Enhanced high temperature properties of overexposed FBG fabricated by femtosecond laser

Dong, Xinran; Zeng, Li; Chu, Dongkai; Sun, Xiaoyan; Duan, Ji’an

doi:10.1016/j.measurement.2022.111118

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…and stability, it falls short of the requirements of high-precision sensing because of its low sensitivity. To improve the measurement sensitivity of the FBG sensors, microfabrication methods such as chemical etching [16], arc discharge [17], mechanical polishing [18], and femtosecond laser modification [19] have been used to treat gratings. Although these methods may improve the measurement sensitivity of the FBG sensor, they reduce its mechanical strength and service life.…”

Section: Introductionmentioning

confidence: 99%

Multiparameter measurement depending on the cavity-length differentiation characteristics of a microfiber Fabry–Perot interferometer

Liu,

Ran,

Liu

et al. 2024

Meas. Sci. Technol.

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To solve the cross-sensitivity problem affecting optical fiber sensors and realize multiparameter measurement, a microfiber Fabry–Perot interferometer (MFPI) is proposed and experimentally demonstrated. Simultaneous measurement of two distinct physical parameter (temperature and strain) is realized by monitoring wavelength and reflectivity of MFPI. In the temperature field range of 22-36 ℃, the maximum temperature sensitivity can reach 12 pm/℃. The maximum strain sensitivity is up to 0.8 pm/με in the strain range of 0-800 με. In the simultaneous measurement experiments, the relative errors of temperature and strain were 4.0 % and 0.8%, respectively. Furthermore, the sensing element used in this method was just a single fiber grating sensor without any coating layer, which demonstrated the significant advantage of the proposed method in reducing the complexity and cost of multiparameter measurement.

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Section: Introductionmentioning

confidence: 99%

Multiparameter measurement depending on the cavity-length differentiation characteristics of a microfiber Fabry–Perot interferometer

Liu,

Ran,

Liu

et al. 2024

Meas. Sci. Technol.

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Multilayer metal-coated fiber Bragg grating for high-temperature sensing

Wang,

Sun,

et al. 2024

Measurement

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Femtosecond laser-induced Bragg gratings in silica-based fibers for harsh environment sensing

Mihailov

2023

APL Photonics

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The technique of femtosecond laser-induced inscription of fiber Bragg gratings creates a structure in the optical fiber that can be used effectively as a sensor especially when deployed in harsh environments. Depending on the optical fiber chosen and the inscription parameters that are used, devices can be made that are suitable for sensing applications involving high temperature, pressure, ionizing radiation, and strain. Such devices are appropriate for aerospace or energy production applications where there is a need for components, instrumentation, and controls that can function in harsh environments. This paper will present a review of some of the more recent developments in this field.

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Enhanced high temperature properties of overexposed FBG fabricated by femtosecond laser

Cited by 6 publications

References 27 publications

Multiparameter measurement depending on the cavity-length differentiation characteristics of a microfiber Fabry–Perot interferometer

Multiparameter measurement depending on the cavity-length differentiation characteristics of a microfiber Fabry–Perot interferometer

Multilayer metal-coated fiber Bragg grating for high-temperature sensing

Femtosecond laser-induced Bragg gratings in silica-based fibers for harsh environment sensing

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