Yb^(3+):GdTaO_4的提拉法晶体生长和光谱特性  

Crystal Gowth by Czochralski Method and Sectral Poperties of Yb^(3+):GdTaO_4

作　　者：张庆礼[1,2] 周文龙[1,2] 刘文鹏[1,2] 丁丽华[1,2] 罗建乔[1,2] 殷绍唐[1,2] 江海河[1,2] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]安徽光子器件与材料重点实验室,安徽合肥230031

出　　处：《光学学报》2010年第3期849-853,共5页Acta Optica Sinica

基　　金：国家自然科学基金(50772112;50872135;90922003);安徽省优秀青年基金(08040106820)资助课题

摘　　要：用提拉法生长了新型激光晶体Yb^(3+):GdTaO_4,测量了它的吸收和光致发光光谱,计算了它的光谱特性参数。Yb^(3+):GdTaO_4的吸收半峰全宽(FWHM)为56 nm,约为Yb^(3+):YAG的2.4倍;吸收峰为930,957,974 nm,吸收截面分别为0.81×10^(-20),0.91×10^(-20),1.2×10^(-20)cm^2;光致发光发射主峰为1016,1035 nm的FWHM分别为42,57 nm,为Yb^(3+):YAG的4～6倍,发射截面约为2.29×10^(-20),1.36×10^(-20)cm^2,与Yb^(3+):YAG相当。它的宽吸收带有利于降低抽运激光二极管(LD)的温度调控依赖,宽的发射带则有利于实现超短脉冲和可调谐激光输出。结果表明Yb^(3+):GdTaO_4是非常有希望的全固态超短脉冲激光、可调谐激光的工作物质。Yb^3＋：GdTaO_4 was grown by Czochralski method.Its absorption,photoluminescence spectra were measured,and its spectral property parameters were computed.Full width at half maximum（FWHM） of absorption of Yb^3＋：GdTaO4 is 56 nm,which is 2.4 times broader than that of Yb^3＋：YAG.Its absorption peaks are at 930,957 and 974 nm,whose absorption cross sections are 0.81×10^-20,0.91×10^-20,and 1.2×10^-20 cm^2,respectively. The main peak of photoluminescence is at 1016 nm.The FWHM of emission peaking at 1016 and 1035 nm are 42 and 57 nm,which are 4～6 times wider than that of Yb^3＋：YAG,corresponding cross sections are 2.29×10^-20 and 1.36×10^-20 cm^2,respectively,which are a little higher than or equal to that of Yb^（3＋）：YAG.Its broad absorption band makes for decreasing the dependence on the temperature control of pump laser diode（LD）,and broad emission band makes for realizing laser output of ultra-short pulse and tunable laser.Results indicate that Yb^（3＋）：GdTaO_4 is a very promising laser medium used in all-solid state ultra-short pulsed and tunable lasers.

关 键 词：光学材料 Yb^(3+):GdTaO_4 晶体生长 吸收光谱 发光 折射率 

分 类 号：O782.5[理学—晶体学]