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Volume 17, Issue 2 (Summer-Fall 2023)
IJOP 2023, 17(2): 229-238 |
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Janfaza M, Moradi H, Jalil A. Increasing the Signal-to-Noise Ratio in Underwater Distributed Optical Fiber Acoustic Sensor. IJOP 2023; 17 (2) :229-238
URL: http://ijop.ir/article-1-562-en.html
URL: http://ijop.ir/article-1-562-en.html
1- Department of Electrical Engineering, Faculty of Engineering, Higher Education Complex of Saravan, Saravan, I.R. Iran
2- Faculty of Electrical Engineering, Sharif University of Technology, Tehran, I.R. Iran
2- Faculty of Electrical Engineering, Sharif University of Technology, Tehran, I.R. Iran
Abstract: (830 Views)
In this study, we present the findings derived from our simulation and experimental investigation of a distributed optical fiber acoustic sensor. The proposed sensor operates by utilizing the self-interference of Rayleigh backscattering. When the optical pulse propagates through the optical fiber, the phase of the Rayleigh backscattered light changes at the location where the acoustic signal is present. This phase change is then amplified through the self-interference of two Rayleigh backscattered beams in the Michelson interferometer scheme. This study aims to present the Phase Generated Carrier (PGC) demodulation method along with the arctangent function (ATAN) and the Coordinate Rotation Digital Computer (CORDIC) algorithm. This method offers a simple and efficient algorithm for computing hyperbolic and trigonometric functions. The system allows for the detection of acoustic waves caused by sinusoidal disturbances with a spatial resolution of approximately 20 m.
Keywords: CORDIC algorithm, Distributed sensor, Interferometry, Modulus, Optical fiber acoustic sensor, Polymer.
Type of Study: Research |
Subject:
Optical Fiber, Fiber Sensors, and Optical Communications
Received: 2024/06/7 | Revised: 2024/10/12 | Accepted: 2024/10/2 | Published: 2024/10/4
Received: 2024/06/7 | Revised: 2024/10/12 | Accepted: 2024/10/2 | Published: 2024/10/4
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