Multipoint Monitoring of Instantaneous Amplitude, Frequency, Phase and Sequence of Vibrations Using Concatenated Modal Interferometers

TL;DR

This paper presents a novel multipoint sensing system using concatenated modal interferometers based on photonic crystal fibers to detect and analyze instantaneous vibration parameters at multiple locations.

Contribution

It introduces a compact, integrated fiber-optic sensor array capable of independently measuring vibration amplitude, frequency, phase, and sequence at multiple points.

Findings

Successfully demonstrated multipoint vibration monitoring

Achieved independent operation of each sensor probe

Potential applications in industrial, infrastructural, and medical fields

Abstract

Concatenated modal interferometers based multipoint sensing system for detection of instantaneous amplitude, frequency, and phase of mechanical vibrations is proposed and demonstrated. The sensor probes are fabricated using identical photonic crystal fiber (PCF) sections and integrated along a single fiber channel to act as a compact and efficient sensing system. Individual probes operate independently producing a resultant signal that is a superposition of each interferometer response signal. By analyzing the resultant signals, information about the measurand field at each location is realized. Such a sensing system would find wide applications at industrial, infrastructural, and medical fronts for monitoring various unsteady physical phenomena.