Numerical simulation of a gradient-index fibre probe and its properties of light propagation
Numerical simulation of a gradient-index fibre probe and its properties of light propagation
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DOI：
10.1088/1674-1056/20/11/114218
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发表时间：
2011-11
影响因子：
1.7
通讯作者：
王驰;毛幼馨;唐智;方臣;于瀛洁;齐博
中科院分区：
文献类型：
--
作者：
王驰;毛幼馨;唐智;方臣;于瀛洁;齐博
为了验证光学相干断层扫描（OCT）中梯度折射率（GRIN）光纤探头传播的光的特性，使用光学软件GLAD进行了数值模拟。首先给出了GRIN光纤探头的模型，该探头由单模光纤(SMF)、无芯光纤(NCF)、GRIN光纤透镜和气路组成。然后，采用GLAD软件数值研究NCF和GRIN光纤透镜的长度如何影响通过GRIN光纤探头的高斯光束聚焦性能。仿真结果与实验结果吻合较好，表明基于GLAD的数值仿真技术是验证光传播特性的直观有效的工具。本文发现，在GRIN光纤透镜长度恒定为0.1 mm、NCF长度为0.36 mm的条件下，探头的工作距离为0.75 mm，焦点尺寸为32 μm。
In order to verify the properties of the light propagating through a gradient-index (GRIN) fibre probe for optical coherence tomography (OCT), numerical simulation using the optical software GLAD is carried out. Firstly, the model of the GRIN fibre probe is presented, which is consisted of a single mode fibre (SMF), a no-core fibre (NCF), a GRIN fibre lens and an air path. Then, the software GLAD is adopted to numerically investigate how the lengths of the NCF and the GRIN fibre lens influence the performance of the Gaussian beam focusing through the GRIN fibre probe. The simulation results are well consistent with the experimental ones, showing that the GLAD based numerical simulation technique is an intuitive and effective tool for the verification of the properties of the light propagation. In this paper, we find that on the conditions of a constant GRIN fibre lens length of 0.1 mm and an NCF length of 0.36 mm, the working distance of the probe will be 0.75 mm and the focus spot size is 32 μm.