Xin Hongbao, Lei Hongxiang, Zhang Yao, Li Xingmin, Li Baojun
State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Opt Express. 2011 Jan 31;19(3):2711-9. doi: 10.1364/OE.19.002711.
The removal of dielectric particles and bacteria from water is an extremely important global issue, particularly, for drinking and sanitation. This work provides a demonstration of optical purification of water using an optical fiber-ring. The size of particles suspended in water for trapping is 2.08 μm in diameter and the wavelength of light used for inducing photothermal effect is 1.55 μm with a power of 97 mW. The fiber, 6 μm in diameter, was formed to a racket-shaped ring with a minimum diameter of 167 μm and a maximum one of 350 μm. Experiment indicates that the particles moved toward the ring with the highest velocity of 4.2 μm/s and are trapped/assembled in the center of the ring once the laser beam of 1.55-μm wavelength was launched into the fiber. With a moving of the fiber-ring, the trapped/assembled particles were moved and the water can be purified by removal of the particles.
从水中去除介电粒子和细菌是一个极其重要的全球性问题，特别是对于饮用水和卫生设施而言。这项工作展示了利用光纤环对水进行光学净化。用于捕获的悬浮在水中的粒子直径为2.08μm，用于产生光热效应的光波长为1.55μm，功率为97mW。直径为6μm的光纤被制成球拍状环，最小直径为167μm，最大直径为350μm。实验表明，粒子以最高4.2μm/s的速度向环移动，一旦将1.55μm波长的激光束射入光纤，粒子就会被困在/聚集在环的中心。随着光纤环的移动，被困/聚集的粒子也会移动，通过去除粒子可实现水的净化。
