Multi-parameter measurement of a multi-point high-frequency vibration signal in an OFDR system-Reference-Cited by-同舟云学术

Multi-parameter measurement of a multi-point high-frequency vibration signal in an OFDR system

Published:2022-06-24 Issue:19 Volume:61 Page:5675
ISSN:1559-128X
Container-title:Applied Optics
language:en
Short-container-title:Appl. Opt.

Author:

Song Muping¹,Chen Ge¹,Cui Enxue¹,Yuxin Zhang¹

Affiliation:

1. Zhejiang University

Abstract

The phase cross-correlation function of an optical frequency domain reflectometry (OFDR) system is proposed to detect a multi-point vibration event, which is verified in detail by theoretical simulation and experiment. An OFDR system based on a non-tunable laser source with digital sweep frequency is developed. It is verified experimentally that the location and frequency resolution of multi-point high-frequency vibration can be detected by analyzing the phase cross-correlation function of the sensing signal. High-frequency signals of 50 kHz and 20 kHz are located and separated on the 8 km optical fiber. The frequency resolution is 1.26 kHz, and the minimum spatial error is 11.5 m.

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering

Reference21 articles.

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5. Phase-detection distributed fiber-optic vibration sensor without fading-noise based on time-gated digital OFDR