Highly stable FBG wavelength demodulation system based on F-P etalon with temperature control module

Chao, 李超 Li; Yongjie, 王永杰 Wang; Fang, 李芳 Li

doi:10.3788/irla201746.0122002

Cited by 4 publications

(1 citation statement)

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“…The FBG interrogator is a device that analyzes the data of the FBG by monitoring the central wavelength change. Several approaches for FBG interrogation have been reported in the literature, such as the scanning Fabry-Pérot (FP) cavity [8,9], tunable lasers [10,11], and volume phase grating-based spectrometers [12,13]. However, most traditional interrogators usually suffer from the high price and bulky volume, which limits their applications in some emerging fields, such as unmanned aerial vehicle (UAV) monitoring, lithium-ion battery status monitoring [14], and in-situ three-dimensional (3D) shape sensing [15][16][17][18].…”

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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