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稀土掺杂光纤对于诸如光纤激光器和光纤传感器等应用领域具有吸引力。美国索斯安普敦大学电子学与计算机科学系的光纤小组开发了一种新颖的溶液掺杂技术,这种技术胜过早期的一些掺杂方法。以往该光纤小组一直用汽相掺杂法制备单模和多模掺杂光纤,但发现,难以获得大于900×10_(-6)摩尔的纤芯掺杂浓度(低浓度掺杂光纤激光器需要用这种纤芯)。这一方法需要精密地控制温度,因而限止了两种稀土离子共同掺杂的可能性。
Rare-earth doped optical fibers are attractive for applications such as fiber lasers and fiber optic sensors. The fiber team at the Department of Electronics and Computer Science at Southampton University in the United States developed a novel solution doping technique that outperformed earlier doping methods. In the past, this group of optical fibers has been used to prepare single mode and multimode doped optical fibers by the vapor phase doping method. However, it has been found that it is difficult to obtain a core doping concentration of more than 900 × 10 -6 moles (low concentration doped fiber laser This core). This method requires precise temperature control, thus limiting the possibility of both rare earth ions co-doping.