Fabrication of Phase-Shifted Long-Period Fiber Grating and Its Application to Strain Measurement

Wang, Peng; Xian, Lunlun; Li, Hongpu

doi:10.1109/lpt.2014.2385067

Cited by 26 publications

(10 citation statements)

References 17 publications

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“…The separation change between the two split peaks of SLPFGs exhibited a high strain sensitivity of about 106.7 pm/με [61]. Moreover, using a phase-shifted SLPFG fabricated by CO 2 laser beam, a temperature-insensitive sensor that allows for large axial strain measurement with a value up to 7600 με is demonstrated [62]. Ren et al developed a strain sensor with a sensitivity of 1.2 pm/με based on a microtapered SLPFG fabricated by periodically tapering a SMF with CO 2 laser heating source [63].…”

Section: Strain Sensorsmentioning

confidence: 99%

“…Various heating-induced LPFGs in conventional fiber [12,13,22,28,35,46,47], photonic crystal fiber (PCF) [14,15,16,29,48], and photonic bandgap fiber (PBF) [27,30,31] could then be successfully written. LPFG-based devices have recently attracted great attention and found versatile applications, such as in all-fiber orbital angular momentum (OAM) mode converters [11,13,14,17,49,50,51,52,53,54,55,56], and strain [48,57,58,59,60,61,62,63,64], pressure [16,29,30,65,66], torsion [16,19,38,46] and biochemical sensors [67,68,69,70,71,72,73].…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Wang

Liu

et al. 2019

Sensors

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This paper presents a review of our work concerning the recent progress in fabrications and applications of heating-induced long period fiber gratings (LPFGs). Firstly, three kinds of heating fabrication techniques based on CO2 laser, hydrogen–oxygen flame and arc discharge are demonstrated to fabricate LPFGs, i.e., standard LPFGs (SLPFGs) and helical LPFGs (HLPFGs), in different types of optical fibers such as conventional fibers, photonic crystal fibers, and photonic bandgap fibers. Secondly, the all-fiber orbital angular momentum (OAM) mode converters based on heating-induced SLPFGs and HLPFGs in different types of fibers are studied to increase the transmission capacity. Finally, the heating-induced SLPFGs and HLPFGs are investigated to develop various LPFG-based strain, pressure, torsion and biochemical sensors.

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Section: Strain Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Wang

Liu

et al. 2019

Sensors

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“…The results showed that the sensitivity of the I-LPFG strain sensor was −5.62 pm/με. In 2015, Wang et al [ 8 ] proposed phase-shifted LPFG fabricated by CO 2 laser for strain measurement. Three kinds of phase-shifted LPGs with phase shifts of 0, 0.5π, and 1.0π respectively, were fabricated.…”

Section: Introductionmentioning

confidence: 99%

Application of Robust, Packaged Long-Period Fiber Grating for Strain Measurement

Hsieh

et al. 2016

Micromachines

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This paper proposes an optical fiber strain sensor based on packaged long-period fiber gratings (PLPFG) which is fabricated by the micro-electromechanical systems (MEMS) process and packaged with poly-dimethylsiloxane (PDMS) polymer materials. The optical fiber sensor packaged with PDMS improves robustness effectively. The proposed PLPFG sensors have periods of 610, 650, 660 μm and fiber diameter of 48, 60, 72 μm, respectively. The resonance dip of the PLPFG grows when a strain loaded onto the sensor. The results show that the largest strain sensitivity of the PLPFG strain sensor was −0.0652 dB/με from 0–1200 με and the linearity (R2) was 0.9812. Accordingly, the proposed PLPFG sensor has good potential for high-sensitivity strain sensing applications.

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“…Cladding modes play an important role in realizing fiber-optic sensors based on LPFGs with high sensitivity to external perturbation change, such as temperature and strain [1][2][3]. There is much research on the development of fabrication techniques of LPFGs [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A conventional LPFG can be simply fabricated by exposing single-mode fibers (SMFs) with a germanium-doped core to UV excimer lasers and frequency-doubled argon lasers [1].…”

Section: Introductionmentioning

confidence: 99%

“…A conventional LPFG can be simply fabricated by exposing single-mode fibers (SMFs) with a germanium-doped core to UV excimer lasers and frequency-doubled argon lasers [1]. For specialty fibers without photosensitivity, such as photonic crystal fibers (PCFs), different fabrication techniques are required to generate the periodic index modulation for the realization of LPFGs [2,[6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The etching method to induce the periodic deformation of the silica cladding in the dispersion-shifted fiber (DSF) was proposed by using a hydrofluoric acid (HF) solution incorporating the metal coating procedure [16].…”

Section: Introductionmentioning

confidence: 99%

Transmission Characteristics of Long-Period Fiber Gratings Using Periodically Corroded Single-Mode Fibers

Lee

Bang

Han

2015

Journal of the Optical Society of Korea

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Transmission characteristics of long-period fiber gratings (LPFGs) fabricated by periodically etching a conventional single-mode fiber (SMF) are investigated. After coating the SMF with photoresist, the cladding of the SMF is symmetrically and periodically removed by using a wet etching technique resulting in the formation of the LPFG. Tensile strain reinforces the coupling strength between the core and the cladding mode based on the photoelastic effect. The extinction ratio of the SMF-based LPFG at a wavelength of 1550.8 nm is measured to be -15.1 dB when the applied strain is 600 µε . The ascent of ambient index shifts the resonant wavelength to shorter wavelength because of the increase of the effective refractive index of the cladding mode. The extinction ratio is diminished by increase in the ambient index because of the induction of the optical attenuation of the cladding mode. The transmission characteristics of the proposed LPFG with variations in torsion are also measured. The photoelastic effect based on torsion changes the extinction ratio and the resonant wavelength of the proposed SMF-based LPFG. The polarization-dependent loss of the LPFG is also increased by torsion because of the torsion-induced birefringence. The polarization-dependent loss of the LPFG at torsion of 8.5 rad/m is measured to be 3.9 dB.

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Fabrication of Phase-Shifted Long-Period Fiber Grating and Its Application to Strain Measurement

Cited by 26 publications

References 17 publications

Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Application of Robust, Packaged Long-Period Fiber Grating for Strain Measurement

Transmission Characteristics of Long-Period Fiber Gratings Using Periodically Corroded Single-Mode Fibers

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