Processing of Ceramics. Группа авторов

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       Library of Congress Cataloging‐in‐Publication Data Applied for:

      ISBN: 9781119538707

      Cover Design: Wiley

      Cover Image: © Akio Ikesue

      Yan Lin Aung World‐Lab Co., Ltd. Mutsuno Atsutaku Nagoya Japan

      Penghui Chen Key Laboratory of Transparent Opto‐functional Inorganic Materials Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China and Center of Materials Science and Optoelectronics Engineering University of Chinese Academyof Sciences Beijing China

      Xiaopu Chen Key Laboratory of Transparent Opto‐functional Inorganic Materials Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China and Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China

      Akio Ikesue World‐Lab Co., Ltd. Mutsuno Atsutaku Nagoya Japan

      Jiang Li Key Laboratory of Transparent Opto‐functional Inorganic Materials Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China and Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China

      Takuya Mikami Okamoto Optics, INC. Haramachi, Isogoku Yokohama Japan

      Martin Nikl Institute of Physics of the Czech Academy of Sciences Prague Czech Republic

      Jian Xu Graduate School of Human and Environmental Studies Kyoto University Kyoto Japan and International Center for Young Scientists (ICYS) National Institute for Materials Science (NIMS) Tsukuba Japan

      I worked for a refractory company specializing in steelmaking and was planning to retire as a refractory engineer after graduating from the university (master's course) in 1983. In 1991, my boss, the research director, said to me, “I want you to develop anything good new technology.” New technology for refractory companies generally means “development of refractories useful for steel smelting.” However, as a young and motivated engineer at that time, “anything good” was interpreted by me as “new development in any area of expertise is okay!” I was very interested in ceramics at that time, but I was quite an amateur, so if I have to do anything new, I chose a research that is the most challenging in the world and in which no one has succeeded until now. I had read a variety of literature and judged that “laser oscillation with polycrystalline ceramics would be the most difficult technology.” At that time I focused on the article “Polycrystalline Ceramic Lasers, J. Appl. Phys. (1973)” by C. Greskovich and J. P. Chernoch, but their results were distinctly different from laser oscillation. Besides, similar research was not reported by other researchers. I suddenly understood that this must be a certainly difficult technology. I also understood that even single crystals cannot oscillate laser with high efficiency in the case of lamp excitation system. I thus interviewed several Japanese laser specialists and scientists regarding the possibility of developing ceramic lasers, but the only answer I received was “even glasses and single crystal laser gain media have optical problems; ceramics with lots of scattering sources aimed for laser gain media is absolutely meaningless.” The same question was asked to material scientists as well, and their answers were also similar that “translucent ceramics has been developed, but its optical quality is low quality that cannot be compared with single crystal. So, you should quit this foolish idea to develop a ceramic laser.” Even from the viewpoint of scattering theory, it seemed considerably impracticable, so I presumed that “this must be a new technology,” and it became the starting point for my new research topic i.e. the development of ceramic lasers.

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