Refractive index sensing characteristics of dual resonance long period gratings in bare and metal-coated D-shaped fibers

2009 ◽  
Vol 48 (31) ◽  
pp. G53 ◽  
Author(s):  
Saurabh Mani Tripathi ◽  
Emmanuel Marin ◽  
Arun Kumar ◽  
Jean-Pierre Meunier
Keyword(s):  
Refractive Index ◽  
Long Period ◽  
Refractive Index Sensing ◽  
Long Period Gratings ◽  
Dual Resonance ◽  
Sensing Characteristics ◽  
Shaped Fibers

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

scholarly journals Sensing Characteristics of Side-Hole Fiber-Based Long-Period Grating

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yi Xin ◽  
Xinyong Dong ◽  
Junwei Yuan ◽  
Yi Li ◽  
Shangzhong Jin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Blue Shift ◽  
Effective Index ◽  
Long Period Grating ◽  
Side Hole ◽  
Long Period ◽  
Long Period Gratings ◽  
Laser Sensing ◽  
Surrounding Refractive Index ◽  
Sensing Characteristics

Long-period gratings (LPGs) have been fabricated in a side-hole fiber (SHF) by using a pulsed CO2laser. Sensing characteristics of this SHF-LPG to temperature surrounding refractive index and bend have been investigated. Experimental results show that resonant wavelength of the SHF-LPG has a blue shift with temperature with sensitivity of −0.11 nm/°C, a blue shift with increasing sensitivity with surrounding refractive index ranging from 1.335 to 1.44 (the maximum sensitivity is achieved when the surrounding refractive index reaches the effective index of the fiber cladding), and a red shift with bend-direction-dependent sensitivity up to 9.36 nm/m−1.

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