Esposito Flavio, Ranjan Rajeev, Campopiano Stefania, Iadicicco Agostino
Department of Engineering, University of Naples "Parthenope", Centro Direzionale Isola C4, 80143 Napoli, Italy.
Institute for Microelectronics and Microsystems, National Research Council, 80131 Napoli, Italy.
Sensors (Basel). 2018 Mar 20;18(3):918. doi: 10.3390/s18030918.
In this work, we report about our recent results concerning the fabrication of Long Period Grating (LPG) sensors in several optical fibers, through the Electric Arc Discharge (EAD) technique. In particular, the following silica fibers with both different dopants and geometrical structures are considered: standard Ge-doped, photosensitive B/Ge codoped, P-doped, pure-silica core with F-doped cladding, Panda type Polarization-maintaining, and Hollow core Photonic crystal fiber. An adaptive platform was developed and the appropriate "recipe" was identified for each fiber, in terms of both arc discharge parameters and setup arrangement, for manufacturing LPGs with strong and narrow attenuation bands, low insertion losses, and short length. As the fabricated devices have appealing features from the application point of view, the sensitivity characteristics towards changes in different external perturbations (i.e., surrounding refractive index, temperature, and strain) are investigated and compared, highlighting the effects of different fiber composition and structure.
在这项工作中，我们报告了我们最近通过电弧放电（EAD）技术在几种光纤中制造长周期光栅（LPG）传感器的结果。特别地，考虑了具有不同掺杂剂和几何结构的以下几种石英光纤：标准锗掺杂光纤、光敏硼/锗共掺杂光纤、磷掺杂光纤、包层氟掺杂的纯石英芯光纤、熊猫型保偏光纤以及空心光子晶体光纤。开发了一个自适应平台，并针对每种光纤确定了合适的“配方”，包括电弧放电参数和装置布置，以制造具有强而窄的衰减带、低插入损耗和短长度的长周期光栅。由于所制造的器件从应用角度具有吸引人的特性，因此对其针对不同外部扰动（即周围折射率、温度和应变）变化的灵敏度特性进行了研究和比较，突出了不同光纤成分和结构的影响。
