Confirmed Invited Speakers Author Title Abstract Boulon, G. Segregation phenomenon of rare earth dopants in ceramics We analyse segregation phenomenon of Ce 3+ (first position) and Yb 3+ (last position) rare earth dopants in grain and grain boundaries of oxide optical ceramics from imaging confocal microscopy and transmission electronic microscopy. Interpretation is related with growth from liquid phase. Dong, J. Comparative investigation of cw and Q-switched laser performance of Yb:YAG ceramics and crystals Gaume, R. Characterization of absorption losses in YAG laser ceramics We will report on comparative thermalized absorption measurements obtained in various YAG transparent ceramics and single-crystals. Correlations with lattice defects and impurities content will be discussed. Jaque, D. Microstructuration techniques for the development of minituarized Nd:YAG ceramic lasers The last developments achieved in the micro-structuration of Nd:YAG ceramic lasers for their incorporation in active photonic devices will be discussed. We will pay special attention to the fundamentals of the different techniques used up to now. Kaminskii, A. A. Where did the fifty-year search for laser crystal and ceramics take us? During half a century history of the laser era the search for laser crystals and ceramics has brought many important results. They have largely determined the development and formation of laser physics. Applications of laser crystals and ceramics are well known. Some of them (mainly with Ln 3+ lasants) in the report would be given special attention. Unfortunately, the further success of the search and application of laser crystal materials prevented a number of issues that have not been fully resolved over the years. Some of these problems will be considered in the report taking into account modern trends of laser physics and nonlinear optics. Kawanaka, J. High pulse energy and high average power laser by using a composite ceramic Diode-pumped solid-state laser has been developed by using a cryogenic composite ceramic. A novel laser amplifier arrangement of total-reflection active-mirror was proposed for high-pulse-energy and high-average-power simultaneously. The regenerative amplifier was demonstrated and a joule-class multi-pass amplifier is under construction. Khazanow, E. Specificity of thermal effects in laser ceramics as compared to single crystals: theory and experiments We review theoretical predictions and experimental confirmations of strong statistical dispersion of thermal lensing and thermally induced depolarization in ceramics. This effect is specific to ceramics and has no analogues either in glasses or in single crystals. Kuretake, S. Nd 3+ -doped Ba(Zr 4+ ,Mg 2+ ,Ta 5+ )O 3 ceramics as laser materials We report transparent Nd 3+ -doped Ba(Zr,Mg,Ta)O 3 (Nd:BZMT) ceramics as laser materials. The results of the structural analyses and the fluorescence properties in Nd:BZMT fabricated by adjusting the BZMT composition in order to substitute Nd dopants at different crystal sites will be reported. Menke, Y. Transparent ceramics for optical and fluorescence applications In this paper new developments in the fabrication of high refractive index materials with cubic crystal structure as possible matrix material for rare-earth activated compounds are described. Related applications in both optical and fluorescence application fields are illustrated. Shimonya, Y. Strength and strengthening of polycrystalline (ceramic) laser components Crystalline laser components may fracture under high thermally induced stress. In the present paper, ways to evaluate the tensile strength of crystalline and poly-crystalline laser components will be discussed, as well as paths to enhance their strength. Strk, W. Upconversion phenomena in Er-doped Yb:YAG nanocrystalline powders and ceramics Taira, T. Anisotropic ceramics as a next generation laser Transparent polycrystalline ceramics for laser applications have been demonstrated to offer tremendous processing and design advantages relative to Czochralski-grown single crystals. After the review of conventional ceramic lasers, we'd like to discuss the next generation of ceramic lasers based on anisotropic ceramics. Tanabe, S. Optical properties of transparent GdYAG:Ce ceramics for white LED Transparent Ce 3+ -doped GdYAG ceramics were fabricated by vacuum sintering of powders prepared by co-precipitation methods. By exciting with a blue LED, the ceramics on top showed excellent luminous efficacy and good color rendering as a white LED. In the photoluminescence spectra, the wavelength shift of the Ce 3+ :5d -4f transition was observed by Gd substitution of Y-site, as well as in the photoluminescence excitation spectra. Ueda, K. I. will be reported later Wei, G. Optical ceramics for solid state lighting Solid-state lighting utilizes new optical ceramics such as Ce-doped garnets to either combine emissions from the LED and ceramic for high-brightness white light, or fully convert to pure color. Precision fabrication achieves efficient luminescent ions, host lattices, and favorable absorption and emission. Weichmann, U. Ceramic materials for visible solid-state lasers For consumer applications of lasers, ceramic laser materials play an important role with respect to the integration aspects of the laser setup. In this contribution we will present results from our work on integrated green efficient lasers for projection systems. Zhang, J. Processing control for fabricating high quality Nd:YAG ceramics In this research, the effects of stoichiometry ratio, sintering aids, and sintering conditions on microstructure and further the optical quality of the sintered ceramics will be discussed. By optimizing the processing parameters, high optical quality YAG ceramics are fabricated successfully. 引用： https://en.fh-muenster.de/iot/LCS-2010/lcs-10_programme.php?p=7,0#a3
激光陶瓷分会的第一个邀请报告是 OSRAM SYLVANIA 的 George. C. Wei ，报告题目是 Advances in Optical Ceramics 。半透明氧化铝陶瓷已经用来高压钠灯管，其结构和性能已经有了很大的改善。无论氧化铝原料的纯度和尺寸，还是氧化铝烧结体的检测手段都有了很大的提高。如今氧化镁在氧化铝中的固溶，被认为控制着晶粒尺寸。在致密化过程中，随着晶界移动的停止和气孔的消除，添加剂在晶界的富集程度，晶界宽度和晶格中的固溶含量都会发生变化。同时，氧空位影响移动晶界的界面传输，并显著影响氧化铝陶瓷烧结体的光学性能。特别大的晶粒尺寸（转变成蓝宝石）和非常小的晶粒尺寸（亚微米晶粒尺寸）都会进一步提高透过率。 B 2 O 3 的掺杂能提高多晶氧化铝陶瓷变成蓝宝石单晶的转化率。这些氧化铝陶瓷材料和立方结构的高对称性陶瓷（如 Y 2 O 3 ， Y 3 Al 5 O 12 ， MgAl 2 O 4 ， AlON 等）都因为粉体、成型、烧结等技术的发展，光学性能都大大的提高。光学陶瓷的应用范围包括：固体激光器增益介质、闪烁体、窗口、盔甲等。 Prof. George. C. Wei做邀请报告 光学陶瓷的热－机械性能 多晶氧化铝陶瓷转变成蓝宝石 晶粒生长成单晶 Dy2O3透明陶瓷 半透明发光陶瓷 透明立方晶系陶瓷 光学陶瓷总结
标签: 光学陶瓷
