Miniature Two-Axis Accelerometer Based on Multicore Fiber for Pantograph-Catenary System

Yaokang Yu, Jitendra Narayan Dash, Jingxian Cui, Dinusha Serandi Gunawardena, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review


We report a miniature and robust two-axis accelerometer using a cantilever beam structure based on a multicore fiber (MCF) for pantograph-catenary system monitoring. Two cores of the MCF were inscribed with fiber Bragg gratings (FBGs) using a femtosecond laser-based point-by-point technique without the need to remove the protective coating of the fiber. The parameters of the sensor have been optimized using finite-element-based simulations and its response to acceleration was investigated at a frequency of 40 Hz at different orientations. The packaged sensor has a weight of 5.2 g with maximum acceleration sensitivities of 18-19 pm/g along the $x$ - and $y$ -axes, respectively, for applied acceleration up to 10 g. Furthermore, the fabricated sensor exhibits a sensitivity of 14 pm/g along with a linear response for higher acceleration from 10 to 25 g, thereby demonstrating its robustness for practical applications that require small and lightweight accelerometers.

Original languageEnglish
Article number7005208
JournalIEEE Transactions on Instrumentation and Measurement
Publication statusPublished - 2023


  • Accelerometer
  • femtosecond laser
  • multicore fiber (MCF)
  • pantograph

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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