Sensor based on macrobent fiber Bragg grating structure for simultaneous measurement of refractive index and temperature

2016 ◽  
Vol 55 (4) ◽  
pp. 791 ◽  
Author(s):  
Tiegen Liu ◽  
Yaofei Chen ◽  
Qun Han ◽  
Fangchao Liu ◽  
Yunzhi Yao
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Simultaneous Measurement ◽  
Bragg Grating ◽  
Grating Structure

Simultaneous Measurement of Temperature and Refractive Index Using a Fiber Bragg Grating and a Multimode Fiber

2011 ◽  
Vol 130-134 ◽  
pp. 4053-4056
Author(s):  
Zheng Rong Tong ◽  
Yang Guo ◽  
Xiu Feng Yang ◽  
Ye Cao
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Simultaneous Measurement ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Bragg Grating ◽  
Multimode Fiber ◽  
Compact Size ◽  
Good Operation

We introduce an all-fiber sensor capable of simultaneous measurement of temperature and refractive index (RI). The sensor system consists of a single mode fiber Bragg grating (FBG) and a single-mode-multimode-single-mode (SMS) structure which serves as a Mach-Zehnder interferometer (MZI), and the multimode fiber (MMF) is etched by hydrofluoric acid solution. The experimental results demonstrate that the temperature sensitivities of FBG and MZI are 0.016nm/°C and 0.093nm/°C, respectively, and the RI sensitivity of MZI achieves 226.25nm/RIU. The interesting properties of the sensor include compact size, high sensitivity and good operation linearity.

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