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2010年,中国科学院上海硅酸盐研究所在国家863项目的资助下,开展了YCOB晶体的生长研究,攻克原料合成的难题,并探索合适温场,解决晶体多晶、发黑等生长问题,于2010年初获得1英寸直径YCOB晶体,2010年底成功生长2英寸直径YCOB晶体,2011年3月将YCOB晶体的直径扩大到3英寸以上;随后克服晶体解理、包裹体、生长条纹等生长缺陷,于2011年6月获得了无开裂和无包裹体的晶体;经测试,晶体光学均匀性好于2.0×10-5,用该晶体制作了60 mm×60 mm口径的YCOB晶体非线性光学器件,成功应用于焦耳量级的非共线参量啁啾脉冲放大(OPCPA),在前端钛宝石啁啾脉冲放大基础上,将能量35 J的527 nm泵浦光转化为能量3.36 J的800 nm信号光,该信号光压缩脉冲周期为44.3fs,带宽达到49 nm,表明YCOB晶体可成为拍瓦激光系统的末级放大器(初步结果发表于Optics Letters 37(2012)1712)。
In 2010, the Shanghai Institute of Ceramics, Chinese Academy of Sciences, supported by the National 863 Program, carried out research on the growth of YCOB crystals to overcome the problems of synthesis of raw materials, explored appropriate temperature field, solved the growth problems of crystal polycrystalline and blackening, YCOB crystals were obtained at the beginning of 2010, YCOB crystals were successfully grown at the end of 2010 and YCOB crystals were expanded to more than 3 inches in diameter in March 2011. Subsequently, growth defects such as crystal cleavage, inclusions and growth stripes were overcome, The non-cracked and non-inclusion crystals were obtained in June 2011. The optical homogeneity of the crystal was better than 2.0 × 10-5. The YCOB crystal nonlinear optical devices with the diameter of 60 mm × 60 mm were fabricated by this crystal. Based on the non-collinear parametric chirped pulse amplification (OPCPA) of joules, the 525 nm pump energy of 35 J was converted to an optical signal of 3.36 J at 800 nm The signal compression pulse period is 44.3fs with a bandwidth of 49 nm, indicating that the YCOB crystal can be used as a final amplifier for a watt-pound laser system (preliminary results are published in Optics Letters 37 (2012) 1712).