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796 nm二极管泵浦连续波1.88 W Tm∶LYF激光器 被引量:1
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作者 丁本利 周雄 +2 位作者 夏海平 张百涛 陈宝玖 《发光学报》 EI CAS CSCD 北大核心 2020年第7期819-825,共7页
用坩埚下降法生长了Tm3+掺杂浓度分别为0.8%和1.3%的优质大尺寸LiYF4(LYF)单晶体。测定了单晶体的吸收光谱、发射光谱,并计算了3F4能级的的最大吸收截面与最大发射截面分别为0.25×10^-20 cm^2和0.33×10^-20 cm^2。以796 nm半... 用坩埚下降法生长了Tm3+掺杂浓度分别为0.8%和1.3%的优质大尺寸LiYF4(LYF)单晶体。测定了单晶体的吸收光谱、发射光谱,并计算了3F4能级的的最大吸收截面与最大发射截面分别为0.25×10^-20 cm^2和0.33×10^-20 cm^2。以796 nm半导体激光器(LD)为泵浦源,采用短平板腔结构模型研究了Tm掺杂LYF单晶体在~2.0μm波段的激光输出性能。当LD泵浦功率为3.4 W时,Tm∶YLF晶体的最大激光输出功率为1.88 W,相应的光光转换效率和斜率效率分别为51%和57%。使用半导体可饱和吸收镜抽运Tm掺杂LYF单晶体,测试其在~2.0μm波段连续波锁模激光运转。当最大抽运功率为3.5 W时,获得锁模激光的最大平均输出功率为200 mW,此时锁模脉冲宽度~20 ps,对应的重复频率63.86 MHz,中心谱线为1.88μm。结果表明,Tm掺杂LYF单晶体是一种具有较好物理性能的~2μm波段超快激光晶体。 展开更多
关键词 Tm离子 2.0μm 连续波 连续波锁模
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The effects of Er^(3+) ion concentration on 2.0-μm emission performance in Ho^(3+)/Tm^(3+) co-doped Na_(5)Y_(9)F_(32) single crystal under 800-nm excitation
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作者 Benli Ding Xiong Zhou +3 位作者 Jianli Zhang Haiping Xia Hongwei Song Baojiu Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第1期511-518,共8页
Na_(5)Y_(9)F_(32) single crystals doped with ~0.8-mol% Ho^(3+),~1-mol% Tm^(3+),and various Er^(3+) ion concentrations were prepared by a modified Bridgman method.The effects of Er^(3+)ion concentration on 2.0-μm emis... Na_(5)Y_(9)F_(32) single crystals doped with ~0.8-mol% Ho^(3+),~1-mol% Tm^(3+),and various Er^(3+) ion concentrations were prepared by a modified Bridgman method.The effects of Er^(3+)ion concentration on 2.0-μm emission excited by an800-nm laser diode were investigated with the help of their spectroscopic properties.The intensity of 2.0-μm emission reached to maximum when the Er^(3+) ion concentration was ~1 mol%.The energy transfer mechanisms between Er^(3+),Ho^(3+),and Tm^(3+) ions were identified from the change of the absorption spectra,the emission spectra,and the measured decay curves.The maximum 2.0-μm emission cross section of the Er^(3+)/Ho^(3+)/Tm^(3+)tri-doped Na_(5)Y_(9)F_(32) single crystal reached 5.26 × 10^(-21) cm^(2).The gain cross section spectra were calculated according to the absorption and emission cross section spectra.The cross section for ~2.0-μm emission became a positive gain once the inversion level of population was reached 30%.The energy transfer efficiency was further increased by 11.81% through the incorporation of Er^(3+) ion into Ho^(3+)/Tm^(3+) system estimated from the measured lifetimes of Ho^(3+)/Tm^(3+)-and Er^(3+)/Ho^(3+)/Tm^(3+)-doped Na_(5)Y_(9)F_(32)single crystals.The present results illustrated that the Er^(3+)/Ho^(3+)/Tm^(3+)tri-doped Na_(5)Y_(9)F_(32) single crystals can be used as promising candidate for 2.0-μm laser. 展开更多
关键词 2.0-μm emission Er^(3+)/Ho^(3+)/Tm^(3+) energy transfer Na_(5)Y_(9)F_(32)single crystal
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