固体激光用Nd:Lu_(2)O_(3)透明陶瓷的制备和光学性能研究  

Fabrication and Optical Property of Nd:Lu_(2)O_(3) Transparent Ceramics for Solid-state Laser Applications

作　　者：刘子玉 TOCI Guido PIRRI Angela PATRIZI Barbara 冯亚刚 陈肖朴 胡殿君 田丰 吴乐翔[1] VANNINI Matteo 李江[1,2] LIU Ziyu;TOCI Guido;PIRRI Angela;PATRIZI Barbara;FENG Yagang;CHEN Xiaopu;HU Dianjun;TIAN Feng;WU Lexiang;VANNINI Matteo;LI Jiang(Key Laboratory of Transparent Opto-functional Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China;Center of Materials Science and Optoelectronic Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Istituto Nazionale di Ottica,Consiglio Nazionale delle Ricerche,CNR-INO,Via Madonna del Piano 10C,50019 Sesto Fiorentino(Fi),Italy;Istituto di Fisica Applicata“Carrara”,Consiglio Nazionale delle Ricerche,CNR-IFAC,Via Madonna del Piano 10C,50019 Sesto Fiorentino(Fi),Italy)

机构地区：[1]中国科学院上海硅酸盐研究所,透明光功能无机材料重点实验室,上海201899 [2]中国科学院大学,材料与光电研究中心,北京100049 [3]意大利国家研究委员会国立光学研究所,佛罗伦萨50019 [4]意大利国家研究委员会“Carrara”应用物理研究所,佛罗伦萨50019

出　　处：《无机材料学报》2021年第2期210-216,共7页Journal of Inorganic Materials

基　　金：National Key R&D Program of China(2017YFB0310500);Key Research Project of the Frontier Science of the Chinese Academy of Sciences(QYZDB-SSW-JSC022)。

摘　　要：Nd:Lu_(2)O_(3)材料由于具有高热导率、低声子能量和优异的光学特性而成为非常有前景的高功率固体激光器用的增益介质。但Lu_(2)O_(3)单晶的熔点超过2400℃,难以生长,而Lu_(2)O_(3)陶瓷既能在低温下制备,又具有与晶体相当的光学性质和激光性能从而备受关注。本研究制备了高透明的Nd:Lu_(2)O_(3)陶瓷并对其光学性质和激光性能进行探究。以共沉淀法制备的纳米粉体为原料,采用真空烧结结合热等静压(HIP)两步烧结法制备了1.0at%Nd:Lu_(2)O_(3)透明陶瓷。对制备的粉体、素坯和陶瓷的微结构进行了表征:HIP后处理的陶瓷平均晶粒尺寸是724.2nm。厚度为1.0mm的1.0at%Nd:Lu_(2)O_(3)透明陶瓷在1100 nm处的直线透过率是82.4%,样品在806 nm处的吸收截面为1.50×10^(-20)cm^(2),而根据荧光光谱计算得到的发射截面为6.5×10^(–20)cm^(2)。分别在878.8和895.6 nm波长激发下,1.0at%Nd:Lu_(2)O_(3)透明陶瓷(4)^F3/2→(4)^I11/2跃迁的平均荧光寿命均为169ms。当输出耦合镜的透过率TOC=2.0%时,退火后的1.0at%Nd:Lu_(2)O_(3)透明陶瓷获得了最大输出功率为0.47 W的准连续(QCW)激光输出,斜率效率为8.7%。本研究成功制备了显微结构均匀、高透明度的1.0at%Nd:Lu_(2)O_(3)陶瓷,并展示了其在固体激光增益介质领域的广阔应用潜力。Nd^(3+) doped Lu_(2)O_(3) crystal has been suggested to be potential gain medium for high-power solid-state lasers due to the high thermal conductivity,low phonon energy and excellent optical properties.Because of the extremely high melting point of above 2400℃,great attention has been paid to the Lu_(2)O_(3)-based transparent ceramics considering the comparable optical properties and laser performance with single crystal.In this work,we aimed at fabricating highly transparent Nd:Lu_(2)O_(3) ceramics and investigating the optical properties and laser performance.1.0 at%Nd:Lu_(2)O_(3) ceramics were fabricated by two-step sintering,namely vacuum sintering along with hot isostatic pressing(HIP)method,from coprecipitated nano-powders.The microstructures of the as-prepared powder,green body and ceramics were studied.The average grain size of the HIPed ceramics is 724.2 nm.The final ceramic sample has the in-line transmittance of 82.4%at 1100 nm(1.0 mm thickness).The absorption cross-section of 1.0 at%Nd:Lu_(2)O_(3) ceramics at 806 nm is 1.50×10^(-20)cm^(2)and the calculated emission cross-section from fluorescence spectrum at 1080 nm is about 6.5×10^(-20)cm^(2).The mean fluorescence lifetime,169 ms,of the(4)^F3/2→(4)^I11/2 was measured at the two excitation wavelengths of 878.8 and 895.6 nm,respectively.Laser performance of the annealed ceramic sample was investigated in quasi-continuous wave(QCW)condition.A maximum laser output power of 0.47 W with a slope efficiency of 8.7%is obtained by using an output coupler with a transmission of TOC=2.0%.Briefly,laser level Nd:Lu_(2)O_(3) transparent ceramics with high optical transparency and uniform microstructure have been fabricated,which are promising gain media for solid-state lasers.

关 键 词：Nd:Lu2O3透明陶瓷 共沉淀法 两步烧结 光学性能 激光性能 

分 类 号：TQ174[化学工程—陶瓷工业]