Phase-shifted gratings fabricated with femtosecond laser by overlapped two types of fiber Bragg gratings

Sun, Xiaoyan; Zeng, Li; Du, Haifeng; Dong, Xinran; Chang, Zikun; Hu, Youwang; Duan, Ji’an

doi:10.1016/j.optlastec.2019.105969

Cited by 22 publications

(6 citation statements)

References 22 publications

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“…The process of creating FBGs involves introducing the core’s regularly varying refractive index throughout the length of optical fiber, which resonates at a wavelength commonly referred to as the Bragg wavelength. To put it simply, the FBG functions as an optical filter that reflects just a certain wavelength of light while transmitting all other wavelengths [ 149 , 150 , 151 ]. The advent of several optical fiber-based sensors has made great use of FBG ever since its creation in the late 1970s.…”

Section: Types Of Environmental Monitoring Optical Sensorsmentioning

confidence: 99%

Environmental Monitoring: A Comprehensive Review on Optical Waveguide and Fiber-Based Sensors

et al. 2022

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Globally, there is active development of photonic sensors incorporating multidisciplinary research. The ultimate objective is to develop small, low-cost, sensitive, selective, quick, durable, remote-controllable sensors that are resistant to electromagnetic interference. Different photonic sensor designs and advances in photonic frameworks have shown the possibility to realize these capabilities. In this review paper, the latest developments in the field of optical waveguide and fiber-based sensors which can serve for environmental monitoring are discussed. Several important topics such as toxic gas, water quality, indoor environment, and natural disaster monitoring are reviewed.

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Section: Types Of Environmental Monitoring Optical Sensorsmentioning

confidence: 99%

Environmental Monitoring: A Comprehensive Review on Optical Waveguide and Fiber-Based Sensors

et al. 2022

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“…In addition to the strain-assistant method, our research group proposed a tilt-assistant method that could also achieve the same result [ 64 ]. The schematic diagram is shown in Figure 14 b.…”

Section: Phase Shifted Fiber Bragg Grating Sensorsmentioning

confidence: 99%

Fabrication and Sensing Application of Phase Shifted Bragg Grating Sensors

Sun

Zeng

et al. 2022

Materials

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As a special kind of Bragg grating, phase-shifted fiber Bragg grating (PS-FBG) has attracted extensive attention because of its extremely narrow transmission window and excellent sensing performance. The main purpose of this manuscript is to discuss the PS-FBG with special sensing characteristics and explore the influence of different inscription technologies on the sensing characteristics of PS-FBG by comparing the existing inscription methods. The sensing characteristics, advantages and disadvantages of PS-FBG with different structures are analyzed.

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“…9 (d) presents a significant red shift when T increased, and a significant blue shift when T decreased. During the FBG heat treatment, both λB and Δn are affected by the material thermal expansion and the thermo-optic effect [21]. > REPLACE THIS LINE WITH YOUR MANUSCRIPT ID NUMBER (DOUBLE-CLICK HERE TO EDIT) <…”

Section: Fig 8 Schematic Diagram For Fbgs Heat Treatment Testmentioning

confidence: 99%

Direct Femtosecond Laser Inscription of High-Order Bragg Gratings in Fluoroaluminate Glass Fiber

She

Wang

et al. 2022

IEEE Photonics J.

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This letter reports the fabrication of fiber Bragg gratings (FBGs) within in-house fabricated fluoroaluminate (AlF3) glass fibers using femtosecond (fs) laser inscription at 800 nm. The grating strength of the FBGs was investigated for different pulse energies and different orders, and a 3 rd -order FBG with Bragg wavelength at 1557 nm was found to have the highest reflectivity of 99.5%. In addition, the reflectivity of the mid-IR grating peaks for different orders was also studied, and a 2 nd -order FBG with a reflectivity of 98.8% was obtained at 2864 nm. Finally, the temperature characteristics of a mid-IR FBG were studied between 30 °C and 150 °C, showing a linear wavelength dependence and an excellent stability for the refractive index modulation. Such highly reflectivity FBGs in AlF3 fiber have significant potential for applications in the development of compact all-fiber mid-IR fiber lasers.

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Phase-shifted gratings fabricated with femtosecond laser by overlapped two types of fiber Bragg gratings

Cited by 22 publications

References 22 publications

Environmental Monitoring: A Comprehensive Review on Optical Waveguide and Fiber-Based Sensors

Environmental Monitoring: A Comprehensive Review on Optical Waveguide and Fiber-Based Sensors

Fabrication and Sensing Application of Phase Shifted Bragg Grating Sensors

Direct Femtosecond Laser Inscription of High-Order Bragg Gratings in Fluoroaluminate Glass Fiber

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