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Novel design of dual-core microstructured fiber with enhanced longitudinal strain sensitivity

机译：具有增强的纵向应变敏感性的双芯微结构纤维的新颖设计

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摘要

Constantly refined technology of manufacturing increasingly complex photonic crystal fibers (PCF) leads to new optical fiber sensor concepts. The ways of enhancing the influence of external factors (such as hydrostatic pressure, temperature, acceleration) on the fiber propagating conditions are commonly investigated in literature. On the other hand longitudinal strain analysis, due to the calculation difficulties caused by the three dimensional computation, are somehow neglected. In this paper we show results of such a 3D numerical simulation and report methods of tuning the fiber strain sensitivity by changing the fiber microstructure and core doping level. Furthermore our approach allows to control whether the modes' effective refractive index is increasing or decreasing with strain, with the possibility of achieving zero strain sensitivity with specific fiber geometries. The presented numerical analysis is compared with experimental results of the fabricated fibers characterization. Basing on the aforementioned methodology we propose a novel dual-core fiber design with significantly increased sensitivity to longitudinal strain for optical fiber sensor applications. Furthermore the reported fiber satisfies all conditions necessary for commercial applications like good mode matching with standard single-mode fiber, low confinement loss and ease of manufacturing with the stack-and-draw technique. Such fiber may serve as an integrated Mach-Zehnder interferometer when highly coherent source is used. With the optimization of single mode transmission to 850 nm, we propose a VCSEL source to be used in order to achieve a low-cost, reliable and compact strain sensing transducer.
机译：制造日益复杂的光子晶体光纤（PCF）的不断完善的技术催生了新的光纤传感器概念。文献中普遍研究了增强外部因素（例如静水压力，温度，加速度）对纤维传播条件的影响的方法。另一方面，由于三维计算所引起的计算困难，纵向应变分析被忽略了。在本文中，我们展示了这种3D数值模拟的结果，并报告了通过改变纤维的微观结构和纤芯掺杂水平来调节纤维应变敏感性的方法。此外，我们的方法允许控制模式的有效折射率是随应变而增加还是减少，并可以通过特定的光纤几何形状实现零应变敏感性。所提出的数值分析与所制造的纤维表征的实验结果进行了比较。基于上述方法，我们提出了一种新颖的双芯光纤设计，该设计对光纤传感器应用的纵向应变具有显着提高的灵敏度。此外，所报道的光纤满足了商业应用所需的所有条件，例如与标准单模光纤的良好模式匹配，较低的限制损耗以及易于使用叠放技术制造的条件。当使用高度相干的光源时，此类光纤可用作集成的Mach-Zehnder干涉仪。通过将单模传输优化到850 nm，我们建议使用VCSEL源，以实现低成本，可靠和紧凑的应变传感换能器。

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  • 来源
    《Optical sensing and detection III》|2014年|91410S.1-91410S.5|共5页
  • 会议地点 Brussels(BE)
  • 作者

    L. Szostkiewicz; T. Tenderenda; M.Napierala; M. Szymanski; M.Murawski; P. Mergo; P. Lesiak; P. Marc; L. R. Jaroszewicz; T. Nasilowski;

  • 作者单位

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Warsaw University of Technology, Faculty of Physics, Koszykowa 75, 00-662 Warszawa, Poland,Polish Center For Photonics And Fiber Optics' Foundation, Rogoznica 312, Rogoznica, Poland;

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    Maria Curie-SklodowskaUniversity, PI. Marii Curie-Sklodowskiej 5, 20-031 Lublin, Poland;

    Warsaw University of Technology, Faculty of Physics, Koszykowa 75, 00-662 Warszawa, Poland;

    Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

    InPhoTech Ltd, 17 Stominskiego st 31, 00-195 Warsaw, Poland,Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-980 Warsaw, Poland;

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