摘要
对Bogatyryova等人近来提出的一种可分离位相的部分相干光的相干涡旋作了详细研究.这类新的光束由相同角向指数的拉盖尔-高斯(LG)模非相干叠加而成.研究表明,叠加LG模式的模指数,权重因子和参考点位置的选择都会影响圆刃型位错出现的位置,使得涡旋消失或出现多个相干涡旋.而且,LG模叠加而成的位相不可分离的部分相干光也存在相干涡旋.
The coherence vortices in a new class of partially coherent beams with separable phase recently proposed by Bogatyryova et al. are studied in detail. The new beams are generated by taking an incoherent superposition of Laguerre-Gaussian （LG） modes with equal azimuthal index. It is shown that the mode indices and weight factors of superposed LG modes, as well as the reference choice, affect the position where the circular edge dislocation takes place, and result in the vortex disappearance or the appearance of more than one coherence vortices. Furthermore, there also exist coherence vortices in partially coherent beams with non-separable phase consisting of an incoherent superposition of LG modes.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期2623-2628,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10574097)资助的课题~~
关键词
奇点光学
一类新的部分相干光束
相干涡旋
圆刃型位错
singular optics, a new class of partially coherent beams, coherence vortex, circular edge dislocation
