通体均匀发光光纤的研究与设计

Research and Design of Uniform Side-glowing Optical Fiber

提出了一种侧面散射光光强均匀分布,能量利用合理,制备和安装成本低廉的通体发光光纤及其制备方法。在该光纤中散射体以不同的密度和深度分布在芯层和包层界面处的芯层内。当有传导光在光纤中传输时,部分传导光就会被散射体从光纤的侧面均匀地散射到光纤外。光纤侧面散射光强的均匀性是通过改变光纤不同位置处的衰减系数来实现的,而衰减系数的改变又是通过改变光纤不同位置处散射体的密度和深度来实现的。在建立数学模型的基础上,通过解微分方程,可以推导得出通体均匀发光光纤中衰减系数与传导光传播距离的变化关系公式。此外还提出了一种测定衰减系数与散射体密度以及深度关系的实验方法。这些研究分析为设计制造通体均匀发光光纤提供了思路和理论依据。

A new side-glowing optical fiber and its preparation methods are proposed. The fiber has the characters of uniform scattering light intensity, optimized energy distribution and low costing installation. This is essentially a cylindrical dielectric waveguide with the scattering matter distributed in the interface of the core and the cladding with different density and depth at different position. When light is propagating in the core, some light will be scattered by the scattering matter. The light will leak out from the fiber for scattering. The uniformity of the side-emitting light intensity can be realized by changing the attenuation coefficient of different propagation distance. The attenuation coefficient is correlative with the density and the depth of scattering matter. On the basis of a model, the relationship between the attenuation coefficient and the propagation distance can be deduced by solving a differential equation. Furthermore, a new experimental method used to study the relation between the attenuation coefficient and the density or the depth of the scattering matter is proposed. These efforts make a good preparation for the manufacture of a real uniform side-glowing optical fiber in the future.