现有的光纤折射率分布测量方法主要包括折射近场法、图像剪切法、近场扫描法、荧光法、端面反射法、图像翻转显微镜法、原子力蚀刻法、旋转镜偏移法、聚焦法、前或向后散射法、干涉法等。综合介绍折射近场法、近场扫描法、端面反射法、原子力蚀刻法、聚焦法等五种方法,同时说明各个方法的优缺点。 The existing measurement methods of refractive index distribution of optical fiber mainly include refractive near-field method, image shear method, near-field scanning method, fluorescence method, face reflection method, image inversion microscope method, atomic force etching method, rotating mirror offset method, , Forward or backscattering, interferometry and more. The methods of refraction near-field, near-field scanning, end-face reflection, atomic force etching and focusing are introduced. The advantages and disadvantages of each method are also described.