多芯光纤光栅阵列形状传感及起搏器电极导线应用

Fiber Bragg grating is the most successful fiber optic passive device used in communication and sensing in recent years. TThree-dimensional (3D) shape sensors have great application prospects in minimally invasive surgery, and fiber gratings technique is considered as a promising candidate and high-efficient technique for shape sensing. Multi-core fiber has received wide attention not only in the field of ultra-large-capacity optical communication, but also in the optical sensing industry due to its unique characteristics such as compactness and multipath. Multi-core fiber gratings have a three-dimensional spatial distribution structure and are expected to be used to achieve high-precision three-dimensional shape sensing. This project plans to use a two-beam interference and cylindrical lens scanning technology to fabricate grating arrays on multi-core fiber. The goal of this project is to realize the three-dimensional integrated manufacturing of multi-core fiber grating arrays, and obtain a series of multi-core fiber grating arrays that can realize wavelength division and space division multiplexing. Then study its sensing characteristics to achieve vector bending, curve reconstruction and three-dimensional shape sensing..Finally, it is applied to the cardiac pacemaker electrode lead to realize the functions of on-line monitoring of the shape, vibration and temperature of the lead wire..The project intends to adopt double-beam interference technology to write FBGs arrays with different wavelengths in each core of a seven-core fiber so that FBGs can be three-dimensionally integrated, wavelength division multiplexing and space division multiplexing can be realized simultaneously, and the sensing and transmission capacity can be expanded. The prepared three-dimensional integrated MCF grating array is applied to the sensor network. There are three main innovations in this project: one is to develop a three-dimensional integrated multi-core fiber grating array with high-quality wavelength division multiplexing and space division multiplexing; the other is shape sensing technology based on multi-core fiber grating array; the third is a smart medical device based on a multi-core fiber grating array.

光纤光栅是近年来在通信和传感两大领域应用最为成功的光纤无源器件。三维（3D）形状传感器在微创医疗器械上有巨大应用前景，基于光纤光栅的三维形状传感器成为近年来的研究热点。多芯光纤，不仅在超大容量光通信领域受到广泛关注，还由于其紧凑性和多路径等独特特性而受到传感界的关注。而且，基于多芯光纤制备的光纤光栅具有三维空间分布结构，有望实现高精度的三维形状传感。本项目拟采用双光束干涉和柱透镜扫描技术，在多芯光纤上制备光栅阵列。目标是实现多芯光纤光栅阵列的三维集成制备，得到可实现波分和空分复用的多芯光纤光栅阵列。然后研究其传感特性，实现矢量弯曲、曲线重构和三维形状传感。最终将其应用于心脏起搏器电极导线上，在线监测导线的形状、振动、温度等。本项目的创新点主要有三：一是研究一种可波分复用可空分复用的多芯光纤光栅阵列制备技术；二是研究其高精度形状传感技术；三是研发基于多芯光纤光栅阵列的智能医疗器械。

多芯光纤布拉格光栅（MC-FBG）阵列形状传感器是多种应用的有力工具。三维形状传感器在表面形貌监测和微创医疗器械等领域上有巨大应用前景，而多芯光纤光栅具有特定三维空间分布，有望被用来实现高精度的三维形状传感。 然而，高效制备高质量的MC-FBG仍然是一个挑战。本项目提出并搭建了MC-FBG列双光束干涉法加工平台，研究激光参数对光栅质量的影响规律、激光动态调节等技术，形成系统的双光束干涉法加工光纤光栅阵列技术方案，光栅阵列加工能力、效率显著提升。研发了MC-FBG阵列、Moire光栅阵列、倾斜光栅、超长光栅阵列的工艺，获得了典型光栅阵列激光加工工艺优化方案。研究其三维形状传感机理和建立了多重重构的方法提高重构精度，研究了形状传感、横向压力、温度等传感特性。