AWG-based large dynamic range fiber Bragg grating interrogation system

Arrayed waveguide gratings (AWGs) are extensively employed in fiber Bragg grating (FBG) interrogation systems due to their compact size, lightweight nature, and excellent interrogation performance. The resolution and total measurement range of AWG-based FBG interrogation systems are constrained by t...

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Bibliographic Details
Published in:Optoelectronics letters 2024-03, Vol.20 (3), p.129-134
Main Authors: Li, Shufeng, Yuan, Pei, Li, Ke, Li, Ting, Zhu, Lianqing
Format: Article
Language:English
Subjects:
Bragg gratings
Dynamic range
Interrogation
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Temperature dependence
Waveguides
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Summary:Arrayed waveguide gratings (AWGs) are extensively employed in fiber Bragg grating (FBG) interrogation systems due to their compact size, lightweight nature, and excellent interrogation performance. The resolution and total measurement range of AWG-based FBG interrogation systems are constrained by the output properties of AWG. We proposed an AWG-based large dynamic range interrogation system. The temperature dependence of AWG is exploited to achieve continuous interrogation. The test results show that the interrogation system has a dynamic range of 28.67 nm, an interrogation accuracy better than 25 pm, and a wavelength resolution of 6 pm.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-024-3115-4