en فیبر نوری، حسگرهای فیبری و مخابرات نوری Optical Fiber, Fiber Sensors, and Optical Communications پژوهشي Research <span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">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. </span></span> CORDIC algorithm, Distributed sensor, Interferometry, Modulus, Optical fiber acoustic sensor, Polymer. 229 238 http://ijop.ir/browse.php?a_code=A-10-978-1&slc_lang=en&sid=1 Morteza Janfaza m.janfaza@saravan.ac.ir 10031947532846005145 10031947532846005145 Yes Department of Electrical Engineering, Faculty of Engineering, Higher Education Complex of Saravan, Saravan, I.R. Iran Hamed Moradi hamedahmadzadeh43@yahoo.com 10031947532846005146 10031947532846005146 No Faculty of Electrical Engineering, Sharif University of Technology, Tehran, I.R. Iran Arsalan Jalil jalilarsalan@yahoo.com 10031947532846005147 10031947532846005147 No Faculty of Electrical Engineering, Sharif University of Technology, Tehran, I.R. Iran