Fabrication and characterization of helical long-period fiber gratings in single-mode fibers

Wang, Xingpeng; Wang, Dongdong; Wang, Qi; Xian, Lunlun; Li, Li

doi:10.1016/j.ijleo.2017.12.006

Cited by 11 publications

(8 citation statements)

References 20 publications

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“…The twist sensitivity of 34.7 pm/°at dip 3 and 9.5 pm/°at dip 4 can be obtained. The obtained sensitivity of the propose structure is 3 times higher than that of the HLPFG [7] and 10 times higher than that of pre-twist MZI [19].…”

Section: Twist Experimentsmentioning

confidence: 78%

“…The temperature sensitivity of the proposed structure is at the same level as that in the Refs. [7], [19].…”

Section: Temperature Experimentsmentioning

confidence: 99%

“…The detailed information is as follows: sensors using optical fiber grating [1], sensors based on mode interference, and multi-core fiber based sensors [14]. Until now, a quantity of optical twist sensors based on different types fiber grating have been demonstrated, which include 81°tilted fiber Bragg grating (T-FBG) [4], multi phase shift helical long period fiber grating (MPS-HLPFG) [10], ultra-long period fiber grating (U-LPFG) [18] and so on [7], [8]. Some special fiber gratings are very expensive and complex to prepare, which will hinder its application in practice.…”

Section: Introductionmentioning

confidence: 99%

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An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

Lü

et al. 2020

IEEE Photonics J.

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A new optical fiber twist sensor with temperature compensation mechanism is designed and experimentally demonstrated. The main structure of this twist sensor is a torsion perturbation point cascaded with single mode-multimode-single mode (SMS) fiber structure. The experimental results show that the twist sensor has ability to distinguish the twist direction with sensitivities of 9.5 pm/°and 34.7 pm/°at the chosen dips in the range from −100°(CCW) to 140°(CW). Furthermore, the temperature response characteristic of the sensor is also researched through experiment. Temperature sensitivities of 71.8 pm/°C and 65.2 pm/°C can be obtained at the same dips in the range from 20°C to 75°C. In addition, the temperature's influence can be compensated with post-measurement calculation through the cross-matrix. The theoretical resolutions of twist and temperature simultaneous measurement are ±0.084°and ±0.32°C, respectively.

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Section: Twist Experimentsmentioning

confidence: 78%

“…The temperature sensitivity of the proposed structure is at the same level as that in the Refs. [7], [19].…”

Section: Temperature Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

Lü

et al. 2020

IEEE Photonics J.

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“…HLPFGs were fabricated by method of twisting SMFs while heating, exposing to CO 2 laser in Ref. [16], which is easily to deform the optical fiber and a stepped structure is formed to increase the loss. To solve this problem, a new fabrication method is designed that the heating process is after the twisting process when etching one period of the grating.…”

Section: Fabricationmentioning

confidence: 99%

“…The HLPFGs were first fabricated by Poole et al in a two-mode fiber [14]. X. P. Wang et al has presented a new system for HLPFG fabrication, in which a single-side CO 2 laser is used [16]. The quality of the HLPFG fabricated by this method is uneven because of the unilateral heating.…”

Section: Introductionmentioning

confidence: 99%

Sensing Characterization of Helical Long Period Fiber Grating Fabricated by a Double-Side CO₂ Laser in Single-Mode Fiber

Lü

Zhang

et al. 2019

IEEE Photonics J.

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A simple and efficient manufacture method of helical long period fiber grating (HLPFG) in a single-mode fiber (SMF) is designed and verified through experiment. Different from the previous fabricating methods, the SMF is heated by a double-side CO 2 laser beam after being twisted. There are multiple transmission depletions caused by model coupling which could be observed when the period length is 500 μm. The sensing characteristics of the HLPFG have been investigated. Experimental results demonstrate axial strain sensitivities of 3.3 and 6.4 pm/με at the selected dips in the range of 0-450 με or temperature sensitivities of 35.3 and 49.5 pm/°C at the selected dips in the range of 20-70°C, respectively. Moreover, through theoretical analysis, it is found that the fabricated HLPFG can measure axial strain and temperature concurrently by monitoring the resonance wavelength shift. Therefore, the fabricated HLPFG has brilliant applications value in dual measurement.

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Optical fiber sensor based on helical Fibers: A review

et al. 2022

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Fabrication and characterization of helical long-period fiber gratings in single-mode fibers

Cited by 11 publications

References 20 publications

An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

Sensing Characterization of Helical Long Period Fiber Grating Fabricated by a Double-Side CO₂ Laser in Single-Mode Fiber

Optical fiber sensor based on helical Fibers: A review

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Fabrication and characterization of helical long-period fiber gratings in single-mode fibers

Cited by 11 publications

References 20 publications

An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

An Optical Fiber Twist Sensor With Temperature Compensation Mechanism Based on T-SMS Structure

Sensing Characterization of Helical Long Period Fiber Grating Fabricated by a Double-Side CO2 Laser in Single-Mode Fiber

Optical fiber sensor based on helical Fibers: A review

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Sensing Characterization of Helical Long Period Fiber Grating Fabricated by a Double-Side CO₂ Laser in Single-Mode Fiber