New laser crystals based on CaF2:Nd with double buffer ions for high energy lasers applications
New laser crystals based on CaF2:Nd with double buffer ions for high energy lasers applications
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基于 CaF2:Nd 的新型激光晶体，具有双缓冲离子，适用于高能激光应用
DOI：
10.1109/cleo/europe-eqec52157.2021.9541556
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
P. Camy
中科院分区：
文献类型：
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作者：
C. Meroni;A. Braud;J. Doualan;C. Maunier;D. Penninckx;P. Camy
在钕掺杂的激光晶体中，萤石型单晶的掺杂揭示了在1μm处进行宽带、高能、短脉冲激光放大的独特可能性，这使得这些材料对各种高能激光应用具有吸引力，例如惯性约束聚变（ICF），其需要具有高重复率的非常高的能量激光脉冲以实现高效率。更准确地说，Nd掺杂的CaF 2晶体表现出高的热导率，和发射带一样宽的国家的最先进的Nd掺杂的玻璃目前用于激光放大的ICF，例如。本文采用吸收光谱、荧光光谱、激发光谱、时间分辨发射光谱、激发光谱和寿命测量等多种光谱技术，对共掺不同缓冲离子Gd，La，Ce，Y，Lu，Sc的CaF 2：Nd 3+单晶进行了全面、详细的光谱研究。最近的研究表明，非光学活性的缓冲X离子（如Y3+或Lu 3+）共掺杂可以破坏猝灭的Nd-Nd团簇，形成Nd-X发光团簇，从而显著提高Nd 3+的激光发射强度[1] [2]。
Within Neodymium doped laser crystals, the doping of fluorite-type single crystals reveals an unique possibility for broadband, high-energy, short-pulse laser amplification at 1µm, which makes these materials appealing to various high energy laser applications such as inertial confinement fusion (ICF), which require very high energy laser pulses with high repetition rates to achieve high efficiency. More precisely, Nd-doped CaF 2 crystals exhibit high thermal conductivity, and emission bands as wide as the state-of-the-art Nd-doped glasses currently employed in laser amplification for ICF for instance. In this work, a complete and detailed spectroscopic investigation of CaF 2 :Nd 3+ single crystals co-doped with different buffer ions, namely Gd, La, Ce, Y, Lu, Sc, was performed using several spectroscopy techniques including absorption, fluorescence, excitation spectra, time-resolved resolved emission and excitation spectroscopy and lifetime measurements. It was recently proven that co-doping with non-optically active "buffer" X ions like Y 3+ or Lu 3+ increases spectacularly Nd 3+ laser emission intensity by breaking quenched Nd-Nd clusters and forming instead Nd-X emitting clusters [1] [2] .