Department of Physics, Northwest University, Xi’an, Shaanxi, China.
Opt Lett. 2012 Feb 1;37(3):323-5. doi: 10.1364/OL.37.000323.
A novel reflective refractometer based on a thin-core fiber (TCF) sandwiched between a leading single-mode fiber (SMF) and a fiber Bragg grating (FBG) imprinted SMF stub was demonstrated. The reflection from the fiber stub occurs in two well-defined wavelength bands, corresponding to the Bragg core mode and cladding modes. The TCF section functions as a tailorable bridge between the FBG core mode reflection and the surrounding refractive index (SRI). Linear response with enhanced sensitivity of 133.26 dB/refractive index unit for temperature-immune SRI measurement within the biologically desirable sensing range of 1.33-1.41 has been achieved via cost-effective power detection.
一种基于在纤芯光纤（TCF）和光纤布拉格光栅（FBG）之间夹有一段先导单模光纤（SMF）的新型反射折射仪被演示出来。光纤短截线的反射发生在两个明确定义的波长带，对应于布拉格芯模和包层模。TCF 部分作为 FBG 芯模反射和周围折射率（SRI）之间的可调节桥。通过经济高效的功率检测，实现了温度免疫的 SRI 测量的生物适宜感测范围内 1.33-1.41 的线性响应，具有增强的灵敏度 133.26 dB/折射率单位。
