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

Fu, Cailing; Wang, Yiping; Liu, Shen; Bai, Zhiyong; Liao, Changrui; He, Jun

doi:10.3390/s19204473

Cited by 21 publications

(7 citation statements)

References 111 publications

(288 reference statements)

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“…The details and more comprehensive introductions about the widespread applications of the HLPGs could be found in Refs. [69,70]. In this subsection, we concentrate on the applications of the HLPGs to the torsion sensors.…”

Section: Applications Of the Hlpgs 41 Applications Of The Hlpgs To Torsion Sensorsmentioning

confidence: 99%

Advances on Mode-Coupling Theories, Fabrication Techniques, and Applications of the Helical Long-Period Fiber Gratings: A Review

Zhao

2021

Photonics

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In this paper, we have briefly review the developing history and recent advances made with regard to helical long-period fiber gratings (HLPGs) in three aspects, i.e., the mode-coupling theories, the fabrication techniques, and the applications. It is shown that, due to the intrinsic helicity characteristics, which are especially suitable to control the loss, polarization, and orbit-angular-momentum (OAM) states of the light in optical fiber, HLPGs have recently attracted great research interest and have found various applications, such as the mode-converters, the torsion sensors, the band-rejection filters, wave plates, linear- and circular-light polarizers, and OAM mode generators, etc. It is believed that HLPGs and the HLPGs-based devices would find further applications to not only the fields of optical sensors and optical communication, but also other fields such as ultrahigh precision measurement, quantum optics, and biochemistry, etc.

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Section: Applications Of the Hlpgs 41 Applications Of The Hlpgs To Torsion Sensorsmentioning

confidence: 99%

Advances on Mode-Coupling Theories, Fabrication Techniques, and Applications of the Helical Long-Period Fiber Gratings: A Review

Zhao

2021

Photonics

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“…Helical long-period fiber grating (HLPG) belongs to a new kind of LPFG and is characterized by its spiral refractive index modulation [ 8 , 9 , 10 ]. Because of its inherent spiral structure, the HLPG has shown many unique advantages in sensing measurement [ 11 , 12 , 13 , 14 ]. For example, it is possible to simultaneously measure the torsion direction and torsion rate.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High-Sensitivity Optical Fiber Sensor by an Improved Arc-Discharge Heating System

Wang

Yuan

2023

Sensors

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We proposed a high-sensitivity optical fiber sensor based on a dual-resonance helical long-period fiber grating (HLPG). The grating is fabricated in a single-mode fiber (SMF) by using an improved arc-discharge heating system. The transmission spectra and the dual-resonance characteristics of the SMF-HLPG near the dispersion turning point (DTP) were studied through simulation. In the experiment, a four-electrode arc-discharge heating system was developed. The system can keep the surface temperature of optical fiber relatively constant during the grating preparation process, which shows an advantage in preparing high-quality triple- and single-helix HLPGs. In particular, benefiting from this manufacturing system, the SMF-HLPG operating near the DTP was successfully prepared directly by arc-discharge technology, without secondary processing of the grating. As a typical application example of the proposed SMF-HLPG, physical parameters such as temperature, torsion, curvature and strain can be measured with high sensitivity by monitoring the variation of the wavelength separation in the transmission spectrum. Therefore, the proposed sensor and its fabrication technology have potential application prospects in practical sensing measurement.

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“…Thus, the grating transmission spectrum exhibits several dips corresponding to those couplings at discrete wavelengths (wavelength selective optical filters). The resonance wavelengths and the amplitude of the dips depend on physical parameters such as temperature, strain, bending, torsion, pressure, and external refractive index and, therefore, they can be used in optical communications and sensing applications [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Among the different techniques available to produce LPFGs [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ...…”

Section: Introductionmentioning

confidence: 99%

Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part I: Fabrication, Characterization and Mechanisms of Formation

Rego

Caldas

Иванов

2021

Sensors

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In this work, we reviewed the most important achievements of INESC TEC related to the fabrication of long-period fiber gratings using the electric arc technique. We focused on the fabrication setup, the type of fiber used, and the effect of the fabrication parameters on the gratings’ transmission spectra. The theory was presented, as well as a discussion on the mechanisms responsible for the formation of the gratings, supported by the measurement of the temperature reached by the fiber during an electric arc discharge.

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

Cited by 21 publications

References 111 publications

Advances on Mode-Coupling Theories, Fabrication Techniques, and Applications of the Helical Long-Period Fiber Gratings: A Review

Advances on Mode-Coupling Theories, Fabrication Techniques, and Applications of the Helical Long-Period Fiber Gratings: A Review

Fabrication of High-Sensitivity Optical Fiber Sensor by an Improved Arc-Discharge Heating System

Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part I: Fabrication, Characterization and Mechanisms of Formation

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