Femtosecond laser inscribed chirped fiber Bragg gratings

Pan, Xuepeng; Guo, Qi; Wu, Yingliang; Liu, Shan-Ren; Wang, Bo; Yu, Yong‐Sen; Sun, Hong–Bo

doi:10.1364/ol.422576

Cited by 21 publications

(2 citation statements)

References 32 publications

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“…In particular, strain measurement is an extensively used fiber optic sensing technology because of its ability to perform medical monitoring and civil engineering. Recently, Mach-Zehnder interferometers [19,20] (MZIs), long-period gratings [21] (LPGs), and particularly fiber Bragg gratings [22,23] (FBGs), have garnered attention in the field of strain-sensing technology; however, none of them exhibit low temperature sensitivity, which increases the cross-sensitivity between temperature and strain. Consequently, temperature compensation devices inevitably increase the cost and complicate the overall system.…”

Section: Introductionmentioning

confidence: 99%

Ultra-High Sensitivity and Temperature-Insensitive Optical Fiber Strain Sensor Based on Dual Air Cavities

Liu

et al. 2023

Materials

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This study proposed an all-fiber Fabry–Perot interferometer (FPI) strain sensor with two miniature bubble cavities. The device was fabricated by writing two axial, mutually close short-line structures via femtosecond laser pulse illumination to induce a refractive index modified area in the core of a single-mode fiber (SMF). Subsequently, the gap between the two short lines was discharged with a fusion splicer, resulting in the formation of two adjacent bubbles simultaneously in a standard SMF. When measured directly, the strain sensitivity of dual air cavities is 2.4 pm/με, the same as that of a single bubble. The measurement range for a single bubble is 802.14 µε, while the measurement range for a double bubble is 1734.15 µε. Analysis of the envelope shows that the device possesses a strain sensitivity of up to 32.3 pm/με, which is 13.5 times higher than that of a single air cavity. Moreover, with a maximum temperature sensitivity of only 0.91 pm/°C, the temperature cross sensitivity could be neglected. As the device is based on the internal structure inside the optical fiber, its robustness could be guarantee. The device is simple to prepare, highly sensitive, and has wide application prospects in the field of strain measurement.

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Section: Introductionmentioning

confidence: 99%

Ultra-High Sensitivity and Temperature-Insensitive Optical Fiber Strain Sensor Based on Dual Air Cavities

Liu

et al. 2023

Materials

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“…A common requirement across these systems is the introduction of linear dispersion because high-order dispersions can be detrimental in many situations, potentially compromising the performance of the system. The commonly used dispersive elements include dispersive fiber, 31 prism, 32 chirped fiber grating, 33,34 diffraction grating, 23,25 and so on. Compared to other methods, gratings have inherent advantages due to their relatively simple structure, high power, ease of adjustment, straightforward control of parameter variations, and strong dispersion capabilities.…”

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confidence: 99%

Linear dispersion (GDD) design using grating group

Wang,

Li,

Huang

et al. 2024

Applied Physics Letters

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Precise control of dispersion output holds paramount significance across domains such as optical fiber communication, time stretching, and spectral interferometric ranging. In comparison to other dispersion elements, like prisms, gratings are widely applied in the field of dispersion control due to their advantages of broad spectral range, tunability, and high resolution. Moreover, linear dispersion is the most desired characteristic by designers in most cases. Here, we develop a dispersion model for grating groups to determine the optimal structural parameters for achieving linear dispersion in high-order grating arrays. Based on our model, we provide corresponding parameter selection methods that allow for quantitative design of the size and slope of output dispersion by adjusting input parameters such as angle, distance, and parallelism. Additionally, we experimentally establish a dispersion interferometry structure based on the grating ensemble that validates our proposed approach's capability for linear dispersion output (linearity better than 0.9998). We believe that our approach is universally significant and contributes to enhancing the performance of dispersion interferometric measurement systems, chirp amplification systems, and other related systems.

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High flexibility FBG inscribing by point-by-point method via femtosecond laser: Technology, progress, and challenges

Zhang,

Zhao,

et al. 2024

Materials Today Communications

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Femtosecond laser inscribed chirped fiber Bragg gratings

Cited by 21 publications

References 32 publications

Ultra-High Sensitivity and Temperature-Insensitive Optical Fiber Strain Sensor Based on Dual Air Cavities

Ultra-High Sensitivity and Temperature-Insensitive Optical Fiber Strain Sensor Based on Dual Air Cavities

Linear dispersion (GDD) design using grating group

High flexibility FBG inscribing by point-by-point method via femtosecond laser: Technology, progress, and challenges

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