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Bifunctional LaxNdyGdzSc4−x−y−z(BO3)4 crystal: Czochralski growth, linear and nonlinear optical properties, and near-infrared laser emission performances
Optics & Laser Technology ( IF 5 ) Pub Date : 2020-06-30 , DOI: 10.1016/j.optlastec.2020.106433
Madalin Greculeasa , Alin Broasca , Flavius Voicu , Stefania Hau , Gabriela Croitoru , George Stanciu , Cristina Gheorghe , Nicolaie Pavel , Lucian Gheorghe

High optical quality LaxNdyGdzSc4−x−y−z(BO3)4 (Nd:LGSB) single crystal has been obtained by the Czochralski technique. The crystal composition was found to be La0.721Nd0.046Gd0.452Sc2.781(BO3)4. Low-temperature spectroscopic investigations revealed that the Nd3+ ions enter only in La3+ ions sites. The main nonlinear optical (NLO) properties of Nd:LGSB (4.6 at.%) crystal were found to be comparable to those of yttrium aluminum borate (YAB) crystal. Laser emission at 1.06 µm with 24.5 mJ energy per pulse for 35.6 mJ absorbed pump pulse energy at 807 nm and 0.71 slope efficiency has been obtained from a c-cut Nd:LGSB (4.6 at.%) uncoated crystal sample with 6.14 mm length. Slope efficiency as high as 0.73 was obtained from an uncoated 2.96 mm thick a-cut sample. The good NLO properties of Nd:LGSB crystal together with the excellent near-infrared laser performances, recommends Nd:LGSB as a very promising bifunctional crystal in self-frequency doubling configuration.



中文翻译:

双功能La x Nd y Gd z Sc 4−x−y−z(BO 34晶体:直拉晶体生长,线性和非线性光学性质以及近红外激光发射性能

通过Czochralski技术已经获得了高光学质量的La x Nd y Gd z Sc 4-x-y-z(BO 34(Nd:LGSB)单晶。发现晶体组成为La 0.721 Nd 0.046 Gd 0.452 Sc 2.781(BO 34。低温光谱研究表明Nd 3+离子仅在La 3+中进入离子位点。发现Nd:LGSB(4.6 at。%)晶体的主要非线性光学(NLO)特性与硼酸钇铝(YAB)晶体相当。从c切割Nd:LGSB(4.6 at。%)长度为6.14 mm的未镀膜晶体样品中,获得了1.06 µm的激光发射,每个脉冲24.5 mJ的能量对于35.6 mJ的吸收泵浦脉冲能量在807 nm处的吸收效率为0.71 。从未经涂覆的2.96毫米厚的A型切割样品获得的倾斜效率高达0.73 。Nd:LGSB晶体的良好NLO性能以及出色的近红外激光性能,建议Nd:LGSB作为自倍频配置中非常有前途的双功能晶体。

更新日期:2020-06-30
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