Download or read book Integrated Photonic Devices for Electromagnetic Wave Sensing Optical True Time Delay and Trace Gas Sensing written by Chi-Jui Chung and published by . This book was released on 2018 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrated Photonic Devices for Trace Gas Sensing and Spectroscopy written by Ali Rostamian and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To keep pace with the ever-increasing demand of integration and miniaturization, it is imperative to redesign conventional optical systems and components and develop new compact ones. Optical spectrometers have been widely adopted as powerful analytical tools showcased by a plethora of applications ranging from medical diagnostics and food analysis to gas and bio-agent sensing and environmental monitoring. Conventional spectroscopy tools require bulky and expensive optical elements, with electronics that result in benchtop systems with limited scope for portability. On-chip spectrometers, on the other hand, are alignment-free and lightweight devices that, unlike their commercially available off-chip counterparts, offer sensing in portable applications and make at-the-sample analysis possible. In this dissertation, chip-scale optical spectrometers with different working principles are studied and implemented. First, an efficient mid-infrared polarization rotator in silicon-on-sapphire is experimentally demonstrated. Since the emission from quantum cascade laser sources is transverse magnetic polarized, this component can be used to convert the polarization state of the light source and couple it into transverse electric photonic components. In chapter 3, we experimentally demonstrate an on-chip Ethyl alcohol sensor based on a holey photonic crystal waveguide on a silicon on insulator platform, offering an enhanced absorption enabled by a slow-light mode and enhanced optical field intensities in the waveguide. In chapter 4, a surface-normal hollow-core photonic crystal waveguide sensor is introduced with a geometry similar to photonic bandgap fibers with perfectly periodic air holes as cladding in a 2-dimensional photonic crystal arrangement that gives rise to bandgaps at specific frequencies and a central defect for strong modal field confinement. On account of the slow-light effect, this device offers a high degree of dispersion control and can be employed for multi-gas detection. Finally, in chapter 5, we present two different devices with single channel geometries that can be used for on-chip spectroscopy. In the first part of this chapter, we present the design and implementation of a cascaded microring-MZI device as a platform for Fourier transform spectroscopy in O-band. In the second part, we demonstrate a device with finely tunable cascaded microdisks offering a platform for on-chip spectroscopy in C-band. Optical devices presented in this dissertation provide a path toward high-performance integrated spectrometers with subcentimeter-scale footprints that enable handheld spectral analysis and more real-life applications
Download or read book Integrated Photonic Devices for Spectroscopic Chemical Detection written by Derek Matthew Kita and published by . This book was released on 2020 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical sensing systems realized with photonic components integrated on traditional semiconductor substrates have emerged as a promising technology for remote sensing applications that require low cost, low power consumption, light weight, small size, and high-performance. In this thesis, I discuss methods and systems for practical implementations of chip-scale integrated photonic chemical sensors and spectrometers. The work focuses on solutions to a variety of obstacles that have hindered real-world implementations of microphotonic chemical sensors. First, a new chip architecture capable of acquiring high channel count, high resolution optical spectra (200 pm resolution in the telecommunications C-band) is presented both theoretically and experimentally, along with a new 'elastic-D1' regularized regression method for spectrum reconstruction. Next, evanescent field sensing using dielectric waveguides is studied theoretically and numerically, with a special emphasis on sensing performance in the presence of random, fabrication-induced waveguide sidewall roughness. I demonstrate that a locally flat perturbation approximation is valid for typical experimental roughness in silicon-on-insulator platforms, and use a volume-current method to explicitly compute scattering loss rates for a variety of three-dimensional waveguide structures. To then experimentally realize photonic sensing systems, I developed a low-loss (0.36 ± 0.11 dB/cm), quick-turn (16.4 day turnaround) fabrication process for inexpensively prototyping silicon nitride photonic integrated circuits with heaters, etched edge couplers, and opened sensing windows. Using this fabrication process, I present a successful experimental demonstration of a fiber-packaged, waveguideenhanced Raman spectroscopic sensor used for detecting liquids in contact with the surface of the chip via measured Raman peaks from 500 - 3500 cm−1.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Radar written by National Research Council and published by National Academies Press. This book was released on 2014-03-14 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today's world, the range of technologies with the potential to threaten the security of U.S. military forces is extremely broad. These include developments in explosive materials, sensors, control systems, robotics, satellite systems, and computing power, to name just a few. Such technologies have not only enhanced the capabilities of U.S. military forces, but also offer enhanced offensive capabilities to potential adversaries - either directly through the development of more sophisticated weapons, or more indirectly through opportunities for interrupting the function of defensive U.S. military systems. Passive and active electro-optical (EO) sensing technologies are prime examples. Laser Radar considers the potential of active EO technologies to create surprise; i.e., systems that use a source of visible or infrared light to interrogate a target in combination with sensitive detectors and processors to analyze the returned light. The addition of an interrogating light source to the system adds rich new phenomenologies that enable new capabilities to be explored. This report evaluates the fundamental, physical limits to active EO sensor technologies with potential military utility; identifies key technologies that may help overcome the impediments within a 5-10 year timeframe; considers the pros and cons of implementing each existing or emerging technology; and evaluates the potential uses of active EO sensing technologies, including 3D mapping and multi-discriminate laser radar technologies.
Download or read book Quantum Photonics Pioneering Advances and Emerging Applications written by Robert W. Boyd and published by Springer. This book was released on 2019-02-27 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together reviews by internationally renowed experts on quantum optics and photonics. It describes novel experiments at the limit of single photons, and presents advances in this emerging research area. It also includes reprints and historical descriptions of some of the first pioneering experiments at a single-photon level and nonlinear optics, performed before the inception of lasers and modern light detectors, often with the human eye serving as a single-photon detector. The book comprises 19 chapters, 10 of which describe modern quantum photonics results, including single-photon sources, direct measurement of the photon's spatial wave function, nonlinear interactions and non-classical light, nanophotonics for room-temperature single-photon sources, time-multiplexed methods for optical quantum information processing, the role of photon statistics in visual perception, light-by-light coherent control using metamaterials, nonlinear nanoplasmonics, nonlinear polarization optics, and ultrafast nonlinear optics in the mid-infrared.
Download or read book Silicon Photonics II written by David J. Lockwood and published by Springer Science & Business Media. This book was released on 2010-10-13 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is volume II of a series of books on silicon photonics. It gives a fascinating picture of the state-of-the-art in silicon photonics from a component perspective. It presents a perspective on what can be expected in the near future. It is formed from a selected number of reviews authored by world leaders in the field, and is written from both academic and industrial viewpoints. An in-depth discussion of the route towards fully integrated silicon photonics is presented. This book will be useful not only to physicists, chemists, materials scientists, and engineers but also to graduate students who are interested in the fields of micro- and nanophotonics and optoelectronics.
Download or read book Photons Plus Ultrasound written by Alexander A. Oraevsky and published by . This book was released on 2012 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes Proceedings Vol. 7821
Download or read book Smart Sensor Systems written by Gerard Meijer and published by John Wiley & Sons. This book was released on 2014-04-02 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from an internationally-renowned group of experts, this book uses a multidisciplinary approach to review recent developments in the field of smart sensor systems, covering important system and design aspects. It examines topics over the whole range of sensor technology from the theory and constraints of basic elements, physics and electronics, up to the level of application-orientated issues. Developed as a complementary volume to ‘Smart Sensor Systems’ (Wiley 2008), which introduces the basics of smart sensor systems, this volume focuses on emerging sensing technologies and applications, including: State-of-the-art techniques for designing smart sensors and smart sensor systems, including measurement techniques at system level, such as dynamic error correction, calibration, self-calibration and trimming. Circuit design for sensor systems, such as the design of precision instrumentation amplifiers. Impedance sensors, and the associated measurement techniques and electronics, that measure electrical characteristics to derive physical and biomedical parameters, such as blood viscosity or growth of micro-organisms. Complete sensor systems-on-a-chip, such as CMOS optical imagers and microarrays for DNA detection, and the associated circuit and micro-fabrication techniques. Vibratory gyroscopes and the associated electronics, employing mechanical and electrical signal amplification to enable low-power angular-rate sensing. Implantable smart sensors for neural interfacing in bio-medical applications. Smart combinations of energy harvesters and energy-storage devices for autonomous wireless sensors. Smart Sensor Systems: Emerging Technologies and Applications will greatly benefit final-year undergraduate and postgraduate students in the areas of electrical, mechanical and chemical engineering, and physics. Professional engineers and researchers in the microelectronics industry, including microsystem developers, will also find this a thorough and useful volume.
Download or read book Technology for the United States Navy and Marine Corps 2000 2035 written by and published by National Academies. This book was released on 1997 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future national security environment will present the naval forces with operational challenges that can best be met through the development of military capabilities that effectively leverage rapidly advancing technologies in many areas. The panel envisions a world where the naval forces will perform missions in the future similar to those they have historically undertaken. These missions will continue to include sea control, deterrence, power projection, sea lift, and so on. The missions will be accomplished through the use of platforms (ships, submarines, aircraft, and spacecraft), weapons (guns, missiles, bombs, torpedoes, and information), manpower, materiel, tactics, and processes (acquisition, logistics, and so on.). Accordingly, the Panel on Technology attempted to identify those technologies that will be of greatest importance to the future operations of the naval forces and to project trends in their development out to the year 2035. The primary objective of the panel was to determine which are the most critical technologies for the Department of the Navy to pursue to ensure U.S. dominance in future naval operations and to determine the future trends in these technologies and their impact on Navy and Marine Corps superiority. A vision of future naval operations ensued from this effort. These technologies form the base from which products, platforms, weapons, and capabilities are built. By combining multiple technologies with their future attributes, new systems and subsystems can be envisioned. Technology for the United States Navy and Marine Corps, 2000-2035 Becoming a 21st-Century Force: Volume 2: Technology indentifies those technologies that are unique to the naval forces and whose development the Department of the Navy clearly must fund, as well as commercially dominated technologies that the panel believes the Navy and Marine Corps must learn to adapt as quickly as possible to naval applications. Since the development of many of the critical technologies is becoming global in nature, some consideration is given to foreign capabilities and trends as a way to assess potential adversaries' capabilities. Finally, the panel assessed the current state of the science and technology (S&T) establishment and processes within the Department of the Navy and makes recommendations that would improve the efficiency and effectiveness of this vital area. The panel's findings and recommendations are presented in this report.
Download or read book Electromagnetic Noise and Quantum Optical Measurements written by Hermann A. Haus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the reviews: "Haus’ book provides numerous insights on topics of wide importance, and contains much material not available elsewhere in book form. [...] an indispensable resource for those working in quantum optics or electronics." Optics & Photonics News
Download or read book Fundamentals and Applications of Nanophotonics written by Joseph W. Haus and published by Woodhead Publishing. This book was released on 2016-01-09 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals and Applications of Nanophotonics includes a comprehensive discussion of the field of nanophotonics, including key enabling technologies that have the potential to drive economic growth and impact numerous application domains such as ICT, the environment, healthcare, military, transport, manufacturing, and energy. This book gives readers the theoretical underpinnings needed to understand the latest advances in the field. After an introduction to the area, chapters two and three cover the essential topics of electrodynamics, quantum mechanics, and computation as they relate to nanophotonics. Subsequent chapters explore materials for nanophotonics, including nanoparticles, photonic crystals, nanosilicon, nanocarbon, III-V, and II-VI semiconductors. In addition, fabrication and characterization techniques are addressed, along with the importance of plasmonics, and the applications of nanophotonics in devices such as lasers, LEDs, and photodetectors. - Covers electrodynamics, quantum mechanics and computation as these relate to nanophotonics - Reviews materials, fabrication and characterization techniques for nanophotonics - Describes applications of the technology such as lasers, LEDs and photodetectors
Download or read book Optical Engineering written by and published by . This book was released on 1997 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
Download or read book Optical Microresonators written by John Heebner and published by Springer Science & Business Media. This book was released on 2008 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Micro-Resonators are an exciting new field of research that has gained prominence in the past few years due to the emergence of new fabrication technologies. This book is the first detailed text on the theory, fabrication, and applications of optical micro-resonators, and will be found useful by both graduate students and researchers in the field.
Download or read book Optics in Our Time written by Mohammad D. Al-Amri and published by Springer. This book was released on 2016-12-12 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light and light based technologies have played an important role in transforming our lives via scientific contributions spanned over thousands of years. In this book we present a vast collection of articles on various aspects of light and its applications in the contemporary world at a popular or semi-popular level. These articles are written by the world authorities in their respective fields. This is therefore a rare volume where the world experts have come together to present the developments in this most important field of science in an almost pedagogical manner. This volume covers five aspects related to light. The first presents two articles, one on the history of the nature of light, and the other on the scientific achievements of Ibn-Haitham (Alhazen), who is broadly considered the father of modern optics. These are then followed by an article on ultrafast phenomena and the invisible world. The third part includes papers on specific sources of light, the discoveries of which have revolutionized optical technologies in our lifetime. They discuss the nature and the characteristics of lasers, Solid-state lighting based on the Light Emitting Diode (LED) technology, and finally modern electron optics and its relationship to the Muslim golden age in science. The book’s fourth part discusses various applications of optics and light in today's world, including biophotonics, art, optical communication, nanotechnology, the eye as an optical instrument, remote sensing, and optics in medicine. In turn, the last part focuses on quantum optics, a modern field that grew out of the interaction of light and matter. Topics addressed include atom optics, slow, stored and stationary light, optical tests of the foundation of physics, quantum mechanical properties of light fields carrying orbital angular momentum, quantum communication, and Wave-Particle dualism in action.
Download or read book Handbook of Modern Sensors written by Jacob Fraden and published by Springer Science & Business Media. This book was released on 2006-04-29 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Advanced Sensors for Real Time Monitoring Applications written by Olga Korostynska and published by MDPI. This book was released on 2021-03-09 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is impossible to imagine the modern world without sensors, or without real-time information about almost everything—from local temperature to material composition and health parameters. We sense, measure, and process data and act accordingly all the time. In fact, real-time monitoring and information is key to a successful business, an assistant in life-saving decisions that healthcare professionals make, and a tool in research that could revolutionize the future. To ensure that sensors address the rapidly developing needs of various areas of our lives and activities, scientists, researchers, manufacturers, and end-users have established an efficient dialogue so that the newest technological achievements in all aspects of real-time sensing can be implemented for the benefit of the wider community. This book documents some of the results of such a dialogue and reports on advances in sensors and sensor systems for existing and emerging real-time monitoring applications.
