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首页> 外文期刊>IEEE sensors journal >Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge
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Comparative Study of Long-Period Gratings Written in Standard and Fluorine-Doped Fibers by Electric Arc Discharge

机译：电弧放电在标准光纤和掺氟光纤中长周期光栅的比较研究

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摘要

In this paper, we present a comparative study of long-period gratings (LPGs) written in the standard Ge-doped fiber and in two different fluorine-doped fibers by means of the electric arc discharge (EAD)-based technique. Concerning Ge-doped fibers, we present an assessment of the EAD procedure by fabricating relatively short LPGs with deep attenuation bands (up to 32 dB) and trivial power losses. We also demonstrate the ability to manage the effect of the single EAD perturbation to select grating length, which in turn acts on the bandwidth of attenuation bands, without compromising depth. Furthermore, for the first time, we produced LPGs in F-doped fibers with attenuation bands deeper than 30 dB, demonstrating the dependence of the spectra on the grating period. Finally, we illustrate a comparative experimental study on the sensitivity of LPGs fabricated in the standard and F-doped fibers with surrounding refractive index (SRI) and temperature changes. We proved that the SRI response of LPGs in F-doped fibers is significantly higher than in the standard fiber and it strongly depends on the type of F-doped fiber considered. LPGs written in F-doped fibers exhibit a slightly lower temperature sensitivity (in the range 20–30 pm/°C for cladding mode) than the LPG in the standard fiber (45 pm/°C).
机译：在本文中，我们通过基于电弧放电（EAD）的技术，对在标准掺Ge光纤和两种不同掺氟光纤中写入的长周期光栅（LPG）进行了比较研究。关于掺Ge的光纤，我们通过制造具有较深衰减带（高达32 dB）和微不足道的功率损耗的相对较短的LPG，对EAD工艺进行了评估。我们还展示了管理单个EAD扰动影响以选择光栅长度的能力，而光栅长度反过来又作用于衰减带的带宽，而不会影响深度。此外，我们首次在衰减小于30 dB的F掺杂光纤中生产了LPG，证明了光谱对光栅周期的依赖性。最后，我们举例说明了在标准和F掺杂光纤中制造的LPG的灵敏度随周围折射率（SRI）和温度变化而进行的对比实验研究。我们证明，掺F的光纤中LPG的SRI响应显着高于标准光纤，这在很大程度上取决于所考虑的掺F光纤的类型。用F掺杂光纤编写的LPG的温度灵敏度（对于包层模式而言，在20-30 pm /°C范围内）比标准光纤（45 pm /°C）略低。

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