Fabrication and sensing characteristics of helical long-period fiber gratings written in the rotated fiber by CO2laser

2015 ◽  
Author(s):  
Liang Zhang ◽  
Yunqi Liu ◽  
Hongliang Song ◽  
Tingyun Wang
Keyword(s):  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Sensing Characteristics

Study on fabrication, spectrum and torsion sensing characteristics of microtapered long-period fiber gratings

Optik ◽  
2020 ◽  
Vol 207 ◽  
pp. 164445 ◽  
Author(s):  
Bingchuan Wang ◽  
Liyong Ren ◽  
Xudong Kong ◽  
Yiping Xu ◽  
Kaili Ren ◽  
...  
Keyword(s):  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Sensing Characteristics

Torsion sensing characteristics of long period fiber gratings fabricated by femtosecond laser in optical fiber

2016 ◽  
Vol 83 ◽  
pp. 94-98 ◽  
Author(s):  
Ji’an Duan ◽  
Zheng Xie ◽  
Cong Wang ◽  
Jianying Zhou ◽  
Haitao Li ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Fiber ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Sensing Characteristics

scholarly journals Sensing Characteristics of Tilted Long Period Fiber Gratings Inscribed by Infrared Femtosecond Laser

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3003 ◽  
Author(s):  
Jian Tang ◽  
Cailing Fu ◽  
Zhiyong Bai ◽  
Changrui Liao ◽  
Yiping Wang
Keyword(s):  
Refractive Index ◽  
Fiber Grating ◽  
Fiber Gratings ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Fs Laser ◽  
Period Fiber Grating ◽  
Application Fields ◽  
Sensing Characteristics

We propose a novel tilted long period fiber grating (TLPFG) design, inscribed using a line-by-line inscription technique and an infrared femtosecond (Fs) laser. The responses of this TLPFG to external refractive index, temperature, torsion, and strain were systematically investigated to determine its sensing characteristics. The external refractive index (RI) was measured to be −602.86 nm/RIU at an RI of ~1.432. The TLPFG was used to accurately measure temperatures up to 450 °C with a sensitivity of 103.8 pm/°C. The torsion and strain sensitivity of the device were 48.94 nm/(rad/mm) and −0.63 pm/µε, respectively. These results demonstrate that the proposed TLPFG could be used as sensors in a series of application fields including high temperatures and external environments.

scholarly journals Influence of InGaZnO Films with Different Ratios on Refractive Index Sensing Characteristics of LPFG

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 978
Author(s):  
Huanhuan Yan ◽  
Li Wang ◽  
Shufeng Li ◽  
Huisong Zhang ◽  
Jin Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Fiber Grating ◽  
Fiber Gratings ◽  
Long Period ◽  
Refractive Index Sensing ◽  
Long Period Fiber Gratings ◽  
Optical Fiber Sensing ◽  
Period Fiber Grating ◽  
Sensing Characteristics

Sensitive materials are widely used in the field of optical fiber sensing because of their unique advantages such as rich types, controllable composition ratio and diverse structure distribution. In this paper, the surface of long-period fiber gratings with InGaZnO [(In2O3):(Ga2O3):(ZnO)] nano films with different compositions were coated by pulse laser deposition (PLD) technology. The best sensing ratio and the high sensitivity sensing of the refractive index of long-period fiber grating (LPFG) were achieved through the analysis of the influence of different ratios of InGaZnO nano films on the refractive index sensing characteristics of grating. High sensitivities of 337 nm/RIU (refractive index unit) and 145 dB/RIU of the LPFG are achieved when the best doping ratio of InGaZnO is 7:1:2.

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