Results 51 to 60 of about 118 (95)

Study on optimization of nano-coatings for ultra-sensitive biosensors based on long-period fiber grating

Sensing and Bio-Sensing Research, 2020
Bio-chemical sensors are expected to offer high sensitivity and specificity towards the detection of an analyte. It has been found that optical sensors based on long period fiber gratings (LPFGs) meet most of these requirements, particularly when coated ...
Sankhyabrata Bandyopadhyay, Liyang Shao, Chao Wang, Shuaiqi Liu, Qiang Wu, Guoqiang Gu, Jie Hu, Yanjun Liu, Xiaolong Chen, Zhangqi Song, Xuefeng Song, Qiaoliang Bao, Mateusz Smietana   +12 more
doaj   +1 more source

Sensing characteristics of a metal film coated long-period fiber grating

Journal of Measurement Science and Instrumentation, 2017
To obtain the influence rules of the coating parameters of a long-period fiber grating（LPFG）with respect to temperature,strain and refractive index sensing properties,based on the mode coupling theory,a strict four-layer theorietical model of a metal ...
WANG Yan, LIU Jia-ping, LIU Ji-hong, HU Xing-liu, FANG Ting   +4 more
doaj  

Long Period Fiber Gratings Inscribed With an Improved Two-Dimensional Scanning Technique

IEEE Photonics Journal, 2014
We demonstrated a promising CO2 laser irradiation system based on an improved 2-D scanning technique. Such a system could be used to inscribe high-quality long period fiber gratings (LPFGs) with good reproducibility of grating inscription, which ...
Xiaoyong Zhong, Yiping Wang, Changrui Liao, Guolu Yin, Jiangtao Zhou, Guanjun Wang, Bing Sun, Jian Tang   +7 more
doaj   +1 more source

Fiber Grating Hydrogen Sensor: Progress, Challenge and Prospect

Advanced Sensor Research, Volume 3, Issue 2, February 2024.
This review focuses on the fiber grating hydrogen sensor which depicts a great promising for the industrial application, and mainly introduces the design and optimization methods for the sensor from sensor structure, hydrogen‐sensitive material and sensor durability perspectives, which is expected to provide some new ideas for its practical ...
Xiaofan Ping, Xi Cao, Chuanzhao Cao, Haodong Lei, Chaoran Yang, Qian Cheng, Tianyi Zhou, Mingyi Liu   +7 more
wiley   +1 more source

Highly Sensitive Two-Axis Bending Sensor Based on Arc-Induced Long Period Fiber Grating in Dual Side-Hole Fiber

IEEE Photonics Journal, 2018
A highly sensitive two-axis bending sensor based on long period fiber grating (LPFG) in a dual side-hole fiber (DSHF) is presented and experimentally investigated.
Yang Ouyang, Huiyong Guo, Xiaowei Ouyang, Xiaofeng Xu, Ciming Zhou, Ai Zhou   +5 more
doaj   +1 more source

An Optical Fiber Sensor and Its Application in UAVs for Current Measurements

Sensors, 2016
In this paper, we propose and experimentally investigate an optical sensor based on a novel combination of a long-period fiber grating (LPFG) with a permanent magnet to measure electrical current in unmanned aerial vehicles (UAVs).
Felipe S. Delgado, João P. Carvalho, Thiago V. N. Coelho, Alexandre B. Dos Santos   +3 more
doaj   +1 more source

Sensitivity Enhancement in Low Cutoff Wavelength Long-Period Fiber Gratings by Cladding Diameter Reduction

Sensors, 2017
The diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor of 3, to 2611 nm/refractive ...
Ignacio Del Villar, Matthew Partridge, Wenceslao Eduardo Rodriguez, Omar Fuentes, Abian Bentor Socorro, Silvia Diaz, Jesus Maria Corres, Stephen Wayne James, Ralph Peter Tatam   +8 more
doaj   +1 more source

Long-Period Grating with Asymmetrical Modulation for Curvature Sensing

Applied Sciences
We propose and demonstrate a curvature sensor based on long-period fiber grating (LPFG) with asymmetric index modulation. The LPFG is fabricated in single-mode fiber with femtosecond laser micromachining.
Lan Su, Xin Qiu, Rui Guo, Youbo Jing, Chaoshan Yang, Shuhui Liu   +5 more
doaj   +1 more source

A ZnO Nanoparticle-Coated Long Period Fiber Grating as a Carbon Dioxide Gas Sensor

Inventions, 2016
This study proposes a long period fiber grating (LPFG) with a zinc oxide (ZnO) nanoparticle layer for use as a carbon dioxide (CO2) gas sensor. Inductively coupled plasma (ICP) etching, corona treatment, and electrostatic spraying were used to fabricate ...
Chao-Wei Wu, Chien-Chung Wu, Chia-Chin Chiang   +2 more
doaj   +1 more source

Femtosecond Laser-Written Small-Period Long-Period Fiber Grating for an L-Band Normal Dispersion Mode-Locked Fiber Laser

Photonics
We utilize a femtosecond laser-inscribed small-period long-period fiber grating (SP-LPFG) to induce a nonlinear polarization rotation (NPR) effect for mode-locking pulses in a normal dispersion erbium-doped fiber laser (EDFL). The SP-LPFG has a length of
Qianying Li, Peiyun Cheng, Rong Zhao, Xuewen Shu   +3 more
doaj   +1 more source