Video Experimental Relacionado

Updated: Feb 15, 2026

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Published on: March 8, 2020

Demodulación de alta precisión de FBG basada en un interferómetro de Michelson sintonizable con FBGs paralelos

Tingfeng Li, Shuo Wang, Fengyi Chen

|February 13, 2026

Abstract:

A high-precision signal demodulation scheme for fiber Bragg grating (FBG) is presented. The scheme utilizes a piezoelectric transducer (PZT) tuned co-located, multi-wavelength tunable FBGs (CMWT-FBGs) in one arm of the Michelson interferometer (MI), which adjusts its central-wavelength range to fully cover the wavelength shifts of the sensing FBG. The algorithm module utilizes a Savitzky-Golay (S-G) fitting algorithm to precisely locate the envelope peak of the interference signal, thereby accurately reconstructing the variations of the sensing FBG's central wavelength. Experimental results demonstrate that the modulation-demodulation scheme achieves a temperature accuracy of 1.33×10^-6°C and a strain accuracy of 1.04×10^-5με, respectively. These results show that the CMWT-FBGs-MI system offers a competitive advantage in high-speed and high-precision signal measurement, providing experimental and theoretical support for advancements in related fields.

Palabras clave:

red de Bragg de fibra demodulación interferómetro de Michelson sensor óptico alta precisión temperatura deformación

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