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Pr,Yb,Ho:GdScO_(3)晶体生长及光谱性能
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作者 孙贵花 †张庆礼 +2 位作者 罗建乔 王小飞 谷长江 《物理学报》 SCIE EI CAS CSCD 北大核心 2024年第5期369-374,共6页
2.7-3.0μm波段激光在很多领域具有重要应用,为探索和发展该波段新型晶体材料,本文采用提拉法生长出Pr,Yb,Ho:GdScO_(3)晶体,通过共掺入Pr3+离子以达到衰减Ho^(3+):^(5)I_(7)能级寿命的目的.采用X射线衍射测试得到了晶体的粉末衍射数据... 2.7-3.0μm波段激光在很多领域具有重要应用,为探索和发展该波段新型晶体材料,本文采用提拉法生长出Pr,Yb,Ho:GdScO_(3)晶体,通过共掺入Pr3+离子以达到衰减Ho^(3+):^(5)I_(7)能级寿命的目的.采用X射线衍射测试得到了晶体的粉末衍射数据,测量了拉曼光谱,并对晶体的拉曼振动峰进行指认,对Pr,Yb,Ho:GdScO_(3)晶体的透过光谱、发射光谱和荧光寿命进行表征.Yb^(3+)的最强吸收峰在966 nm,吸收峰半峰宽为90 nm;2.7-3.0μm波段最强发射峰在2850 nm,半峰宽为70 nm;Ho^(3+):^(5)I_(6)和^(5)I_(7)能级寿命分别为1094μs和56μs.与Yb,Ho:GdScO_(3)晶体相比,Yb^(3+)的吸收峰和2.7-3.0μm的发射峰半峰宽明显展宽,同时下能级寿命显著减小,计算表明Ho^(3+):^(5)I_(7)与Pr^(3+):^(3)F_(2)+^(3)H_(6)能级之间能实现高效的能量传递.以上结果表明Pr,Yb,Ho:GdScO_(3)晶体是性能更优异的2.7-3.0μm波段激光材料. 展开更多
关键词 2.7—3.0μm激光 Pr yb Ho:GdScO_(3)晶体 晶体生长 光谱性能
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水平定向结晶法生长浓度渐变Yb∶YAG激光晶体及光谱性能研究
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作者 丁雨憧 张灵 +4 位作者 李海林 张月 唐杨 强铭 林辉 《人工晶体学报》 CAS 北大核心 2024年第10期1688-1698,共11页
本文采用水平定向结晶(HDC)法成功生长出180 mm×81 mm×16 mm的浓度渐变Yb∶YAG激光晶体,从放肩部位和尾部分别获取了尺寸为40 mm×40 mm×7 mm、70 mm×70 mm×7 mm的Yb∶YAG激光晶体板条各两件。采用632 nm... 本文采用水平定向结晶(HDC)法成功生长出180 mm×81 mm×16 mm的浓度渐变Yb∶YAG激光晶体,从放肩部位和尾部分别获取了尺寸为40 mm×40 mm×7 mm、70 mm×70 mm×7 mm的Yb∶YAG激光晶体板条各两件。采用632 nm激光、偏光应力仪对晶体板条的光学性质进行检测,实验结果发现靠近晶坯自由表面的板条内部通透,无散射光路,应力较小且分布均匀,表明该晶体板条具有优异的光学质量。进一步测试分析了晶体板条不同位置处的吸收光谱,根据935 nm波长处的吸收系数计算出Yb^(3+)的掺杂浓度,发现40 mm×40 mm×7 mm的激光晶体板条中Yb^(3+)掺杂浓度沿晶体生长方向逐步增加,浓度梯度约为0.42%/cm;而70 mm×70 mm×7 mm的激光晶体板条中Yb^(3+)掺杂浓度几乎保持不变,约为4.50%。 展开更多
关键词 浓度渐变 光谱性能 yb∶YAG 水平定向结晶法 激光晶体
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Yb∶Ca_(3)(NbGa)_(5)O_(12)晶体的坩埚下降法生长及光学性能研究 被引量:1
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作者 赵涛 艾蕾 +3 位作者 梁团结 钱慧宇 孙志刚 潘建国 《人工晶体学报》 CAS 北大核心 2024年第4期620-626,共7页
使用坩埚下降法成功生长出了镱离子掺杂钙铌镓石榴石晶体(Yb∶Ca_(3)(NbGa)_(5)O_(12))。通过XRD测试分析了晶体的结构,该晶体为立方晶系,晶胞参数a=b=c=12.471。对该晶体进行了拉曼光谱、透过光谱、吸收和发射光谱、荧光寿命等测试,计... 使用坩埚下降法成功生长出了镱离子掺杂钙铌镓石榴石晶体(Yb∶Ca_(3)(NbGa)_(5)O_(12))。通过XRD测试分析了晶体的结构,该晶体为立方晶系,晶胞参数a=b=c=12.471。对该晶体进行了拉曼光谱、透过光谱、吸收和发射光谱、荧光寿命等测试,计算了该晶体的吸收截面、发射截面、增益截面等。研究了在空气中退火对该晶体吸收光谱、发射光谱、荧光寿命的影响,退火前在935 nm处吸收截面为1.82×10^(-20)cm^(2),退火后降低为1.40×10^(-20)cm^(2),退火前在1031 nm处的发射截面为0.56×10^(-20)cm^(2),退火后降低为0.40×10^(-20)cm^(2),退火前荧光衰减时间为1.42 ms,退火后为1.32 ms。结果表明,Yb∶Ca_(3)(NbGa)_(5)O_(12)单晶在空气中退火会对晶体的激光性能造成不利影响。 展开更多
关键词 yb∶Ca_(3)(NbGa)_(5)O_(12)晶体 坩埚下降法 吸收光谱 发射光谱 荧光衰减 退火
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LD脉冲泵浦Er^(3+)/Yb^(3+):Lu_(2)Si_(2)O_(7)晶体百kHz激光器
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作者 彭嘉宁 韩雪 +4 位作者 聂霄璐 高翔 朱占达 雷訇 李强 《红外与激光工程》 EI CSCD 北大核心 2024年第8期49-55,共7页
目前1.5μm激光二极管(Laser Diode,LD)泵浦的铒镱共掺玻璃/晶体被动调Q微型激光器广泛应用于激光测距、激光雷达等领域。随着激光器输出重频的增加,玻璃面临突出的热效应问题,晶体的热导率是玻璃的10倍以上,有望能够实现比玻璃基质更... 目前1.5μm激光二极管(Laser Diode,LD)泵浦的铒镱共掺玻璃/晶体被动调Q微型激光器广泛应用于激光测距、激光雷达等领域。随着激光器输出重频的增加,玻璃面临突出的热效应问题,晶体的热导率是玻璃的10倍以上,有望能够实现比玻璃基质更高重频的激光输出。报道了一种通过LD脉冲端面泵浦Er^(3+)/Yb^(3+):Lu_(2)Si_(2)O_(7)晶体的百kHz人眼安全激光器。通过实验优化增益介质掺杂浓度和长度、泵浦光斑尺寸和调Q晶体初始透过率等实验参数,同时适当缩短脉宽,优化泵浦占空比,提高了输出重频的稳定性。最终获得了重频为100 kHz、单脉冲能量0.7μJ、脉冲宽度240 ns、光束质量M^(2)=1.61的1537 nm脉冲激光输出。实现了输出脉冲频率与泵浦的一致,保证了输出重频的稳定性,有效解决了输出重频具有随机性、不稳定、不可控等问题。 展开更多
关键词 固体激光器 百kHz 脉冲泵浦 被动调Q Er^(3+)/yb^(3+):Lu_(2)Si_(2)O_(7)晶体
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Acousto-Optically Q-Switched Operation of Yb:CNGG Disordered Crystal Laser 被引量:2
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作者 司维 马衍骏 +3 位作者 王丽莎 苑华磊 孔伟金 刘均海 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第12期28-31,共4页
We report the repetitively Q-switched laser operation of the Yb-doped calcium niobium gallium garnet disordered garnet crystal, achieved with an acousto-optic modulator in a compact plano-concave resonator that is end... We report the repetitively Q-switched laser operation of the Yb-doped calcium niobium gallium garnet disordered garnet crystal, achieved with an acousto-optic modulator in a compact plano-concave resonator that is endpumped by a 935-nm diode laser. An average output power of 1.96 W is produced at pulse repetition rate of50 k Hz at emission wavelengths around 1035 nm, with a slope efficiency of 16%. The highest pulse energy of 269 μJ is generated at pulse repetition rate of 1 k Hz, with pulse width 12.1 ns and peak power 20.53 kW. 展开更多
关键词 yb Acousto-Optically Q-Switched Operation of yb:cnGG Disordered crystal Laser
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Lu^(3+)掺杂Na_(5)Y_(9)F_(32)∶Ho^(3+)/Yb^(3+)/Ce^(3+)单晶体的增强红色上转换发光与光学温度传感性能
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作者 徐义松 方立志 +2 位作者 夏海平 周雄 宋宏伟 《发光学报》 EI CAS CSCD 北大核心 2024年第7期1104-1113,共10页
采用密封的坩埚下降法技术生长了一系列Lu^(3+)(摩尔分数0、0.6%、1.2%、1.8%)掺杂Na_(5)Y_(9)F_(32)∶Ho^(3+)/Yb^(3+)/Ce^(3+)单晶体。在980 nm LD激发下,观察到单晶体的绿光543 nm(^(5)S_(2)/^(5)F_(4)→^(5)I_(8))、红光656 nm(^(5)... 采用密封的坩埚下降法技术生长了一系列Lu^(3+)(摩尔分数0、0.6%、1.2%、1.8%)掺杂Na_(5)Y_(9)F_(32)∶Ho^(3+)/Yb^(3+)/Ce^(3+)单晶体。在980 nm LD激发下,观察到单晶体的绿光543 nm(^(5)S_(2)/^(5)F_(4)→^(5)I_(8))、红光656 nm(^(5)F_(5)→^(5)I_(8))以及近红外750 nm(^(5)S_(2)/^(5)F4→^(5)I_(7))上转换发光。从上转换发光强度随激发光强度的变化情况,确定了543 nm、656 nm与750 nm的发光为双光子跃迁过程。研究了Lu^(3+)离子掺杂浓度对其发光强度与荧光寿命的影响情况,随着Lu^(3+)掺杂浓度从0增加到1.8%,单晶体中的656 nm红光逐步增强,543 nm绿光与750 nm近红外光随之减弱,红绿光强度比从0.01增加到了1.55,而543 nm荧光寿命从1.29 ms降低至0.99 ms。Lu^(3+)离子的掺入取代Y^(3+)晶格位,改变了单晶体的局域场环境,导致上转换发光强度的变化。基于随温度变化的上转换红光656 nm(^(5)F5→^(5)I8)与绿光543 nm(^(5)S_(2)/^(5)F4→^(5)I8)的发光强度变化,研究了1.8%Lu^(3+)掺杂Na_(5)Y_(9)F_(32)∶Ho^(3+)/Yb^(3+)/Ce^(3+)单晶体在298~448 K范围内的绝对灵敏度和相对灵敏度最大值分别为0.242%·K^(-1)和0.217%·K^(-1)。 展开更多
关键词 Na_(5)Y_(9)F_(32)单晶 增强上转换红光 Ho^(3+)/yb^(3+)/Ce^(3+) 光学温度传感 能量转移
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Er^(3+),Yb^(3+)∶Ba_(3)Gd(PO_(4))_(3)晶体的生长、光谱和1.5μm激光性能 被引量:1
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作者 黄建华 吴杰 +3 位作者 黄艺东 林炎富 龚兴红 陈雨金 《人工晶体学报》 CAS 北大核心 2023年第7期1286-1295,共10页
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... 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。 展开更多
关键词 人眼安全1.5μm激光 激光晶体 Er^(3+) yb^(3+)∶Ba_(3)Gd(PO_(4))_(3)晶体 提拉法 光谱性能 连续激光性能
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940nm LD泵浦Yb∶CN 978nm激光器及其二次谐波 被引量:1
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作者 周玮琦 高龙岳 +9 位作者 张艳华 王渊博 李仕明 王斯琦 白冲 崔承坤 叶秀玲 陈永香 张力 李永亮 《激光与红外》 CAS CSCD 北大核心 2016年第10期1230-1233,共4页
报道了半导体泵浦Yb∶CaNb_2O_6晶体输出978 nm波长的激光器。泵浦模块采用了940 nm LD,在实现了Yb∶CaNb_2O_6薄盘激光器1.14 W的连续波输出的基础上,采用LBO非线性晶体进行内腔倍频实现了151 m W的489 nm连续二次谐波输出,在水平和垂... 报道了半导体泵浦Yb∶CaNb_2O_6晶体输出978 nm波长的激光器。泵浦模块采用了940 nm LD,在实现了Yb∶CaNb_2O_6薄盘激光器1.14 W的连续波输出的基础上,采用LBO非线性晶体进行内腔倍频实现了151 m W的489 nm连续二次谐波输出,在水平和垂直方向上的光束质量因子M^2分别为1.11和1.13。 展开更多
关键词 978nm 半导体泵浦 薄盘激光器 yb:cn晶体
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Efficient Near-Infrared Quantum Cutting in Tm3+/yb3+ Codoped LiYF4 Single Crystals for Solar Photovoltaic 被引量:3
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作者 符立 夏海平 +6 位作者 董艳明 李珊珊 谷雪梅 章践立 王冬杰 江浩川 陈宝玖 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第1期73-78,I0002,共7页
Downconversion (DC) with emission of two near-infrared photons about 1000 nm for each blue photon absorbed was obtained in thulium (Tm3+) and ytterbium (Yb3+) codoped yt- trium lithium fluoride (LiYF4) singl... Downconversion (DC) with emission of two near-infrared photons about 1000 nm for each blue photon absorbed was obtained in thulium (Tm3+) and ytterbium (Yb3+) codoped yt- trium lithium fluoride (LiYF4) single crystals grown by an improved Bridgman method. The luminescent properties of the crystals were measured through photoluminescence excitation, emission spectra and decay curves. Luminescence between 960 and 1050 nm from yb3+: 2Fs/2--+2FT/2 transition, which was originated from the DC from Tm3+ ions to Yb3+ ions, was observed under the excitation of blue photon at 465 nm. Moreover, the energy transfer processes were studied based on the Inokuti-Hirayama model, and the results indicated that the energy transfer from Tm3+ to Yb3+ was an electric dipole-dipole interaction. The max- imum quantum cutting efficiency approached with 0.49mo1% Tm3+ and 5.99mo1% Yb3+. increasing the energy efficiency of crystalline energy part of the solar spectrum. up to 167.5% in LiYF4 single crystal codoped Application of this crystal has prospects for Si solar cells by photon doubling of the high 展开更多
关键词 Quantum cutting Energy transfer LiYF4 single crystals Tm3+/yb3+
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Yb,Ho∶GdScO_(3)晶体生长及光谱性能分析
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作者 孙贵花 张庆礼 +3 位作者 李加红 罗建乔 王小飞 高进云 《人工晶体学报》 CAS 北大核心 2023年第7期1243-1249,共7页
采用提拉法生长出了尺寸为∅30 mm×50 mm的Yb,Ho∶GdScO_(3)晶体。通过X射线衍射得到了晶体的粉末衍射数据,使用GSAS软件进行了全谱拟合,得到了晶体的结构参数。测试了晶体的拉曼光谱,在100~700 cm^(-1)观察到18个拉曼振动峰。对Yb... 采用提拉法生长出了尺寸为∅30 mm×50 mm的Yb,Ho∶GdScO_(3)晶体。通过X射线衍射得到了晶体的粉末衍射数据,使用GSAS软件进行了全谱拟合,得到了晶体的结构参数。测试了晶体的拉曼光谱,在100~700 cm^(-1)观察到18个拉曼振动峰。对Yb,Ho∶GdScO_(3)晶体的光谱特性进行了表征,并计算了Yb^(3+)的吸收截面,其在940、975 nm处的吸收截面分别为0.31×10^(-20)、0.42×10^(-20) cm^(2)。采用Judd-Ofelt理论计算了Ho^(3+)的跃迁强度参量Ω_(t),Ω_(4)/Ω_(6)值为2.04,并计算了辐射跃迁概率、能级寿命及荧光分支比等光谱参数。结果表明,Yb,Ho∶GdScO_(3)晶体的发光性能良好,是一种有前景的2~3μm激光晶体候选材料。 展开更多
关键词 2~3μm激光 yb Ho∶GdScO_(3)晶体 晶体生长 光谱性能 JUDD-OFELT理论
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Yb∶YAG晶体荧光性能的调控研究 被引量:2
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作者 罗辉 梁松林 +5 位作者 杨永强 牛瑞华 钱奇 张辉荣 李斌 刘虹刚 《激光技术》 CAS CSCD 北大核心 2023年第5期592-599,共8页
为了对Yb∶YAG晶体荧光性能进行调控以使其更好地应用于高能脉冲型激光器,结合密度泛函理论和晶体场理论,对掺杂调控后的Yb∶YAG晶体的电子结构、光谱学性质进行了理论计算,分析了不同粒子掺杂和占据格位情况下Yb∶YAG晶体的荧光性能,... 为了对Yb∶YAG晶体荧光性能进行调控以使其更好地应用于高能脉冲型激光器,结合密度泛函理论和晶体场理论,对掺杂调控后的Yb∶YAG晶体的电子结构、光谱学性质进行了理论计算,分析了不同粒子掺杂和占据格位情况下Yb∶YAG晶体的荧光性能,并在此基础上计算配方完成晶体生长实验、制备样品进行荧光性能测试验证。结果表明,通过以上过程掌握了Yb∶YAG晶体荧光寿命等参数的调控方法,共掺Cr后的Yb∶YAG荧光寿命可以从1.18 ms降低至0.94 ms。该研究为Yb∶YAG晶体实现高能脉冲激光应用奠定了理论和实验基础。 展开更多
关键词 激光技术 性能调控 第一性原理计算 掺杂改性 晶体生长 荧光测试 yb∶YAG晶体
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Luminescence Properties and Crystal Growth of Er/Yb Codoped KGd(WO_4)_2 被引量:3
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作者 WANG Yan TU Chao-Yang +3 位作者 ZHU Zhao-Jie LI Jian-Fu YOU Zhen-Yu WU Bai-Chang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2005年第8期879-884,共6页
In this paper, the spectral and luminescence properties of a series of KGd(WO4)2 powder samples codoped with different concentrations of Er^3+ and Yb^3+ were reported,and the best doping concentrations were found ... In this paper, the spectral and luminescence properties of a series of KGd(WO4)2 powder samples codoped with different concentrations of Er^3+ and Yb^3+ were reported,and the best doping concentrations were found to be lat% Er^3+ and 10at% Yb^3+ for attaining the strongest intensity. The Er^3+/yb^3+ codoped KGd(WO4)2 crystal with good optical quality was grown by the TSSG method and the growth conditions were presented. The unpolarized absorption and emission spectra of the crystal have been measured. The strong absorption peak is at 980 nm with a FWHM of 65 nm, and the emission peak is at 1536 nm when pumped by 976 rim. The fluorescence lifetime of manifold ^4I13/2 is estimated to be 4.5 ms at room temperature.Investigations of Er, Yb:KGW crystal have shown it to have necessary combination of properties to get an effective generation of - 1.54 μm eye-safe radiation with laser diode pumping. 展开更多
关键词 ER yb:KGW crystal luminescence properties crystal growth optical properties
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Spectroscopic investigation of a new crystal: Nd^3+,Yb^3+:YVO4 被引量:1
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作者 王素梅 杜仕峰 +2 位作者 卢健 张东香 冯宝华 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第6期1786-1789,共4页
The absorption and emission spectra of the YVO4 single crystal co-doped with 1 at.% Nd^3+ and 1 at.% Yb^3+ are investigated. The efficient Nd^3+ → Yb^3+ energy transfer and the back transfer (Yb^3+ → Nd^3+) ... The absorption and emission spectra of the YVO4 single crystal co-doped with 1 at.% Nd^3+ and 1 at.% Yb^3+ are investigated. The efficient Nd^3+ → Yb^3+ energy transfer and the back transfer (Yb^3+ → Nd^3+) are observed at room temperature. The fluorescence lifetime of the 4F3/2 level of Nd^3+ in Nd,Yb:YVO4 is measured under 808 nm laser light excitation. The efficiency of Nd^3+ → Yb^3+ energy transfer in YVO4 is determined to be about 34%. 展开更多
关键词 Nd yb:YVO4 crystal energy transfer luminescence properties
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Growth and Spectroscopic Characteristics of Yb^3+:LiGd(WO_4)_2 Crystal 被引量:2
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作者 黄新阳 王国富 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第6期809-820,共12页
The Yb3+:LiGd(WO4)2 crystal with the dimension of Ф15×35 mm3 was grown by Czochralski technique. The spectroscopic characterization and fluorescence dynamics of Yb3+ in yb3+:LiGd(WO4)2 crystal were inve... The Yb3+:LiGd(WO4)2 crystal with the dimension of Ф15×35 mm3 was grown by Czochralski technique. The spectroscopic characterization and fluorescence dynamics of Yb3+ in yb3+:LiGd(WO4)2 crystal were investigated. The yb3+:LiGd(WO4)2 crystal exhibits a broad absorption band centered near 975 nm with the linewidths of 16 and 11 nm and maximal absorption cross-section of 3.60 × 10-20 and 2.90× 10-20 cm2 for π- and σ-polarization, respectively. The emission broadband has an FWHM of 47 and 45 nm with the emission cross sections of 3.92 × 10-20 and 3.34× 10-2o cm2 at 1020 nm for re- and or-polarization, respectively. The measured fluorescence lifetime is 398 gs. The blue light emission around 480 nm through cooperative upconversion from the de-excitation of excited Yb3+-Yb3+ pairs at 4 K was observed under 932-nm excitation and demonstrated. 展开更多
关键词 yb3+:LiGd(WO4)2 crystal Czochralski technique spectroscopic characteristics coopertive upconversion
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Spectral Properties and Upconversion Luminescence of Er^(3+),Yb^(3+):BaWO_4 Crystal 被引量:1
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作者 臧竞存 谢丽艳 +5 位作者 李晓 郭凯 刘国庆 邹玉林 吕超 冯宝华 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第5期578-584,共7页
The optical quality of Er^3+, yb^3+: BaWO4 crystal was gown by Czochralski method. Absorption spectra were measured and energy levels were assigned. According to Judd-Ofelt theory, the spectral strength parameters ... The optical quality of Er^3+, yb^3+: BaWO4 crystal was gown by Czochralski method. Absorption spectra were measured and energy levels were assigned. According to Judd-Ofelt theory, the spectral strength parameters of Er^3+ ion were fitted to beΩ2 =0.3926 x 10^-20 cm^2, Ω4 =0.0721×10^-20 cm^2, Ω6 =0.0028 ×10.20 cm^2. Emission peaks centered at around 523,544 and 670 nm were observed under 334 nm He-Cd laser excitation and emission peaks centered at 1001 and 1534 nm were detected under 976 nm laser excitation. Strong green emission was also observed when the crystal was pumped with 808 nm and 976 nm laser. The mechanisms of frequency upconversion and sensitization were analyzed. 展开更多
关键词 laser crystal UPCONVERSION Er^3+ yb^3+: BaWO4 crystal rare earths
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Yb∶CaGdAlO_(4)晶体及其超快激光技术研究进展
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作者 刘小虎 李坚富 +5 位作者 朱昭捷 涂朝阳 王阁阳 杨金芳 朱江峰 王燕 《人工晶体学报》 CAS 北大核心 2023年第7期1195-1207,共13页
Yb∶CaGdAlO_(4)(简写为Yb∶CALGO)晶体具有部分无序的结构、优秀的热学和光谱性质、吸收发射带宽,适合采用商用高功率InGaAs二极管泵浦以实现高功率超快激光运转,其较高的非线性折射率系数有利于对锁模激光器的优化。该晶体还具有能级... Yb∶CaGdAlO_(4)(简写为Yb∶CALGO)晶体具有部分无序的结构、优秀的热学和光谱性质、吸收发射带宽,适合采用商用高功率InGaAs二极管泵浦以实现高功率超快激光运转,其较高的非线性折射率系数有利于对锁模激光器的优化。该晶体还具有能级结构简单、本征量子缺陷低、辐射量子效率高等优点,是近年来新一代紧凑型、高效率、低成本激光二极管(LD)泵浦飞秒激光增益介质。本文简要介绍Yb∶CALGO的晶体结构、晶体生长、缺陷分析、热学性质和光谱性质等,并综合国内外学者近期的一些研究成果,重点综述了Yb∶CALGO晶体在半导体可饱和吸收镜、克尔透镜锁模的超快激光器及再生放大器超快激光技术中的最新研究进展。 展开更多
关键词 yb∶CaGdAlO_(4)晶体 晶体生长 热学性质 光谱性质 超快激光
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Method for fitting crystal field parameters and the energy level fitting for Yb^(3+) in crystal Sc_2O_3 被引量:1
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作者 张庆礼 宁凯杰 +5 位作者 肖进 丁丽华 周文龙 刘文鹏 殷绍唐 江海河 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第8期582-589,共8页
A method to compute the numerical derivative of eigenvalues of parameterized crystal field Hamiltonian matrix is given, based on the numerical derivatives the general iteration methods such as Levenberg-Marquardt, New... A method to compute the numerical derivative of eigenvalues of parameterized crystal field Hamiltonian matrix is given, based on the numerical derivatives the general iteration methods such as Levenberg-Marquardt, Newton method, and so on, can be used to solve crystal field parameters by fitting to experimental energy levels. With the numerical eigenvalue derivative, a detailed iteration algorithm to compute crystal field parameters by fitting experimental energy levels has also been described. This method is used to compute the crystal parameters of Yb^3+ in Sc2O3 crystal, which is prepared by a co-precipitation method and whose structure was refined by Rietveld method. By fitting on the parameters of a simple overlap model of crystal field, the results show that the new method can fit the crystal field energy splitting with fast convergence and good stability. 展开更多
关键词 crystal field parameter numerical derivative of matrix eigenvalue yb^3+Sc2O3 simple overlap model
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Up-conversion luminescence properties and energy transfer of Er^(3+)/Yb^(3+)co-doped oxyfluoride glass ceramic containing CaF_2 nano-crystals 被引量:1
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作者 马辰硕 焦清 +4 位作者 李龙基 周大成 杨正文 宋志国 邱建备 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期574-578,共5页
The Er^3+/yb^3+ co-doped transparent oxyfluoride glass-ceramics containing CaF2 nano-crystals were successfully prepared. After heat treatments, transmission electron microscopy (TEM) images showed that CaF2 nano-... The Er^3+/yb^3+ co-doped transparent oxyfluoride glass-ceramics containing CaF2 nano-crystals were successfully prepared. After heat treatments, transmission electron microscopy (TEM) images showed that CaF2 nano-crystals of 20-30 nm in diameter precipitated uniformly in the glass matrix. luminescence of Er^3+ at 540 nm and 658 nm was observed in Comparing with the host glass, high efficiency upconversion the glass ceramics under the excitation of 980 nm. Moreover, the size of the precipitated nano-crystals can be controlled by heat-treatment temperature and time. With the increase of the nano-crystal size, the intensity of the red emission increased more rapidly than that of the green emission. The energy transfer process of Er^3+ and Yb^3+ was convinced and the possible mechanism of Er^3+ up-conversion was discussed. 展开更多
关键词 NANO-crystalS up-conversion luminescence Er^3+/yb^3+ co-doped glass ceramics
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Growth and Properties of Yb:YAB Crystals
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作者 田丽莉 王继扬 +3 位作者 管庆才 魏景谦 潘恒福 刘耀岗 《Journal of Rare Earths》 SCIE EI CAS CSCD 1999年第4期312-315,共4页
Crystal growth and optical properties of YbxY1 - xAl(BO3)(4)(abbreviated as Yb:YAB) are reported. Experimental results indicate that K2Mo3O10 is the most favorable flux for the growth of Yb:YAB. Based on the measured ... Crystal growth and optical properties of YbxY1 - xAl(BO3)(4)(abbreviated as Yb:YAB) are reported. Experimental results indicate that K2Mo3O10 is the most favorable flux for the growth of Yb:YAB. Based on the measured refractive indices, type I phase matching angle is calculated as theta (m) ( I ) = 34 degrees 12', which agrees well with the experimental result, theta (m) ( I ) = 34 degrees 38'. In the absorption spectra of this crystal, there exist two absorption bands located at 956 and 975 nm, respectively, which are suitable for InGaAs diode laser pumping, pi polarized absorption is slightly stronger than sigma polarized absorption at room temperature. In the fluorescence spectra, there are two fluorescence peaks located at 1.03 and 1.04 mu m respectively. The fluorescence lifetime at 1.03 mu m is 1.379 ms. The estimated emission cross section is in the magnitude of 10(-21) cm(2). 展开更多
关键词 rare earths yb : YAB crystal crystal growth SPECTRUM
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Lasing properties of a Yb ion in tetragonal LuPO_4 and LuVO_4 isomorphic crystals: A comparative study
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作者 Xiao-Dan Dou Jing-Nan Yang +6 位作者 Jie He Li-Sha Wang Wen-Juan Han Hong-Hao Xu De-Gao Zhong Bing Teng Jun-Hai Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第5期257-264,共8页
A comprehensive investigation is carried out to compare the spectroscopic properties, absorption saturation behaviors and lasing properties of a Yb ion in tetragonal LuPO4 and LuVO4 isomorphic crystals. Significant di... A comprehensive investigation is carried out to compare the spectroscopic properties, absorption saturation behaviors and lasing properties of a Yb ion in tetragonal LuPO4 and LuVO4 isomorphic crystals. Significant distinctions are revealed in many aspects of the lasing behavior for the Yb ion doped in the two crystal hosts, and Yb:LuPO_4 proves to be superior to Yb:LuVO4 since it enables efficient laser action to be much more easily achieved. With a 0.6 mm thick crystal plate of Yb:LuPO4, an output power of 3.30 W can be generated with an optical–optical conversion efficiency of 50.8%; whereas with a 2 mm long miniature crystal rod, the output power produced can reach 8.35 W with an optical–optical conversion efficiency of 46.7%. 展开更多
关键词 yb ion lasing properties LuPO4 crystal LuVO4 crystal
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