Download or read book Direct UV written Bragg Gratings for Waveguide Characterisation and Advanced Applications written by Helen L. Rogers and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct UV writing is an established fabrication technique allowing channel waveguides and photonic circuits to be defined in a photosensitive glass via an inscription method. A related technique, direct grating writing, enables Bragg grating structures to be defined in an interferometric dual beam set up, with definition of Bragg grating planes achieved via the periodic modulation of the interference pattern between the beams. A decade of prior work investigating the technique has led to devices for use in sensing, telecommunications, lasing and amplification applications. A requirement for greater understanding of the propagation characteristics of the waveguides has been identified, in order to maximise the effciency and effectiveness of these devices. In this thesis, a propagation loss measurement technique and a wavelength-dependent dispersion measurement technique are presented. Both depend on the presence of integrated Bragg grating structures which enable the propagation characteristics of the waveguides to be investigated. The loss measurement technique involves measurement of the Bragg grating strength, whilst the dispersion measurement technique enables the effective refractive index of the waveguide to be inferred from a measurement of reflected central grating wavelength. Applications of both techniques in a variety of situations have been investigated, with devices fabricated for use in quantum technologies and cold matter experiments amongst those produced.
Download or read book Waveguide Structuring and Bragg Grating Fabrication by Ultraviolet Light Induced Refractive Index Changes in Photosensitive Optical Materials written by Frank Knappe and published by Cuvillier Verlag. This book was released on 2007 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UV Writing of Advanced Bragg Gratings in Optical Waveguides written by Jesper Bo Damm Jensen and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bragg Grating Waveguide Devices written by Haibin Zhang and published by . This book was released on 2007 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last 10 years, developments in the field of ultrashort laser material processing have led to the demonstrations of numerous three dimensional photonic devices directly written inside transparent materials. However, a roadblock still exists for the commercialization of such direct writing technology, owing to a lack of effective means for inscribing high-quality Bragg gratings inside laser written waveguides that are critical for multi-functional integrated devices in optical sensing and telecom. In this thesis, for the first time, a new Bragg grating waveguide device is proposed and then fabricated directly inside transparent glass materials using the ultrashort laser direct writing technology. These Bragg grating waveguide devices are composed of arrays of partially overlapped refractive index voxels (volume pixels), which simultaneously offer low-loss light guiding and strong Bragg resonances. Two novel methods, a single-pulse writing method and a burst writing method, are introduced and each successfully demonstrated for inscribing the grating waveguide devices with respective low and high repetition rate ultrashort laser systems. Laser fabrication parameters are optimized for both methods to generate three-dimensional high-strength (>35 dB) Bragg grating waveguides with narrow-bandwidth (0.2 nm) Bragg responses tunable in the 1550-nm telecom band. Moreover, several applications of such Bragg grating waveguides are demonstrated. Thermal annealing experiments show extremely high device stability under high temperature of 500°C. Wavelength tuning and cascading of the Bragg grating waveguides are easily achieved by adjusting the laser scan velocities. A chirped Bragg grating waveguide is demonstrated that targets broadband power tap and dispersion compensation applications in telecom. At last, a distributed grating network is fabricated demonstrating unique capabilities of three-dimensional sensing of temperature, stress, and bending. These high-quality devices are the first demonstrations of high strength first order Bragg gratings inside laser written waveguides. The results of this thesis may have direct impact on fabricating novel three-dimensional devices for telecom, sensing, and biophotonics lab-on-a-chip applications.
Download or read book Bragg Gratings Photosensitivity and Poling in Glass Fibers and Waveguides written by and published by . This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bragg Gratings Photosensitivity and Poling in Glass Fibers and Waveguides written by and published by . This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UV Written Bragg Gratings in Optical Fibres and Planar Waveguides written by Ganesharajah Ganeshkumar and published by . This book was released on 2002 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bragg Gratings in Semiconductor Waveguides written by Stephan Pachnicke and published by GRIN Verlag. This book was released on 2007-08 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2001 in the subject Electrotechnology, grade: with distinction, City University London, 50 entries in the bibliography, language: English, abstract: Bragg gratings are important devices for both optical communications and sensing. These devices are used to design very narrow band optical filters, which can be used in wavelength division multiplexing (WDM). It is also perceived that Bragg gratings will be used to compensate the dispersion in modern fibre optic telecommunication networks. Semiconductor gratings are usually integrated into lasers to control the operating wavelength. City University Photonic Modelling Group is a world leading research group on the use of rigorous numerical techniques to design and optimise advanced photonic devices for optical communications. The research group has already achieved results on hypothetical one-dimensional (1-D) and realistic two-dimensional (2-D) structures. In this project a combination of three numerical methods has been used, all of which are rigorous, to simulate realistic three-dimensional (3-D) structures in semiconductor waveguides. The combination of these three accurate methods, the finite element method (FEM), the least squares boundary residual (LSBR) method and the transfer matrix method (TMM) turned out to be superior to the widely used coupled mode theory (CMT). The numerical study of different Bragg gratings shows interesting dependencies of the characteristics of the gratings on the different design parameters. The work was carried out for different mesh distributions, different numbers of mesh divisions and different computational parameters. Another focus of the work was on the stability of the transmission and reflection coefficients obtained from the LSBR program. Furthermore the effect of inaccuracy occurring during the fabrication process has been studied. The results of this work have been compared to results found by other groups and fellows. We can say that this proj
Download or read book Design and UV Writing of Advanced Bragg Gratings in Optical Fibers written by Nikolai Plougmann and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Materials for Integrated Optical Waveguides written by Xingcun Colin Tong Ph.D and published by Springer Science & Business Media. This book was released on 2013-10-17 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive introduction to integrated optical waveguides for information technology and data communications. Integrated coverage ranges from advanced materials, fabrication, and characterization techniques to guidelines for design and simulation. A concluding chapter offers perspectives on likely future trends and challenges. The dramatic scaling down of feature sizes has driven exponential improvements in semiconductor productivity and performance in the past several decades. However, with the potential of gigascale integration, size reduction is approaching a physical limitation due to the negative impact on resistance and inductance of metal interconnects with current copper-trace based technology. Integrated optics provides a potentially lower-cost, higher performance alternative to electronics in optical communication systems. Optical interconnects, in which light can be generated, guided, modulated, amplified, and detected, can provide greater bandwidth, lower power consumption, decreased interconnect delays, resistance to electromagnetic interference, and reduced crosstalk when integrated into standard electronic circuits. Integrated waveguide optics represents a truly multidisciplinary field of science and engineering, with continued growth requiring new developments in modeling, further advances in materials science, and innovations in integration platforms. In addition, the processing and fabrication of these new devices must be optimized in conjunction with the development of accurate and precise characterization and testing methods. Students and professionals in materials science and engineering will find Advanced Materials for Integrated Optical Waveguides to be an invaluable reference for meeting these research and development goals.
Download or read book Direct UV Written Planar Bragg Gratings that Feature Zero Fluence Induced Birefringence written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct UV written Waveguide Devices written by Faisal Rafiq Mahamd Adikan and published by . This book was released on 2007 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automated Waveguide Alignment and Direct UV Writing Systems for Integrated Optical Devices Fabrication and Characterization written by Chin Chong Tan and published by . This book was released on 2010 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Optoelectronics Two Volume Set written by John P. Dakin and published by CRC Press. This book was released on 2010-12-12 with total page 1616 pages. Available in PDF, EPUB and Kindle. Book excerpt: A field as diverse as optoelectronics needs a reference that is equally versatile. From basic physics and light sources to devices and state-of-the-art applications, the Handbook of Optoelectronics provides comprehensive, self-contained coverage of fundamental concepts and practical applications across the entire spectrum of disciplines encompassed by optoelectronics. The handbook unifies a broad array of current research areas with a forward-looking focus on systems and applications. Beginning with an introduction to the relevant principles of physics, materials science, engineering, and optics, the book explores the details of optoelectronic devices and techniques including semiconductor lasers, optical detectors and receivers, optical fiber devices, modulators, amplifiers, integrated optics, LEDs, and engineered optical materials. Applications and systems then become the focus, with sections devoted to industrial, medical, and commercial applications, communications, imaging and displays, sensing and data processing, spectroscopic analysis, the art of practical optoelectronics, and future prospects. This extensive resource comprises the efforts of more than 70 world-renowned experts from leading industrial and academic institutions around the world and includes many references to contemporary works. Whether used as a field reference, as a research tool, or as a broad and self-contained introduction to the field, the Handbook of Optoelectronics places everything you need in a unified, conveniently organized format.
Download or read book Fiber Bragg Gratings written by Andreas Othonos and published by Artech House Publishers. This book was released on 1999 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber Bragg gratings are flexible, cost-effective and highly efficient, with a vast range of potential applications. This timely new work provides a comprehensive description of the principles and practical applications of this latest technology, which has the potential to revolutionize telecommunications and significantly impact optical fiber sensing. Here the authors explain the underlying physics and practical aspects in a clear and unambiguous manner.
Download or read book Handbook of Advanced Electronic and Photonic Materials and Devices Nonlinear optical materials written by Hari Singh Nalwa and published by . This book was released on 2001 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronic and photonic materials discussed in this handbook are the key elements of continued scientific and technological advances in the 21st century. The electronic and photonic materials comprising this handbook include semiconductors, superconductors, ferroelectrics, liquid crystals, conducting polymers, organic and superconductors, conductors, nonlinear optical and optoelectronic materials, electrochromic materials, laser materials, photoconductors, photovoltaic and electroluminescent materials, dielectric materials, nanostructured materials, supramolecular and self-asemblies, silicon and glasses, photosynthetic and respiratory proteins, etc, etc. Some of these materials have already been used and will be the most important components of the semiconductor and photonic industries, computers, internet, information processing and storage, telecommunications, satellite communications, integrated circuits, photocopiers, solar cells, batteries, light-emitting diodes, liquid crystal displays, magneto-optic memories, audio and video systems, recordable compact discs, video cameras, X-ray technology, color imaging, printing, flat-panel displays, optical waveguides, cable televisions, computer chips, molecular-sized transistors and switches, as well as other emerging cutting edge technologies. Electronic and photonic materials are expected to grow to a trillion-dollar industry in the new millennium and will be the most dominating forces in the emerging new technologies in the fields of science and engineering. This handbook is a unique source of the in-depth knowledge of synthesis, processing, fabrication, spectroscopy, physical properties and applications of electronic and photonic materials covering everything for today's and developing future technologies. This handbook consists of over one hundred state-of-the-art review chapters written by more than 200 world leading experts from 25 different countries. With more than 23,000 bibliographic citations and several thousands of figures, tables, photographs, chemical structures and equations, this handbook is an invaluable major reference source for scientists and students working in the field of materials science, solid-state physics, chemistry, electrical and optical engineering, polymer science, device engineering and computational engineering, photophysics, data storage and information technology and technocrats, everyone who is involved in science and engineering of electronic and photonic materials. Key Features * This is the first handbook ever published on electronic and photonic materials * 10 volumes summarize the advances in electronic and photonic materials made over past the two decades * This handbook is a unique source of the in-depth knowledge of synthesis, processing, spectroscopy, physical properties and applications of electronic and photonic materials * Over 100 state-of-the-art review chapters written by more than 200 leading experts from 25 different countries * About 25,000 bibliographic citations and several thousand figures, tables, photographs, chemical structures and equations * Easy access to electronic and photonic materials from a single reference * Each chapter is self-contained with cross references * Single reference having all inorganic, organic and biological materials * Witten in very clear and concise fashion for easy understanding of structure property relationships in electronic and photonic materials
Download or read book Wavelength Filters in Fibre Optics written by Herbert Venghaus and published by Springer. This book was released on 2006-09-21 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book dedicated to wavelength filters for fibre optics. It provides a comprehensive account of the principles and applications of such filters, including their technological realizations. It explains the relevant performance parameters, the particular advantages and shortcomings of the various concepts and components, and the preferred applications. There is also in-depth information on the characteristics of commercially available devices.
