Author: Hideyuki Sakai
Publisher: World Scientific
ISBN: 9814544752
Category :
Languages : en
Pages : 538
Book Description
This book focuses on a new development of spin giant resonances in nuclei. It covers: quenching phenomena in Gamow-Teller giant resonances, spin-dipole giant resonances, spin-longitudinal and transverse responses in quasi-elastic scattering, microscopic structures, isoscalar spin responses, and spin excitations in exotic nuclei as well as in related fields. The book provides comprehensive coverage of theory and experiment on intriguing spin phenomena, by distinguished contributors.
New Facet Of Spin Giant Resonances In Nuclei (Sgr97) - Proceedings Of The International Symposium
Author: Hideyuki Sakai
Publisher: World Scientific
ISBN: 9814544752
Category :
Languages : en
Pages : 538
Book Description
This book focuses on a new development of spin giant resonances in nuclei. It covers: quenching phenomena in Gamow-Teller giant resonances, spin-dipole giant resonances, spin-longitudinal and transverse responses in quasi-elastic scattering, microscopic structures, isoscalar spin responses, and spin excitations in exotic nuclei as well as in related fields. The book provides comprehensive coverage of theory and experiment on intriguing spin phenomena, by distinguished contributors.
Publisher: World Scientific
ISBN: 9814544752
Category :
Languages : en
Pages : 538
Book Description
This book focuses on a new development of spin giant resonances in nuclei. It covers: quenching phenomena in Gamow-Teller giant resonances, spin-dipole giant resonances, spin-longitudinal and transverse responses in quasi-elastic scattering, microscopic structures, isoscalar spin responses, and spin excitations in exotic nuclei as well as in related fields. The book provides comprehensive coverage of theory and experiment on intriguing spin phenomena, by distinguished contributors.
Mid-infrared Optoelectronics
Author: Eric Tournié
Publisher: Woodhead Publishing
ISBN: 0081027389
Category : Technology & Engineering
Languages : en
Pages : 754
Book Description
Mid-infrared Optoelectronics: Materials, Devices, and Applications addresses the new materials, devices and applications that have emerged over the last decade, along with exciting areas of research. Sections cover fundamentals, light sources, photodetectors, new approaches, and the application of mid-IR devices, with sections discussing LEDs, laser diodes, and quantum cascade lasers, mid-infrared optoelectronics, emerging research areas, dilute bismide and nitride alloys, Group-IV materials, gallium nitride heterostructures, and new nonlinear materials. Finally, the most relevant applications of mid-infrared devices are reviewed in industry, gas sensing, spectroscopy, and imaging. This book presents a key reference for materials scientists, engineers and professionals working in R&D in the area of semiconductors and optoelectronics. - Provides a comprehensive overview of mid-infrared photodetectors and light sources and the latest materials and devices - Reviews emerging areas of research in the field of mid-infrared optoelectronics, including new materials, such as wide bandgap materials, chalcogenides and new approaches, like heterogeneous integration - Includes information on the most relevant applications in industry, like gas sensing, spectroscopy and imaging
Publisher: Woodhead Publishing
ISBN: 0081027389
Category : Technology & Engineering
Languages : en
Pages : 754
Book Description
Mid-infrared Optoelectronics: Materials, Devices, and Applications addresses the new materials, devices and applications that have emerged over the last decade, along with exciting areas of research. Sections cover fundamentals, light sources, photodetectors, new approaches, and the application of mid-IR devices, with sections discussing LEDs, laser diodes, and quantum cascade lasers, mid-infrared optoelectronics, emerging research areas, dilute bismide and nitride alloys, Group-IV materials, gallium nitride heterostructures, and new nonlinear materials. Finally, the most relevant applications of mid-infrared devices are reviewed in industry, gas sensing, spectroscopy, and imaging. This book presents a key reference for materials scientists, engineers and professionals working in R&D in the area of semiconductors and optoelectronics. - Provides a comprehensive overview of mid-infrared photodetectors and light sources and the latest materials and devices - Reviews emerging areas of research in the field of mid-infrared optoelectronics, including new materials, such as wide bandgap materials, chalcogenides and new approaches, like heterogeneous integration - Includes information on the most relevant applications in industry, like gas sensing, spectroscopy and imaging
A Practical Guide to Handling Laser Diode Beams
Author: Haiyin Sun
Publisher: Springer
ISBN: 9401797838
Category : Science
Languages : en
Pages : 147
Book Description
This book offers the reader a practical guide to the control and characterization of laser diode beams. Laser diodes are the most widely used lasers, accounting for 50% of the global laser market. Correct handling of laser diode beams is the key to the successful use of laser diodes, and this requires an in-depth understanding of their unique properties. Following a short introduction to the working principles of laser diodes, the book describes the basics of laser diode beams and beam propagation, including Zemax modeling of a Gaussian beam propagating through a lens. The core of the book is concerned with laser diode beam manipulations: collimating and focusing, circularization and astigmatism correction, coupling into a single mode optical fiber, diffractive optics and beam shaping, and manipulation of multi transverse mode beams. The final chapter of the book covers beam characterization methods, describing the measurement of spatial and spectral properties, including wavelength and linewidth measurement techniques. The book is a significantly revised and expanded version of the title Laser Diode Beam Basics, Manipulations and Characterizations by the same author. New topics introduced in this volume include: laser diode types and working principles, non-paraxial Gaussian beam, Zemax modeling, numerical analysis of a laser diode beam, spectral property characterization methods, and power and energy characterization techniques. The book approaches the subject in a practical way with mathematical content kept to the minimum level required, making the book a convenient reference for laser diode users.
Publisher: Springer
ISBN: 9401797838
Category : Science
Languages : en
Pages : 147
Book Description
This book offers the reader a practical guide to the control and characterization of laser diode beams. Laser diodes are the most widely used lasers, accounting for 50% of the global laser market. Correct handling of laser diode beams is the key to the successful use of laser diodes, and this requires an in-depth understanding of their unique properties. Following a short introduction to the working principles of laser diodes, the book describes the basics of laser diode beams and beam propagation, including Zemax modeling of a Gaussian beam propagating through a lens. The core of the book is concerned with laser diode beam manipulations: collimating and focusing, circularization and astigmatism correction, coupling into a single mode optical fiber, diffractive optics and beam shaping, and manipulation of multi transverse mode beams. The final chapter of the book covers beam characterization methods, describing the measurement of spatial and spectral properties, including wavelength and linewidth measurement techniques. The book is a significantly revised and expanded version of the title Laser Diode Beam Basics, Manipulations and Characterizations by the same author. New topics introduced in this volume include: laser diode types and working principles, non-paraxial Gaussian beam, Zemax modeling, numerical analysis of a laser diode beam, spectral property characterization methods, and power and energy characterization techniques. The book approaches the subject in a practical way with mathematical content kept to the minimum level required, making the book a convenient reference for laser diode users.
Report on Tunable Lasers
Author:
Publisher: Information Gatekeepers Inc
ISBN: 1568512074
Category :
Languages : en
Pages : 34
Book Description
Publisher: Information Gatekeepers Inc
ISBN: 1568512074
Category :
Languages : en
Pages : 34
Book Description
WDM Technologies: Active Optical Components
Author: Masahiko Fujiwara
Publisher: Elsevier
ISBN: 0080481698
Category : Technology & Engineering
Languages : en
Pages : 703
Book Description
WDM Technologies: Active Optical Components is an excellent resource for engineers and researchers engaged in all aspects of fiber optics communication, such as, optoelectronics, equipment/system design, and manufacturing. The book is also a resource for graduate students and scholars interested in these rapidly growing fields. - Provides the reader with insight and understanding for key active optical components frequently being / to be used in the optical communication systems, essential building blocks of today's/next generation fiber optic networks - Allows engineers working in optical communication area, (from system to component) to understand the principle and mechanics of each key component they deal with for optical system design - Covers different laser diodes as transmitter and pumping sources, different modulators, and different photodetectors
Publisher: Elsevier
ISBN: 0080481698
Category : Technology & Engineering
Languages : en
Pages : 703
Book Description
WDM Technologies: Active Optical Components is an excellent resource for engineers and researchers engaged in all aspects of fiber optics communication, such as, optoelectronics, equipment/system design, and manufacturing. The book is also a resource for graduate students and scholars interested in these rapidly growing fields. - Provides the reader with insight and understanding for key active optical components frequently being / to be used in the optical communication systems, essential building blocks of today's/next generation fiber optic networks - Allows engineers working in optical communication area, (from system to component) to understand the principle and mechanics of each key component they deal with for optical system design - Covers different laser diodes as transmitter and pumping sources, different modulators, and different photodetectors
Polarized Beams And Polarized Gas Targets: Proceedings Of The International Workshop
Author: Hans Paetz Gen Schieck
Publisher: World Scientific
ISBN: 9814548030
Category :
Languages : en
Pages : 478
Book Description
The International Workshop on Polarized Beams and Polarized Gas Targets was held in Cologne, Germany from June 6 to 9, 1995 as the last in a series held at 2-3 years intervals. It was attended by about 110 scientists; there were 47 invited and contributed talks, 5 round-table discussions and 17 poster contributions, all of which will appear as a written contribution in the Proceedings. The main subjects were Optically-Pumped Polarized Targets, Polarized Electron Sources, Atomic-Beam Polarized-Ion Sources, Optically-Pumped Polarized Ion Sources, Targets and Storage Rings. Significant progress and latest developments in this field were covered as well as future developments both from the technical, but also from the physics aspects.
Publisher: World Scientific
ISBN: 9814548030
Category :
Languages : en
Pages : 478
Book Description
The International Workshop on Polarized Beams and Polarized Gas Targets was held in Cologne, Germany from June 6 to 9, 1995 as the last in a series held at 2-3 years intervals. It was attended by about 110 scientists; there were 47 invited and contributed talks, 5 round-table discussions and 17 poster contributions, all of which will appear as a written contribution in the Proceedings. The main subjects were Optically-Pumped Polarized Targets, Polarized Electron Sources, Atomic-Beam Polarized-Ion Sources, Optically-Pumped Polarized Ion Sources, Targets and Storage Rings. Significant progress and latest developments in this field were covered as well as future developments both from the technical, but also from the physics aspects.
Official Gazette of the United States Patent and Trademark Office
Author: United States. Patent and Trademark Office
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 1156
Book Description
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 1156
Book Description
Tailoring the Emission of Stripe-array Diode Lasers with External Cavities to Enable Nonlinear Frequency Conversion
Author: Andreas Jechow
Publisher: Universitätsverlag Potsdam
ISBN: 3869560312
Category : Science
Languages : en
Pages : 152
Book Description
A huge number of applications require coherent radiation in the visible spectral range. Since diode lasers are very compact and efficient light sources, there exists a great interest to cover these applications with diode laser emission. Despite modern band gap engineering not all wavelengths can be accessed with diode laser radiation. Especially in the visible spectral range between 480 nm and 630 nm no emission from diode lasers is available, yet. Nonlinear frequency conversion of near-infrared radiation is a common way to generate coherent emission in the visible spectral range. However, radiation with extraordinary spatial temporal and spectral quality is required to pump frequency conversion. Broad area (BA) diode lasers are reliable high power light sources in the near-infrared spectral range. They belong to the most efficient coherent light sources with electro-optical efficiencies of more than 70%. Standard BA lasers are not suitable as pump lasers for frequency conversion because of their poor beam quality and spectral properties. For this purpose, tapered lasers and diode lasers with Bragg gratings are utilized. However, these new diode laser structures demand for additional manufacturing and assembling steps that makes their processing challenging and expensive. An alternative to BA diode lasers is the stripe-array architecture. The emitting area of a stripe-array diode laser is comparable to a BA device and the manufacturing of these arrays requires only one additional process step. Such a stripe-array consists of several narrow striped emitters realized with close proximity. Due to the overlap of the fields of neighboring emitters or the presence of leaky waves, a strong coupling between the emitters exists. As a consequence, the emission of such an array is characterized by a so called supermode. However, for the free running stripe-array mode competition between several supermodes occurs because of the lack of wavelength stabilization. This leads to power fluctuations, spectral instabilities and poor beam quality. Thus, it was necessary to study the emission properties of those stripe-arrays to find new concepts to realize an external synchronization of the emitters. The aim was to achieve stable longitudinal and transversal single mode operation with high output powers giving a brightness sufficient for efficient nonlinear frequency conversion. For this purpose a comprehensive analysis of the stripe-array devices was done here. The physical effects that are the origin of the emission characteristics were investigated theoretically and experimentally. In this context numerical models could be verified and extended. A good agreement between simulation and experiment was observed. One way to stabilize a specific supermode of an array is to operate it in an external cavity. Based on mathematical simulations and experimental work, it was possible to design novel external cavities to select a specific supermode and stabilize all emitters of the array at the same wavelength. This resulted in stable emission with 1 W output power, a narrow bandwidth in the range of 2 MHz and a very good beam quality with M²<1.5. This is a new level of brightness and brilliance compared to other BA and stripe-array diode laser systems. The emission from this external cavity diode laser (ECDL) satisfied the requirements for nonlinear frequency conversion. Furthermore, a huge improvement to existing concepts was made. In the next step newly available periodically poled crystals were used for second harmonic generation (SHG) in single pass setups. With the stripe-array ECDL as pump source, more than 140 mW of coherent radiation at 488 nm could be generated with a very high opto-optical conversion efficiency. The generated blue light had very good transversal and longitudinal properties and could be used to generate biphotons by parametric down-conversion. This was feasible because of the improvement made with the infrared stripe-array diode lasers due to the development of new physical concepts.
Publisher: Universitätsverlag Potsdam
ISBN: 3869560312
Category : Science
Languages : en
Pages : 152
Book Description
A huge number of applications require coherent radiation in the visible spectral range. Since diode lasers are very compact and efficient light sources, there exists a great interest to cover these applications with diode laser emission. Despite modern band gap engineering not all wavelengths can be accessed with diode laser radiation. Especially in the visible spectral range between 480 nm and 630 nm no emission from diode lasers is available, yet. Nonlinear frequency conversion of near-infrared radiation is a common way to generate coherent emission in the visible spectral range. However, radiation with extraordinary spatial temporal and spectral quality is required to pump frequency conversion. Broad area (BA) diode lasers are reliable high power light sources in the near-infrared spectral range. They belong to the most efficient coherent light sources with electro-optical efficiencies of more than 70%. Standard BA lasers are not suitable as pump lasers for frequency conversion because of their poor beam quality and spectral properties. For this purpose, tapered lasers and diode lasers with Bragg gratings are utilized. However, these new diode laser structures demand for additional manufacturing and assembling steps that makes their processing challenging and expensive. An alternative to BA diode lasers is the stripe-array architecture. The emitting area of a stripe-array diode laser is comparable to a BA device and the manufacturing of these arrays requires only one additional process step. Such a stripe-array consists of several narrow striped emitters realized with close proximity. Due to the overlap of the fields of neighboring emitters or the presence of leaky waves, a strong coupling between the emitters exists. As a consequence, the emission of such an array is characterized by a so called supermode. However, for the free running stripe-array mode competition between several supermodes occurs because of the lack of wavelength stabilization. This leads to power fluctuations, spectral instabilities and poor beam quality. Thus, it was necessary to study the emission properties of those stripe-arrays to find new concepts to realize an external synchronization of the emitters. The aim was to achieve stable longitudinal and transversal single mode operation with high output powers giving a brightness sufficient for efficient nonlinear frequency conversion. For this purpose a comprehensive analysis of the stripe-array devices was done here. The physical effects that are the origin of the emission characteristics were investigated theoretically and experimentally. In this context numerical models could be verified and extended. A good agreement between simulation and experiment was observed. One way to stabilize a specific supermode of an array is to operate it in an external cavity. Based on mathematical simulations and experimental work, it was possible to design novel external cavities to select a specific supermode and stabilize all emitters of the array at the same wavelength. This resulted in stable emission with 1 W output power, a narrow bandwidth in the range of 2 MHz and a very good beam quality with M²<1.5. This is a new level of brightness and brilliance compared to other BA and stripe-array diode laser systems. The emission from this external cavity diode laser (ECDL) satisfied the requirements for nonlinear frequency conversion. Furthermore, a huge improvement to existing concepts was made. In the next step newly available periodically poled crystals were used for second harmonic generation (SHG) in single pass setups. With the stripe-array ECDL as pump source, more than 140 mW of coherent radiation at 488 nm could be generated with a very high opto-optical conversion efficiency. The generated blue light had very good transversal and longitudinal properties and could be used to generate biphotons by parametric down-conversion. This was feasible because of the improvement made with the infrared stripe-array diode lasers due to the development of new physical concepts.
Photonic MEMS Devices
Author: Ai-Qun Liu
Publisher: CRC Press
ISBN: 1420045717
Category : Technology & Engineering
Languages : en
Pages : 502
Book Description
Photonic MEMS devices represent the next major breakthrough in the silicon revolution. While many quality resources exist on the optic and photonic aspect of device physics, today’s researchers are in need of a reference that goes beyond to include all aspects of engineering innovation. An extension on traditional design and analysis, Photonic MEMS Devices: Design, Fabrication, and Control describes a broad range of optical and photonic devices, from MEMS optical switches and bandgap crystal switches to optical variable attenuators (VOA) and injection locked tunable lasers. It deals rigorously with all these technologies at a fundamental level, systematically introducing critical nomenclature. Each chapter also provides analysis techniques, equations, and experimental results. The book focuses not only on traditional design analysis, but also provides extensive background on realistic simulation and fabrication processes. With a clear attention to experimental relevance, this book provides the fundamental knowledge needed to take the next-step in integrating photonic MEMS devices into commercial products and technology.
Publisher: CRC Press
ISBN: 1420045717
Category : Technology & Engineering
Languages : en
Pages : 502
Book Description
Photonic MEMS devices represent the next major breakthrough in the silicon revolution. While many quality resources exist on the optic and photonic aspect of device physics, today’s researchers are in need of a reference that goes beyond to include all aspects of engineering innovation. An extension on traditional design and analysis, Photonic MEMS Devices: Design, Fabrication, and Control describes a broad range of optical and photonic devices, from MEMS optical switches and bandgap crystal switches to optical variable attenuators (VOA) and injection locked tunable lasers. It deals rigorously with all these technologies at a fundamental level, systematically introducing critical nomenclature. Each chapter also provides analysis techniques, equations, and experimental results. The book focuses not only on traditional design analysis, but also provides extensive background on realistic simulation and fabrication processes. With a clear attention to experimental relevance, this book provides the fundamental knowledge needed to take the next-step in integrating photonic MEMS devices into commercial products and technology.
Physics of Semiconductor Lasers
Author: B. Mroziewicz
Publisher: Elsevier
ISBN: 1483291650
Category : Science
Languages : en
Pages : 474
Book Description
Written for readers who have some background in solid state physics but do not necessarily possess any knowledge of semiconductor lasers, this book provides a comprehensive and concise account of fundamental semiconductor laser physics, technology and properties. The principles of operation of these lasers are therefore discussed in detail with the interrelations between their design and optical, electrical and thermal properties. The relative merits of a large number of laser structures and their parameters are described to acquaint the reader with the various aspects of the semiconductor lasers and the trends in their development.
Publisher: Elsevier
ISBN: 1483291650
Category : Science
Languages : en
Pages : 474
Book Description
Written for readers who have some background in solid state physics but do not necessarily possess any knowledge of semiconductor lasers, this book provides a comprehensive and concise account of fundamental semiconductor laser physics, technology and properties. The principles of operation of these lasers are therefore discussed in detail with the interrelations between their design and optical, electrical and thermal properties. The relative merits of a large number of laser structures and their parameters are described to acquaint the reader with the various aspects of the semiconductor lasers and the trends in their development.