中国激光, 2009, 36 (s2): 125, 网络出版: 2009-12-30
基于大芯径多模光纤模式干涉的光纤折射率测量 
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Refractometry Based on Multimode Optic Fiber with Large Core
测量 折射率测量 光纤光学 光纤传感 大芯径多模光纤 measurement refractometry fiber optics optical fiber sensor multimode fiber with large core
摘要
开展了利用大芯径多模光纤(MMF)实现折射率测量的理论分析仿真以及实验研究。方法是将包层/纤芯半径为62.5/52.5 μm的多模光纤通过单模光纤接入光纤系统,实现单模多模单模(SMS)光纤结构,利用该结构对周围折射率的敏感性实现折射率测量。解调借助于宽带放大自发辐射(ASE)光源和光谱分析仪(OSA)实现。给出了影响折射率测量精度的因素,提出了借助于氢氟酸(HF)腐蚀实现折射率灵敏度的调节方法。实验结果证实了该方法的有效性。
Abstract
Refractometry based on multimode optical fiber with large core is presented. The multimode fiber (MMF) with the cladding/core radius 62.5/50 μm is connected with normal single mode fiber,which composes a single-multi-single (SMS) mode fiber structure. The structure is sensitive to the surrounding refractive index and is used as a refractometry. The demoducation system is made of the broadband amplified spontaneous emission (ASE) source and optical spectral analysis (OSA). A simple theoretical analysis of the refractometry is given and a HF corrosion method is proposed to enhance the performance of the refractometry. Experimental results prove the feasibility of the refractometry.
王凯军, 张建中, 彭石军, 高麒麟, 孙伟民, 苑立波, 彭刚定. 基于大芯径多模光纤模式干涉的光纤折射率测量[J]. 中国激光, 2009, 36(s2): 125. Wang Kaijun, Zhang Jianzhong, Peng Shijun, Gao Qili, Sun Weimin, Yuan Libo, Peng Gangding. Refractometry Based on Multimode Optic Fiber with Large Core[J]. Chinese Journal of Lasers, 2009, 36(s2): 125.
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