Results 1 to 10 of about 118 (95)

Characteristic control of long period fiber grating (LPFG) fabricated by infrared femtosecond laser

Frontiers of Optoelectronics, 2012
Long period fiber gratings (LPFGs) with different spectral characteristics were fabricated with 1 kHz, 50 fs laser pulses. The contrast of resonant rejection band can be significantly increased by a proper amount of axial stress along a fiber during laser writing or post-processing with lower energy density laser irradiation.
Nan Zhang, Li Wei, Xiaonong Zhu
exaly   +2 more sources

Feasibility of Fiber Bragg Grating and Long-Period Fiber Grating Sensors under Different Environmental Conditions

Sensors, 2010
This paper presents the feasibility of utilizing fiber Bragg grating (FBG) and long-period fiber grating (LPFG) sensors for nondestructive evaluation (NDE) of infrastructures using Portland cement concretes and asphalt mixtures for temperature, strain ...
Jian-Neng Wang, Jaw-Luen Tang
doaj   +3 more sources

Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

Sensors, 2019
We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films.
Yunlong Wang, Yunqi Liu, Fang Zou, Chen Jiang, Chengbo Mou, Tingyun Wang   +5 more
doaj   +3 more sources

3 W average-power high-order mode pulse in dissipative soliton resonance mode-locked fiber laser

Nanophotonics, 2021
Recently high-order modes (HOMs) lasers have been extensively investigated due to their potential applications in mode-division multiplexing. In this paper, we present two schemes of generating HOMs from the mode-locked fiber lasers (MLFLs) in the ...
Wang Longtao, Xu Jiangtao, Lu Jiafeng, Teng Linping, Luo Zhengqian, Pang Fufei, Zeng Xianglong   +6 more
doaj   +2 more sources

Simultaneous generation of first- to fourth-order OAM modes based on a cascaded preset-twist long-period fiber grating

Nanophotonics
We propose and demonstrate the simulation and fabrication of an all-fiber orbital angular momentum (OAM) mode converter capable of generating first- to fourth-order modes simultaneously, which is realized by inscribing a cascaded preset-twist long-period
Chang Wenzhe, Liu Yan-ge, Shi Zekun, Guo Huiyi, Wang Xin, Wang Pan, Wang Zhi   +6 more
doaj   +2 more sources

An Optical Fiber Viscometer Based on Long-Period Fiber Grating Technology and Capillary Tube Mechanism

Sensors, 2010
This work addresses the development and assessment of a fiber optical viscometer using a simple and low-cost long-period fiber grating (LPFG) level sensor and a capillary tube mechanism.
Jian-Neng Wang, Jaw-Luen Tang
doaj   +3 more sources

L-band filter-less wavelength tunable mode-locked fiber laser incorporating a long-period fiber grating

Results in Optics, 2023
The influences on the tuning range of a wavelength-tunable L-band mode-locked fiber lasers incorporating a long-period fiber grating (LPFG) are investigated.
Junjie Jiang, Yuehui Ma, Mingjiao Wang, Qianqian Huang, Lilong Dai, Zinan Huang, Yunqi Liu, Chengbo Mou   +7 more
doaj   +1 more source

An Axial Force Sensor Based on a Long-Period Fiber Grating with Dual-Peak Resonance

Photonics, 2023
A high-sensitivity axial force sensor with a large measurement range based on a dual-peak long-period fiber grating (LPFG) is proposed and experimentally demonstrated.
Weixuan Luo, Ying Wang, Qiang Ling, Zuguang Guan, Daru Chen, Qiong Wu   +5 more
doaj   +1 more source

Optimized Strain Long-Period Fiber Grating (LPFG) Sensors Operating at the Dispersion Turning Point [PDF]

Journal of Lightwave Technology, 2018
Two phenomena for enhancing the sensitivity of longperiod fiber gratings are combined toward an increase of the sensitivity to strain of this type of devices: the dispersion turning point (DTP) and the cladding diameter reduction by an etching process. The results prove that sensitivities up to 20 pm/με can be attained, which is a ten-fold improvement ...
Ignacio Del Villar, Omar Fuentes, Francesco Chiavaioli, Jesus M. Corres, Ignacio R. Matias   +4 more
openaire   +5 more sources

Transverse Load and Temperature Sensing Using Multiplexed Long-Period Fiber Gratings

Photonics, 2020
The simultaneous measurement of transverse load and temperature using two long-period fiber gratings multiplexed in the wavelength domain is presented experimentally.
Ismael Torres-Gómez, Alejandro Martínez-Rios, Gilberto Anzueto-Sánchez, Daniel. E. Ceballos-Herrera, Guillermo Salceda-Delgado   +4 more
doaj   +1 more source