The fabrication of long period fiber gratings (LPFGs) based on thin-cladding fiber (TCF) has been demonstrated by adopting electric-arc discharge (EAD) technique. In order to analyze the sensing characteristics of arc-induced TCF LPFGs, the refractive index (RI), temperature and strain sensing characteristics were also experimentally investigated, respectively. Compared with conventional LPFGs, the excellent performance of the LPFGs based on TCF is that it has a higher RI sensitivity for the same order cladding mode due to the stronger evanescent field of thinner cladding. The proposed LPFGs based on this simple fabrication method have a narrow full width at half maximum (FWHM), which provides the possibility for using as filters or sensors in the applications of optical communications or fiber-optic sensing.

已经通过采用电弧放电（EAD）技术证明了基于薄包层光纤（TCF）的长周期光纤光栅（LPFG）的制造。为了分析电弧感应TCF LPFG的传感特性，还分别通过实验研究了折射率（RI），温度和应变传感特性。与传统的LPFG相比，基于TCF的LPFG的出色性能是，由于较薄的包层的消失场更强，因此对于相同阶数的包层模式具有更高的RI灵敏度。基于这种简单的制造方法，提出的LPFG具有半高全宽（FWHM），这为在光通信或光纤传感应用中用作滤波器或传感器提供了可能性。