic and ultrasonic cure processing monitoring system is developed, which consists of ultrasonic transducers with clad buffer rods, Extrinsic Fabry-Perot Interferometric fiber-optic sensors, and a special autoclave feedthrough. This system is …
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Applications of perfect difference codes in fiber-optics and wireless optical code-division multiplexing/multiple-access systems
After establishing itself in the radio domain, Spread spectrum code-division multiplexing/multiple-access (CDMA) has seen a recent upsurge in optical domain as well. Due to its fairness, flexibility, service differentiation and increased inherent security, CDMA is proved to be more suitable for the …
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Two Innovative Applications Combining Fiber Optics and High Power Pulsed Laser: Active Ultrasonic Based Structural Health Monitoring and Guided Laser Micromachining
This dissertation presents the exploration of two fiber optics techniques involving high power pulse laser delivery. The first research topic is "Embedded Active Fiber Optic Sensing Network for Structural Health Monitoring in Harsh Environments", which uses the fiber delivered pulse laser for …
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An approach to the estimation of life cycle costs of a fiber-optic application in military aircraft
As significant technological advances in fiber optics and optical data transmission methods are being made, it is necessary to develop appropriate methods for estimating life cycle costs for alternative coaxial/twisted pair wire and optical fiber avionics. Measures of effectiveness are suggested …
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Miniaturized 3--D Mapping System Using a Fiber Optic Coupler as a Young's Double Pinhole Interferometer
… of typical 3--D mapping systems. The use of fiber optics allows the miniaturization and simplification of many optical systems. This research used a fiber optic coupler to project a fringe pattern onto an object to be profiled. The two outputs fibers of the coupler were brought close together …
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Lighting a building with a single bulb : toward a system for illumination in the 21st c.; or, A centralized illumination system for the efficient decoupling and recovery of lighting related heat
… along with the illumination into the transport fibers, can be converted into visible radiation at the emitting end of the fiber, supplementing the light output. Fiber optics are used to carry information over long distances (actually encoded pulses of radiative IR), but certain fiber optics can …
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The use of chemiluminescence for the detection of temperature and fuel-to-air ratio in turbulent premixed flames
… and computer). An optical system using fiber optics and band pass interference filters was also investigated. The spectra of turbulent, premixed methane flames of known stoichiometry were recorded. A high temperature Pt-Pt10%Rh thermocouple was used to establish flame temperature. The …
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Understanding and developing capabilities for large area and continuous micro contact printing
… applications in printed organic electronics and fiber optics. However, problems like achieving precise alignment and registration, air bubble trapping and low production rate still remain unresolved. The goal of this thesis is to conceptualize and implement a low cost solution to these problems …
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MEMS enabled Fabry-Perot cavity for cQED experiments
… micro cavity consisting of a micro mirror and a fiber optics cable are; alignment between them to form a small cavity volume and actuation to allow for adjusment of the cavity length. In this Master thesis the fabrication of 1-D v-shape or chevron thermal actuator is proposed based on the …
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Multidisciplinary system design optimization of fiber-optic networks within data centers
… a new analytical systems approach to modeling fiber-optic network design within data centers. Multidisciplinary system design optimization (MSDO) is utilized to integrate seven disciplines into a unified software framework for modeling 10G, 40G, and 100G multi-mode fiber-optics networks: 1) …
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Development of a Miniature, Semi-Distributed Sapphire Fiber Optic Thermometer for Harsh and High Temperature Environments
Fiber optic temperature sensing has become a well-defined field in the past few decades [1] through the use of Fiber Bragg Gratings, Fabry-Perot interferometry, and pyrometry, to list several techniques in use today. The use of fiber optics offers significant advantages over electronic sensing in …
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Application of base station with array of intelligent antennas in the energy distribution sector
… is more reliable than 3G/4G and cheaper than fiber optics. In this context, it is of utmost importance to have a more efficient Base Transceiver Station (BTS) that can cover the communication of a larger area. In this work, the mathematical concepts of an intelligent antenna array, as well as …
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Minimum-delay HF communications
… communications offer latency advantages over fiber-optics and are more economical than satellite links in long-distance communication applications. As a result, there is renewed interest in the field of HF from the high-frequency trading industry, as a means of transmitting financial data. …
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