Error Analysis and Suppression of Rectangular-Pulse Binary Phase Modulation Technology in an Interferometric Fiber-Optic Sensor.

Qian Cheng, Hong Ding, Xianglei Pan, Nan Chen, Wenxu Sun, Zhongjie Ren, Ke Cui

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Article in Sensors (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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Authors and funding

7 authors.

Qian ChengSchool of Physical Science and Technology, Nantong University, Nantong 226019, China.

Hong DingSchool of Physical Science and Technology, Nantong University, Nantong 226019, China.

Xianglei PanSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Nan ChenSchool of Physical Science and Technology, Nantong University, Nantong 226019, China.

Wenxu SunSchool of Physical Science and Technology, Nantong University, Nantong 226019, China.

Zhongjie RenSchool of Physical Science and Technology, Nantong University, Nantong 226019, China.ORCID 0000-0002-2003-6065

Ke CuiSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Funding

National Natural Science Foundation of China 12304250National Natural Science Foundation of China 62305177Natural Science Foundation of Jiangsu Province BK20220600

6 · The paper itself

Abstract

In the field of interferometric fiber-optic sensing, the phase-shifting technique is well known as a highly efficient method for retrieving the phase signal from the interference light intensity. The rectangular-pulse binary phase modulation (RPBPM) method is a typical phase-shifting method with the advantages of high efficiency, low complexity, and easy array multiplexing. Exploring the impact of the parameters on the performance is of great significance for guiding its application in practical systems. In this study, the influence of the sampling interval and modulation depth deviation involved in the method is analyzed in detail. Through a comparative simulation analysis with the traditional heterodyne and phase-generated carrier methods, the superiority of the RPBPM method is effectively validated. Meanwhile, an improved method based on the ellipse fitting of the Lissajous figure is proposed to compensate for the error and improve the signal-to-noise-and-distortion ratio (SINAD) from 26.3 dB to 37.1 dB in a specific experiment. Finally, the experimental results guided by the above method show excellent performance in a practical vibration system.

Indexed as

fiber-optic sensorinterferometerphase demodulationphase modulation

Identifiers

PMID40808003

DOI10.3390/s25154839

PMCPMC12349378

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