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Refractive index sensor based on ultrafine tapered single-mode nocladding single-mode fiber structure

机译:基于超细锥形单模NoCladding单模光纤结构的折射率传感器

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摘要

A refractive index (RI) sensor based on a tapered no cladding fiber (NCF) is proposed theoretically and experimentally. The RI sensor is fabricated by splicing a NCF in the middle of two single mode fibers (SMF), and then the NCF is tapered to get lower waist diameter. Due to the lack of cladding, surrounding refractive index (SRI) can directly affect the light propagation of NCF, and the decrease of diameter can further improve the RI sensitivity by strengthening the evanescent field. The sensitivity with different lengths and waist diameters of NCF is investigated. It is observed that there are different linear relationships in different refractive interval and the RI sensitivity increases obviously with the waist diameter decreasing, especially when it is below 30 mu m. RI sensitivity of the sensor reaches 686 nm/RIU when the waist diameter is 13 mu m and SRI is at the range of 1.333-1.350. The sensor can be widely used in biosensing for its simple operation and high sensitivity at low SRI.
机译:理论上和实验,提出基于锥形覆层纤维(NCF)的折射率(RI)传感器。通过在两个单模纤维(SMF)的中间拼接NCF来制造RI传感器,然后NCF逐渐变细以获得较低的腰部直径。由于缺乏包层,周围折射率(SRI)可以直接影响NCF的光传播,并且直径的降低可以通过强化渐逝场进一步提高RI灵敏度。研究了NCF的不同长度和腰部直径的敏感性。观察到,在不同的折射间隔中存在不同的线性关系,并且RI灵敏度随着腰部直径的降低而显然增加,特别是当它低于30μm时。当腰部直径为13μmm和sri的范围为1.333-1.350时,传感器的敏感性达到686 nm / riu。该传感器可广泛用于生物传感器,在低SRI下的操作简单和高灵敏度。

著录项

  • 来源
    《Optical fiber technology》 |2019年第3期|297-302|共6页
  • 作者单位

    Beijing Informat Sci & Technol Univ Key Lab Minist Educ Optoelect Measurement Technol & Instr Beijing 100192 Peoples R China|Beijing Informat Sci & Technol Univ Beijing Lab Opt Fiber Sensing & Syst Beijing 100016 Peoples R China;

    Beijing Informat Sci & Technol Univ Key Lab Minist Educ Optoelect Measurement Technol & Instr Beijing 100192 Peoples R China|Beijing Informat Sci & Technol Univ Overseas Expertise Intro Ctr Discipline Innovat 1 Beijing 100192 Peoples R China;

    Tianjin Univ Sch Precis Instrument & Optoelect Engn Tianjin 300072 Peoples R China;

    Beijing Informat Sci & Technol Univ Key Lab Minist Educ Optoelect Measurement Technol & Instr Beijing 100192 Peoples R China;

    Beijing Informat Sci & Technol Univ Key Lab Minist Educ Optoelect Measurement Technol & Instr Beijing 100192 Peoples R China|Hefei Univ Technol Sch Instrument & Optoelect Engn Hefei 23009 Anhui Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Refractive index sensor; No cladding fiber; Multimode interference; Tapering;

    机译:折射率传感器;没有包层纤维;多模干涉;逐渐变细;

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