Simultaneously two‐parameter measurement using tilted fiber grating and long period fiber grating

Yu, Yi‐Lin; Hung, Hzu‐Hsuan; Liaw, Shien‐Kuei; Shih, Min‐Hsiung; Kishikawa, Hiroki; Goto, Nobuo

doi:10.1002/mop.30479

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…By utilizing different grating sensitivities at different positions, multiparameter sensing can be achieved. Compared to traditional measurement systems that combine different gratings [88][89][90], the sensor-based RFGA reduces complexity and cost and improves mechanical strength. The strong random scattering characteristic of RFGA is also able to solve the problem of traditional FBG being limited by broadband light source, which causes difficulty to achieve high-resolution monitoring.…”

Section: Random Weak Grating Array As a Sensitive Elementmentioning

confidence: 99%

Review of Random Fiber Lasers for Optical Fiber Sensors

Tian,

Zhang,

Huang

2023

Sensors

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A random fiber laser does not need a traditional resonant cavity and only uses the multiple scattering of disordered media to provide feedback to achieve laser output. Therefore, it has the advantages of a simple structure, narrow linewidth, and low noise and is particularly suitable for fiber optic sensors. This paper provides an introduction to the categories and corresponding principles of random fiber lasers. The research progress of random fiber lasers in the sensing field in recent years, including various aspects of random fiber lasers as low-noise light sources or sensitive elements for fiber sensing systems, is the main focus. Finally, the future development trend of random fiber lasers for optical fiber sensors is explored.

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Section: Random Weak Grating Array As a Sensitive Elementmentioning

confidence: 99%

Review of Random Fiber Lasers for Optical Fiber Sensors

Tian,

Zhang,

Huang

2023

Sensors

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“…The dual wavelength matrix method uses two FBGs with different temperatures or strain sensitivities. Both FBGs simultaneously sense the external temperature and strain, such as FBG and tilted fiber Bragg grating (TFBG) [19], FBG and long-period fiber grating (LPFG) [20], TFBG, and LPFG [21]. However, the length of the TFBG and LPFG is generally in the centimeter range, making it difficult to achieve a high-density array.…”

Section: Introductionmentioning

confidence: 99%

Strain and Temperature Sensing Based on Different Temperature Coefficients fs-FBG Arrays for Intelligent Buoyancy Materials

Tian,

Lou,

Zhang

et al. 2024

Sensors

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The temperature and strain fields monitoring during the preparation process of buoyancy materials, as well as the health status after molding, are important for mastering the mechanical properties of buoyancy materials and ensuring the safety of operators and equipment. This paper proposes a short and high-density femtosecond fiber Bragg grating (fs-FBG) array based on different temperature coefficients fibers. By optimizing the parameters of femtosecond laser point-by-point writing technology, high-performance fs-FBG arrays with millimeter level gating length and millimeter level spatial resolution were prepared on two types of fibers. These were successfully embedded in buoyancy materials to achieve in-situ online monitoring of the curing process and after molding. The experimental results show that the fs-FBG array sensor has good anti-chirp performance and achieves online monitoring of millimeter-level spatial resolution. Intelligent buoyancy materials can provide real-time feedback on the health status of equipment in harsh underwater environments. The system can achieve temperature monitoring with an accuracy of 0.56 °C and deformation monitoring with sub-millimeter accuracy; the error is in the order of micrometers, which is of great significance in the field of deep-sea exploration.

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“…Therefore, the RI measurement without considering the thermal effect may cause the analyte to be misjudged. In 2017, we proposed a complex sensor combined with an FBG and LFPG for RI and temperature detection [18].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of temperature and refractive index based on an SPR Silicon core fiber sensor with a fused silica grating design

Kishikawa

Liaw

et al. 2022

Opt Quant Electron

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This paper proposed a fiber sensor based on a Silicon core fiber incorporated with a fused silica grating design. The proposed structure is a nice sensitive in refractive index and temperature variation through theoretical calculation and finite element method simulation. The sensitivities of the refractive index in different polarization directions are 1838.7 and 1949.8 nm/RIU, respectively, within the index range from 1.28 to 1.38 RIU. The temperature range within 15 to 40 o C has the sensitivity up to 1.6 nm/ o C by using ethanol analyte. The proposed fiber sensor can provide a method or a solution for intelligent sensing systems.

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Simultaneously two‐parameter measurement using tilted fiber grating and long period fiber grating

Cited by 9 publications

References 11 publications

Review of Random Fiber Lasers for Optical Fiber Sensors

Review of Random Fiber Lasers for Optical Fiber Sensors

Strain and Temperature Sensing Based on Different Temperature Coefficients fs-FBG Arrays for Intelligent Buoyancy Materials

Simultaneous measurement of temperature and refractive index based on an SPR Silicon core fiber sensor with a fused silica grating design

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