Opt Lett. 2018 May 15;43(10):2372-2375. doi: 10.1364/OL.43.002372.
The use of Yb codoping for enhancing the near-infrared (NIR) emission in Bi, Yb codoped PbF crystal was investigated for the first time, to the best of our knowledge. The NIR and visible fluorescence emission properties of the as-grown crystals were investigated in detail. It was found that the Yb ion can act as an effective charge compensated ion to bring about the conversion from Bi to Bi, enhancing the NIR fluorescence emission in Bi:PbF crystal. Moreover, the NIR fluorescence emission peaking at around 1090 and 1485 nm was demonstrated to be two different Bi related centers, Bi(I) and Bi(II), respectively. These results suggest that Bi, Yb codoped PbF crystal may become an attractive gain material for developing NIR broadband lasers under pumps of different wavelengths.
首次研究了 Yb 共掺在 Bi、Yb 共掺 PbF 晶体中增强近红外（NIR）发射的作用。据我们所知。详细研究了所生长晶体的近红外和可见荧光发射特性。结果发现，Yb 离子可以作为一种有效的电荷补偿离子，促使 Bi 转化为 Bi，从而增强 Bi:PbF 晶体的近红外荧光发射。此外，证明了在大约 1090 和 1485nm 处的近红外荧光发射分别对应于两个不同的 Bi 相关中心，即 Bi(I)和 Bi(II)。这些结果表明，Bi、Yb 共掺 PbF 晶体可能成为在不同波长泵浦下开发近红外宽带激光器的有吸引力的增益材料。
