Mode-filtered large-core fiber for optical coherence tomography.
Mode-filtered large-core fiber for optical coherence tomography.
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DOI：
10.1364/ao.51.008262
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发表时间：
2012-12-01
期刊：
影响因子：
1.9
通讯作者：
Chen Z
中科院分区：
文献类型：
--
作者：
Moon S;Chen Z
我们研究了多模光纤在光学相干层析成像（OCT）中的使用，该光学相干层析成像具有选择性地抑制高阶模（HOM）的功率的模式滤波器。大芯径光纤（LCF）是一种具有中等导模数的单模光纤，其模场面积大，输出光的瑞利范围宽，如果在LCF中间安装一个模滤波器，可以有效地滤除LCF中的高阶模，则LCF是一种很有吸引力的单模光纤的替代方案。为此，本研究发展了一种简单的光纤圈模式滤波器模式滤波方案。LCF是由一个最佳的弯曲半径与光纤缠绕机，专门设计用于制造低损耗模式滤波器均匀盘绕。利用共光路OCT系统验证了模式滤波LCF在OCT成像中的可行性。它已被成功地证明，我们的模式过滤LCF可以提供一个有用的成像或传感探头，而无需物镜透镜，大大简化了结构的探测光学。
We have investigated the use of multimode fiber in optical coherence tomography (OCT) with a mode filter that selectively suppresses the power of the high-order modes (HOMs). A large-core fiber (LCF) that has a moderate number of guiding modes was found to be an attractive alternative to the conventional single-mode fiber for its large mode area and the consequentially wide Rayleigh range of the output beam if the HOMs of the LCF were efficiently filtered out by a mode filter installed in the middle. For this, a simple mode filtering scheme of a fiber-coil mode filter was developed in this study. The LCF was uniformly coiled by an optimal bend radius with a fiber winder, specially devised for making a low-loss mode filter. The feasibility of the mode-filtered LCF in OCT imaging was tested with a common-path OCT system. It has been successfully demonstrated that our mode-filtered LCF can provide a useful imaging or sensing probe without an objective lens that greatly simplifies the structure of the probing optics.