1 中国科学院福建物质结构研究所 光电子材料化学与物理重点实验室，福建 福州 350002
2 福州大学 化学学院，福建 福州 350108
3 中国福建光电信息科学与技术创新实验室（闽都创新实验室），福建 福州 350108
黄光激光在医疗美容、原子冷却与捕获、激光雷达等领域具有潜在的应用前景，因此，黄光激光器的研究具有重要意义。Dy3+因其4F9/2→6H13/2辐射跃迁而成为黄光激光的最佳激活离子，但是其在可见光波段为自旋禁戒跃迁，导致其吸收截面和发射截面都很小，从而引起黄光激光输出困难。本文通过提拉法成功生长了Dy3+∶Sr3Gd（BO3）3（缩写Dy3+∶SGB）、Dy3+/Tb3+∶SGB和Dy3+/Eu3+∶SGB晶体，通过室温偏振吸收谱、发射谱、荧光衰减曲线以及Judd-Ofelt理论计算分析了其光谱性能和能量传递机制。研究表明，共掺Tb3+和Eu3+增大了Dy3+在黄光波段的发射截面和荧光量子效率，有利于Dy3+的黄光输出。此外，证明了Dy3+/Tb3+∶SGB晶体中发生了Dy3+和Tb3+之间相互能量传递过程，Dy3+/Eu3+∶SGB晶体中仅有Dy3+→Eu3+的能量传递过程。
Sr3Gd（BO3）3 Dy3+ 黄光 光谱性能 能量传递 Sr3Gd（BO3）3 Dy3+ yellow emission spectral properties energy transfer
Author Affiliations
Abstract
1 Key Laboratory of Optoelectronic Materials Chemistry and Physics of CAS, Fujian Institute of Research on the Structure of Matter, CAS, Fuzhou, Fujian 350002, China
2 University of Chinese Academy of Sciences, Beijing 100039, China
3 Department of Photonics, National Sun Yat-sen University, Kaohsiung, Taiwan
4 Department of Applied Physics, East China Jiaotong University, Nanchang, Jiangxi 330013, China
In this paper, we reported a multiwavelength passively Q-switched Yb3+:GdAl3(BO3)4 solid-state laser with topological insulator Bi2Te3 as a saturable absorber (SA) for the first time, to the best of our knowledge. Bi2Te3 nanosheets were prepared by the facile solvothermal method. The influence of three Bi2Te3 densities on the laser operation was compared. The maximum average output power was up to 57 mW with a pulse energy of 511.7 nJ. The shortest pulsewidth was measured to be 370 ns with 110 kHz pulse repetition rate and 40 mW average power. The laser operated at three wavelengths simultaneously at 1043.7, 1045.3, and 1046.2 nm, of which the frequency differences were within the terahertz wave band. Our work suggests that solvothermal synthesized Bi2Te3 is a promising SA for simultaneously multiwavelength laser operation.
Lasers, diode-pumped Lasers, Q-switched Lasers, solid-state Lasers, ytterbium Photonics Research
2015, 3(3): 03000A97
中国科学院福建物质结构研究所, 福建 福州 350002
采用熔盐提拉法生长出φ20 mm×60 mm的优质Nd3+:KGd(WO4)2晶体,对晶体三个轴向的光谱进行测试研究表明a轴向的吸收和荧光谱峰最强,最适合于进行激光实验研究.用600 m波长的染料短脉冲(束腰为420μm)激光纵向抽运φ3.5 mm×30mm晶体激光器件,对1352.5 nm激光进行腔内拉曼散射频率自转换,在1539.5 m人眼安全波段实现了44μJ/pulse的激光输出,光-光转换效率为1.26%.用脉冲氙灯抽运φ3.5 mm×26 mm的激光器件,在1.067 μm处得到125.5 mJ的激光输出,激光阈值为≤1.6 mJ.在同等条件下对φ3.5 mm×35 mm的YAG:Nd激光晶体进行了激光实验研究和YAG:Nd3+晶体相比,KGW:Nd3+晶体具有激光阈值低、效率高和输出光为偏振光等优点,因此在小型激光器的应用方面具有明显的优势.
激光技术NcP:KGd(WOO4)2晶体 熔盐提拉法 光-能 激光性能
