High-sensitivity refractive index sensor based on microfiber long period gratings with CO2 laser line-by-line inscription

2016 ◽  
Author(s):  
Ruji Xu ◽  
Xiaojun Zhu ◽  
Chinhua Wang
Keyword(s):  
Refractive Index ◽  
Co2 Laser ◽  
High Sensitivity ◽  
Laser Line ◽  
Refractive Index Sensor ◽  
Long Period ◽  
Long Period Gratings

Temperature insensitive high-precision refractive-index sensor using two concatenated dual-resonance long-period gratings

2013 ◽  
Vol 38 (10) ◽  
pp. 1666 ◽  
Author(s):  
Saurabh Mani Tripathi ◽  
Wojtek J. Bock ◽  
Arun Kumar ◽  
Predrag Mikulic
Keyword(s):  
Refractive Index ◽  
High Precision ◽  
Refractive Index Sensor ◽  
Long Period ◽  
Long Period Gratings ◽  
Dual Resonance

Long-period grating refractive index sensor with a modified cladding structure for large operational range and high sensitivity

2006 ◽  
Vol 45 (24) ◽  
pp. 6142 ◽  
Author(s):  
Jian Yang ◽  
Li Yang ◽  
Chang-Qing Xu ◽  
Chenglin Xu ◽  
Weiping Huang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Long Period Grating ◽  
Long Period ◽  
Operational Range

High Sensitivity Refractive Index Sensor Based on Long Period Fiber Gratings in Line Mach-Zehnder Interferometer

2013 ◽  
Vol 658 ◽  
pp. 609-613 ◽  
Author(s):  
Jia Rong Zheng ◽  
Yong Qin Yu ◽  
Zhi Long Ou ◽  
Chen Lin Du ◽  
Pei Guang Yan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Temperature Response ◽  
High Sensitivity ◽  
Zehnder Interferometer ◽  
Refractive Index Sensor ◽  
Fiber Gratings ◽  
Refractive Index Measurement ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Mach Zehnder Interferometer

Mach-Zehnder interferometer formed by a pair of long period fiber gratings on single mode fiber is investigated as surrounding refractive index sensors. Interference fringes with bandwidth of 1.68 nm are induced by core mode and the excited cladding mode. High SRI sensitivity of 280.74 nm/RIU at 1437.74 nm in the range of 1.333 to 1.360 is achieved. Whilst the strain sensitivity (~0.33 nm/mε) and temperature response (~20.7 pm/°C) at 1428.64 nm are relatively low, which is superior in avoiding cross sensitivity in refractive index measurement.

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