摘要
研究了部分相干贝塞尔光束经过光阑透镜聚焦后的光强分布。研究表明,部分相干贝塞尔光束在几何焦点附近的光强分布不仅取决于阶数和贝塞尔光束系数,还与相干度有关。据此,可以通过选择合适的参数,产生部分相干局域空心光束。产生的局域空心光束运用广泛,如微粒导引,捕获和诱导旋转等等。还有一些研究者采用局域空心光束来构成激光导管、光学镊子和光学扳手,从而实现微观粒子的精确、无接触操纵和控制。
This paper deals with an investigation of intensity distribution of the partially coherent Bessel beams focused by an aperture lens. It is found that the intensity distribution in the neighborhood of the geometrical focus is not only dependent on the topological charge and the radial frequency of the incident partially coherent Bessel beam, but also on its coherence length. Based on this, the desired partially coherent bottle beams can be obtained by choosing appropriate values ofparameters. It may be used extensively in microscopic particles guiding, trapping, and inducing rotation. To achieve the non-contact manipulation and control accurately the microscopic particles, some researchers compose the laser catheter, optical tweezers and optical wrench by the bottle beams.
出处
《三明学院学报》
2008年第4期368-373,共6页
Journal of Sanming University
基金
福建省教育厅科技项目(JA08240)
关键词
部分相干贝塞尔光束
透镜
传输特性
partially coherent Bessel beams
aperture lens
propagating properties
