Preparation and characterization of highly transparent Ce3+ doped terbium gallium garnet single crystal
Preparation and characterization of highly transparent Ce3+ doped terbium gallium garnet single crystal
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DOI：
10.1016/j.optmat.2015.06.050
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发表时间：
2015-09
影响因子：
3.9
通讯作者：
Zhe Chen;Lei Yang;Y. Hang;Xiangyong Wang
中科院分区：
文献类型：
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作者：
Zhe Chen;Lei Yang;Y. Hang;Xiangyong Wang
采用提拉法生长了直径30 mm、长25 mm的掺铈铽镓石榴石（TCGG）晶体。研究了TCGG晶体中的阳离子分布和热膨胀系数。室温下在可见光和近红外区（VIS-NIR）的吸收光谱表明，该晶体在500-1500 nm具有较低的吸收系数。在室温下测量了单晶在532、633和1064 nm处的比法拉第旋光。晶体在633 nm处的费尔德常数达到164.3 rad m-1 T-1，比TGG的费尔德常数大26.3%。测量了薄膜的热导率和激光损伤阈值。总的来说，这里研究的TCGG单晶表现出比商业TGG到目前为止，上级性能，因此它有潜力，以满足不断增长的需求，新的和改进的法拉第旋转器在可见光-近红外区域。
A Ce3+doped terbium gallium garnet crystal (TCGG) with 30 mm in diameter and 25 mm in length has been grown by the Czochralski (Cz) method. The cation distributions in the TCGG crystal and thermal expansion coefficient have been investigated. Absorption spectrum was evaluated in the visible and near-infrared region (VIS–NIR) at room temperature, which indicated the crystal had low absorption coefficient at 500–1500 nm. The specific Faraday rotation of single crystal was measured at room temperature in 532, 633, and 1064 nm. The Verdet constant of the crystal at 633 nm comes up to 164.3 rad m−1T−1, 26.3% larger than that of TGG at 633 nm. The thermal conductivity and laser induced damage threshold (LIDT) were also measured. Overall, the TCGG single crystal studied here exhibits superior properties than the commercial TGG so far, therefore it has potential to cover the increasing demand for new and improved Faraday rotators in the VIS–NIR region.