Xu Wei, Gao Xiaoyang, Zheng Longjiang, Zhang Zhiguo, Cao Wenwu
Condensed Mater Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
Opt Express. 2012 Jul 30;20(16):18127-37. doi: 10.1364/OE.20.018127.
Ho(3+)/Yb(3+) codoped glass ceramic was prepared by melt-quenching and subsequent thermal treatment. Under a 980 nm diode laser excitation, upconversion emissions from Ho(3+) ions centered at 540, 650, and 750 nm were greatly enhanced compared with those in the precursor glass. Especially, the short-wavelength upconversion emissions centered at 360, 385, 418, 445, and 485 nm were successfully obtained in the glass ceramic. An explanation for this phenomenon is given based on the fluorescence decay curve measurements. In addition, an optical temperature sensor based on the blue upconversion emissions from (5)F(2,3)/(3)K(8)→(5)I(8) and (5)F(1)/(5)G(6)→(5)I(8) transitions in Ho(3+)/Yb(3+) codoped glass ceramic has been developed. It was found that by using fluorescence intensity ratio technique, appreciable sensitivity for temperature measurement can be achieved by using the Ho(3+)/Yb(3+) codoped glass ceramic. This result makes the Ho(3+)/Yb(3+) codoped glass ceramic be a promising candidate for sensitive optical temperature sensor with high resolution and good accuracy.
采用熔融淬火及后续热处理制备了 Ho(3+)/Yb(3+) 共掺杂玻璃陶瓷。在 980 nm 二极管激光激发下，与前驱体玻璃相比，Ho(3+) 离子在 540、650 和 750 nm 处的上转换发射显著增强。特别是，在玻璃陶瓷中成功获得了以 360、385、418、445 和 485 nm 为中心的短波长上转换发射。基于荧光衰减曲线测量对这一现象给出了解释。此外，还开发了一种基于 Ho(3+)/Yb(3+) 共掺杂玻璃陶瓷中 (5)F(2,3)/(3)K(8)→(5)I(8) 和 (5)F(1)/(5)G(6)→(5)I(8) 跃迁产生的蓝色上转换发射的光学温度传感器。结果发现，通过使用荧光强度比技术，利用 Ho(3+)/Yb(3+) 共掺杂玻璃陶瓷可实现可观的温度测量灵敏度。这一结果使得 Ho(3+)/Yb(3+) 共掺杂玻璃陶瓷成为具有高分辨率和良好精度的灵敏光学温度传感器的有前途的候选材料。
