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| Author | : Richard I. Epstein |
| Publisher | : John Wiley & Sons |
| Total Pages | : 258 |
| Release | : 2010-12-13 |
| Genre | : Science |
| ISBN | : 3527628053 |
Download Optical Refrigeration Book in PDF, ePub and Kindle
Edited by the two top experts in the field with a panel of International contributors, this is a comprehensive up-to-date review of research and applications. Starting with the basic physical principles of laser cooling of solids, the monograph goes on to discuss the current theoretical issues being resolved and the increasing demands of growth and evaluation of high purity materials suitable for optical refrigeration, while also examining the design and applications of practical cryocoolers. An advanced text for scientists, researchers, engineers, and students (masters, PHDs and Postdoc) in laser and optical material science, and cryogenics.
| Author | : S V Petrushkin |
| Publisher | : Elsevier |
| Total Pages | : 237 |
| Release | : 2009-10-26 |
| Genre | : Technology & Engineering |
| ISBN | : 1845696832 |
Download Laser Cooling of Solids Book in PDF, ePub and Kindle
Laser cooling is an important emerging technology in such areas as the cooling of semiconductors. The book examines and suggests solutions for a range of problems in the development of miniature solid-state laser refrigerators, self-cooling solid-state lasers and optical echo-processors. It begins by looking at the basic theory of laser cooling before considering such topics as self-cooling of active elements of solid-state lasers, laser cooling of solid-state information media of optical echo-processors, and problems of cooling solid-state quantum processors.Laser Cooling of Solids is an important contribution to the development of compact laser-powered cryogenic refrigerators, both for the academic community and those in the microelectronics and other industries. Provides a timely review of this promising field of research and discusses the fundamentals and theory of laser cooling Particular attention is given to the physics of cooling processes and the mathematical description of these processes Reviews previous experimental investigations in laser cooling and presents progress towards key potential applications
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| Release | : 2016 |
| Genre | : |
| ISBN | : |
Download Solid-state Optical Refrigeration to Sub-100 Kelvin Regime Book in PDF, ePub and Kindle
We report that since the first demonstration of net cooling twenty years ago, optical refrigeration of solids has progressed to outperform all other solid-state cooling processes. It has become the first and only solid-state refrigerator capable of reaching cryogenic temperatures, and now the first solid-state cooling below 100 K. Such substantial progress required a multi-disciplinary approach of pump laser absorption enhancement, material characterization and purification, and thermal management. Here we present the culmination of two decades of progress, the record cooling to ≈91K from room temperature.
| Author | : |
| Publisher | : |
| Total Pages | : 10 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
Download All Solid-State Optical Cryocoolers Book in PDF, ePub and Kindle
This is the final report on the research performed under AFOSR grant F4962O-O2-OO59. In conjunction with another AFOSR grant (F49620-02-0057), we undertook a comprehensive research program to address the fundamental issues of optical refrigeration in solids important for the development of practical solid-state cryocoolers. We pursued two main avenues of research: First, we explored new rare-earth-doped glasses and crystals that have improved cooling efficiencies and/or lower operating temperatures. This phase also investigated the fundamental physics of optical refrigeration as well as limitations imposed by the structure and composition of the glass for reaching cryogenic temperatures. Second, we studied semiconductor-based optical refrigerators that are much more compact and may achieve appreciably lower operating temperatures than devices based on rare-earth-doped glasses or crystals.
| Author | : Richard I. Epstein |
| Publisher | : SPIE-International Society for Optical Engineering |
| Total Pages | : 140 |
| Release | : 2007 |
| Genre | : Science |
| ISBN | : |
Download Laser Cooling of Solids Book in PDF, ePub and Kindle
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
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| Release | : 2008 |
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Download Laser Cooling of Solids Book in PDF, ePub and Kindle
We present an overview of solid-state optical refrigeration also known as laser cooling in solids by fluorescence upconversion. The idea of cooling a solid-state optical material by simply shining a laser beam onto it may sound counter intuitive but is rapidly becoming a promising technology for future cryocooler. We chart the evolution of this science in rare-earth doped solids and semiconductors.
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| Total Pages | : |
| Release | : 2009 |
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Download Model of Laser-induced Temperature Changes in Solid-state Optical Refrigerators Book in PDF, ePub and Kindle
| Author | : |
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| Release | : 2009 |
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Download Measurement of Solid-state Optical Refrigeration by Two-band Differential Luminescence Thermometry Book in PDF, ePub and Kindle
We present a non-contact spectroscopic teclmique for the measurement of laser-induced temperature changes in solids. Two-band differential luminescence thermometry (TBDLT) achieves a sensitivity of ≈7 mK and enables precise measurement of the net quantum efficiency of optical refrigerator materials. TBDLT detects internal temperature changes by decoupling surface and bulk heating effects via time-resolved luminescence spectroscopy. Several Yb{sup 3+}-doped fluorozirconate (ZBLANI) glasses fabricated from precursors of varying purity and by different processes are analyzed in detail. A net quantum efficiency of 97.39% at 238 K (at a pump wavelength of 1020.5 nm) is found for a ZBLANI:1%Yb{sup 3+} laser-cooling sample produced from metal fluoride precursors that were purified by chelate-assisted solvent extraction and dried in hydrofluoric gas. In comparison, a ZBLANI:1%Yb{sup 3+} sample produced from commercial-grade metal fluoride precursors showed pronounced laser-induced heating that is indicative of a substantially higher impurity concentration. TBDLT enables rapid and sensitive benchmarking of laser-cooling materials and provides critical feedback to the development and optimization of high-performance optical cryocooler materials.
| Author | : Office of naval research arlington va |
| Publisher | : |
| Total Pages | : 4 |
| Release | : 1998 |
| Genre | : |
| ISBN | : |
Download Optical Refrigeration in the Solid State Book in PDF, ePub and Kindle
Operating at reduced temperature dramatically enhances the performance of many devices. Semiconductor laser diodes are more efficient and semiconductor photodetectors are more sensitive when cooled. Some devices, particularly those that depend on the phenomenon of superconductivity, only operate at cryogenic temperatures (less than approximately 150 K). Hence, the need for reliable refrigeration of electronic devices is well established. However, existing refrigeration technology is far from ideal. Vibrations produced by Sterling cycle refrigerators are detrimental to device performance. Magnetic salt cooling is not compatible with many applications. Cryogenic baths require a continuous supply of cryogenic liquids, which are difficult to make and transport. And the minimum temperature achievable via Peltier cooling is only about 220 K. Clearly, there is a need for a quiet, robust refrigerator that can achieve and maintain cryogenic temperatures.
| Author | : Galina Nemova |
| Publisher | : CRC Press |
| Total Pages | : 478 |
| Release | : 2016-10-26 |
| Genre | : Science |
| ISBN | : 9814745057 |
Download Laser Cooling Book in PDF, ePub and Kindle
In the recent decades, laser cooling or optical refrigeration—a physical process by which a system loses its thermal energy as a result of interaction with laser light—has garnered a great deal of scientific interest due to the importance of its applications. Optical solid-state coolers are one such application. They are free from liquids as well as moving parts that generate vibrations and introduce noise to sensors and other devices. They are based on reliable laser diode pump systems. Laser cooling can also be used to mitigate heat generation in high-power lasers. This book compiles and details cutting-edge research in laser cooling done by various scientific teams all over the world that are currently revolutionizing optical refrigerating technology. It includes recent results on laser cooling by redistribution of radiation in dense gas mixtures, three conceptually different approaches to laser cooling of solids such as cooling with anti-Stokes fluorescence, Brillouin cooling, and Raman cooling. It also discusses crystal growth and glass production for laser cooling applications. This book will appeal to anyone involved in laser physics, solid-state physics, low-temperature physics or cryogenics, materials research, development of temperature sensors, or infrared detectors.
