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研究多应力区光纤的应力各向异性振荡特性。首先采用COMSOL Multiphysics软件中的固体力学模块,研究了三应力、四应力、五应力区光纤主应力差的振荡幅度。结果表明,对于呈周期性幅向分布的多应力区,应力区块越多,各向异性周期振荡幅度就越小-三应力区光纤的振荡幅度最大,各向异性程度最高,四应力区次之,五应力区则最小。最后对不同形状应力块的三应力区光纤进行了研究,得到了应力区块的条状程度越高,其主应力差的振荡幅度也越高的结论。这些结论对于提高手征光纤的特性具有重要的意义。
Study the stress anisotropic oscillation of multi-stress zone optical fiber. First, the solid mechanics module in COMSOL Multiphysics software was used to study the oscillation amplitude of the main stress difference of three-stress, four-stress and five-stress optical fiber. The results show that for the multi-stress zone with periodic amplitude distribution, the more the stress zone, the smaller the amplitude of the anisotropic periodic oscillation - the highest amplitude of the three-stress zone optical fiber oscillation and the highest degree of anisotropy, The five stress zone is the smallest. Finally, the three stress zone optical fiber with different shaped stress blocks is studied, and the conclusion is drawn that the higher the stripe shape of the stress zone, the higher the oscillation amplitude of the main stress difference. These conclusions are of great significance for improving the properties of chiral fibers.