Performance analysis of fiber Bragg grating sensor interrogators based on arrayed waveguide gratings

Yuan, Peng; Weng, Siming; Ji, Songkun; Zhang, Dongliang; Zhu, Lianqing

doi:10.1117/1.oe.60.6.066101

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…A wide-spectrum light source, circulator, FBG sensors, AWG, photodetector (PD) array, and readout circuit make up the AWG-based FBG interrogation system [ 21 ]. The connection is shown in Figure 1 .…”

Section: Design and Simulationmentioning

confidence: 99%

PLC-Based Arrayed Waveguide Grating Design for Fiber Bragg Grating Interrogation System

Yuan

et al. 2022

Nanomaterials

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A fiber Bragg grating (FBG) interrogator is a scientific instrument that converts the wavelength change of FBG sensors into readable electrical signals. To achieve miniaturization and integration of FBG interrogator, we designed and fabricated a 36-channel array waveguide grating (AWG) on silica-based planar lightwave circuits (PLC) as a key device in a built FBG interrogation system. It is used to achieve continuous demodulation in C-band, while maintaining high resolution. This AWG has a 1.6 nm channel spacing, 3-dB bandwidth of 1.76 nm, non-adjacent channel crosstalk of −29.76 dB, and insertion loss of 3.46 dB. The dynamic range of the FBG interrogation system we built was tested to be 1522.4–1578.4 nm, with an interrogation resolution of 1 pm and accuracy of less than 1 pm in the dynamic range of 1523.16–1523.2 nm. The test results show that the FBG interrogation technology, based on AWG, can realize FBG wavelengths accurately demodulated, which has high application value in aerospace, deep sea exploration, and environmental monitoring, as well as other fields.

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Section: Design and Simulationmentioning

confidence: 99%

PLC-Based Arrayed Waveguide Grating Design for Fiber Bragg Grating Interrogation System

Yuan

et al. 2022

Nanomaterials

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“…According to the employed architectures, the structures of on-chip FBG interrogators can be mainly categorized into four types, including the Mach-Zehnder interferometer (MZI) [19][20][21][22], micro-ring resonator (MRR) [23][24][25][26], arrayed waveguide grating (AWG) [27][28][29][30][31][32][33][34][35], and tunable semiconductor laser [36]. Among them, the wavelength accuracy, wavelength range, size of interrogator, and number of FBG sensors are difficult to be satisfied simultaneously.…”

Section: Introductionmentioning

confidence: 99%

On-Chip Sub-Picometer Continuous Wavelength Fiber-Bragg-Grating Interrogator

Zhuang,

Zou,

Zhang

et al. 2024

Photonic Sens

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Miniaturized fiber-Bragg-grating (FBG) interrogators are of interest for applications in the areas where weight and size controlling is important, e.g., airplanes and aerospace or in-situ monitoring. An ultra-compact high-precision on-chip interrogator is proposed based on a tailored arrayed waveguide grating (AWG) on a silicon-on-insulator (SOI) platform. The on-chip interrogator enables continuous wavelength interrogation from 1 544 nm to 1 568 nm with the wavelength accuracy of less than 1 pm [the root-mean-square error (RMSE) is 0.73 pm] over the whole wavelength range. The chip loss is less than 5 dB. The 1 × 16 AWG is optimized to achieve a large bandwidth and a low noise level at each channel, and the FBG reflection peaks can be detected by multiple output channels of the AWG. The fabricated AWG is utilized to interrogate FBG sensors through the center of gravity (CoG) algorithm. The validation of an on-chip FBG interrogator that works with sub-picometer wavelength accuracy in a broad wavelength range shows large potential for applications in miniaturized fiber optic sensing systems.

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“…SOI is a state-of-the-art material for photonic incorporated chip materials in the era of nanotechnology. Compared with the current material frameworks, such as indium phosphide (InP) [16], SiO 2 [17,18], and polymers [19] which can be utilized to manufacture AWG, the SOI-based platform enables low power consumption, small size, and high computing speed AWG [20][21][22][23]. Its fabrication process is compatible with the complementary metal oxide semiconductor, which can simplify the process and lessen the expense.…”

Section: Introductionmentioning

confidence: 99%

SOI-based 12 × 12 arrayed waveguide grating for fiber Bragg grating interrogation system

Li,

Yuan,

et al. 2023

Meas. Sci. Technol.

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Fiber Bragg grating (FBG) interrogator is a scientific instrument that can indirectly monitor physical quantities such as temperature and pressure by detecting the center wavelength of FBG. The arrayed waveguide grating (AWG), one of the fundamental parts of the FBG interrogation system, is essential for driving the downsizing of the system and high-speed rate. In this paper, a 12-channel silicon on insulator (SOI) based AWG with an average 3-dB bandwidth of 2.23 nm, insertion loss of less than 5 dB, and crosstalk of -16.64 dB is designed and fabricated for a photonic integrated FBG interrogation system. The wavelength resolution of the FBG interrogation system of this AWG is 8 pm, and the wavelength accuracy measured in the dynamic range of 0.8 nm is 10.59 pm. This AWG can be well used in FBG interrogation systems.

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Performance analysis of fiber Bragg grating sensor interrogators based on arrayed waveguide gratings

Cited by 10 publications

References 20 publications

PLC-Based Arrayed Waveguide Grating Design for Fiber Bragg Grating Interrogation System

PLC-Based Arrayed Waveguide Grating Design for Fiber Bragg Grating Interrogation System

On-Chip Sub-Picometer Continuous Wavelength Fiber-Bragg-Grating Interrogator

SOI-based 12 × 12 arrayed waveguide grating for fiber Bragg grating interrogation system

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