摘要
采用提拉法生长了1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)和1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)两种晶体(式中Er、Yb浓度为原子数分数)。测量并分析了晶体在室温下的吸收系数谱、上转换荧光谱、发射截面谱、增益截面谱和荧光衰减曲线。1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)晶体在峰值荧光波长1537 nm处的发射截面、Er^(3+)的4 I 13/2多重态荧光寿命和Yb^(3+)→Er^(3+)的能量传递效率分别为0.54×10^(-20)cm^(2)、9.9 ms和90%;1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)晶体在峰值荧光波长1537 nm处的发射截面、Er^(3+)的4 I 13/2多重态荧光寿命和Yb^(3+)→Er^(3+)的能量传递效率则分别为0.58×10^(-20)cm^(2)、9.7 ms和93%。基于975 nm半导体激光端面泵浦,在1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)晶体中实现了97 mW最高功率和27.1%斜效率的1567 nm连续激光输出,在1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)晶体中实现了93 mW最高功率和17.1%斜效率的1567 nm连续激光输出。
Er^(3+),Yb^(3+)∶Ba_(3)Gd(PO_(4))_(3)crystals with different atomic fractions of Er^(3+)and Yb^(3+),i.e.1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)and 1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)were successfully grown by the Czochralski method.Room-temperature absorption coefficient spectra,up-conversion fluorescence spectra,emission cross-section spectra,gain cross-section spectra and fluorscence decay curves of the crystals were measured and analyzed.Emission cross-section at peak fluorescence wavelength of 1537 nm,fluorescence lifetime of the 4 I 13/2 multiplet of Er^(3+)and Yb^(3+)→Er^(3+)energy transfer efficienecy of the 1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)crystal are 0.54×10^(-20)cm^(2),9.9 ms and 90%,respectively,while the above values of the 1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)crystal are 0.58×10^(-20)cm^(2),9.7 ms and 93%,respectively.End-pumped by 975 nm laser diode,1567 nm continuous-wave laser with maximum output power of 97 mW and slope efficiency of 27.1%is obtained in the 1.85%Er,23.95%Yb∶Ba_(3)Gd(PO_(4))_(3)crystal,while 1567 nm continuous-wave laser with maximum output power of 93 mW and slope efficiency of 17.1%is obtained in the 1.95%Er,55.73%Yb∶Ba_(3)Gd(PO_(4))_(3)crystal.
作者
黄建华
吴杰
黄艺东
林炎富
龚兴红
陈雨金
HUANG Jianhua;WU Jie;HUANG Yidong;LIN Yanfu;GONG Xinghong;CHEN Yujin(Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《人工晶体学报》
CAS
北大核心
2023年第7期1286-1295,共10页
Journal of Synthetic Crystals
基金
国家重点研发计划(2021YFB3601504)
国家自然科学基金(52272010)。
