室温下Er-Yb共掺磷酸盐玻璃微球的光学双稳态
Optical bistability in Er-Yb co-doped phosphate glass microspheres at room temperature
摘要：
实验研究了Er 3 +-Yb 3+磷酸盐玻璃微球在295 K下的光学双稳态。双稳态与Er 3+荧光和激光行为以及色开关相关。色切换的结果从一个内在的机制，利用紧密间隔的能级的热耦合，并同时发生的强度切换。色切换的对比度为3.2，并且强度切换示出550 nm的对比度为2.4，660 nm的荧光发射的对比度为1.8，1.5 μ m的IR激光的对比度为11。与这些观察同时，我们研究了表现出双稳态行为的抽运功率的温度依赖性吸收。的主机矩阵的激光和荧光机制的影响突出。
英文摘要：
We experimentally demonstrate optical bistability in Er3+-Yb3+ phosphate glass microspheres at 295 K. Bistability is associated with both Er3+ fluorescence and lasing behavior, and chromatic switching. The chromatic switching results from an intrinsic mechanism exploiting the thermal coupling of closely-spaced energy levels, and occurs simultaneously with the intensity switching. A contrast ratio of 3.2 has been obtained for chromatic switching, and the intensity switching shows ratios of 2.4 for 550 nm and, 1.8 for the 660 nm fluorescence emissions, and 11 for the IR lasing at 1.5 um. Concurrent with these observations, we investigate a temperature dependent absorption of pump power which exhibits bistable behavior. The influences of the host matrix on lasing and fluorescence mechanisms are highlighted.
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