Temperature and chirp compensated fibre Bragg grating geophone for improved seismic detection
Document Type
Article
Publication Date
4-1-2025
Abstract
This study presents the development and performance evaluation of a temperature and chirp compensated fibre Bragg grating (FBG) geophone for improved seismic detection. The proposed FBG geophone utilized a rubber diaphragm to enhance vibration sensitivity. A differential FBG technique with two-point bonding was employed to eliminate chirping effects and achieve temperature compensation. The fabricated FBG geophone demonstrated a vibration sensitivity of 68.77 pm/g across the range of 1-54 Hz. Moreover, the proposed design exhibited a low cross-axis sensitivity of 3.68% and insignificant temperature sensitivity of 0.25 pm/degrees C. These findings significantly enhance the overall performance of the proposed FBG geophone for seismic detection.
Keywords
FBG geophone, FBG accelerometer, Temperature compensated, Chirp compensated
Divisions
PHYSICS
Funders
TotalEnergies EP Malaysia [Grant No: 015MD0-163],Universiti Teknologi PETRONAS (UTP),Institute of Smart & Sustainable Living (ISSL),Centre of Smart Infrastructure Modelling & Monitoring (SIMM)
Publication Title
Optics Communications
Volume
579
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS