Enhanced refractive index sensing characteristics of optical fibre long period grating coated with titanium dioxide thin films

2014 ◽  
Vol 202 ◽  
pp. 929-934 ◽  
Author(s):  
L. Coelho ◽  
D. Viegas ◽  
J.L. Santos ◽  
J.M.M.M.de Almeida
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Titanium Dioxide ◽  
Optical Fibre ◽  
Long Period Grating ◽  
Long Period ◽  
Refractive Index Sensing ◽  
Titanium Dioxide Thin Films ◽  
Sensing Characteristics

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.

scholarly journals Optical fibre long period grating gas sensor modified with metal organic framework thin films

2015 ◽  
Vol 221 ◽  
pp. 891-899 ◽  
Author(s):  
Jiri Hromadka ◽  
Begum Tokay ◽  
Stephen James ◽  
Ralph P. Tatam ◽  
Sergiy Korposh
Keyword(s):  
Thin Films ◽  
Gas Sensor ◽  
Optical Fibre ◽  
Metal Organic Framework ◽  
Long Period Grating ◽  
Long Period ◽  
Metal Organic ◽  
Organic Framework
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