匹配干涉型光纤水听器中的动态不连续性瑞利散射噪声研究

Yue, 戚悦 Qi; Fan, 尚凡 Shang; Lina, 马丽娜 Ma; Shuidong, 熊水东 Xiong

doi:10.3788/aos202242.2306005

光学学报

2022

DOI: 10.3788/aos202242.2306005

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匹配干涉型光纤水听器中的动态不连续性瑞利散射噪声研究

戚悦 Qi Yue¹,

尚凡 Shang Fan²,

马丽娜 Ma Lina³

et al.

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2024

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Cited by 2 publications

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Revolutionizing Underwater Sensor Performance: Tackling Rayleigh Scattering Challenges by Pseudo Random Noise

Hu,

Shang,

et al. 2024

Advanced Science

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Traditionally, Rayleigh scattering is thought to only impact fiber sensing system performance when the leading fiber is over 10 km long. However, this report illustrates theoretically and experimentally that Rayleigh scattering cannot be ignored in fiber optic interferometric sensor (FOIS) even with several hundred‐meter common leading fiber because of the interaction of Rayleigh backward scattering (RBS) and returning interference signal. Herein, a conceptual framework is developed to elucidate the interaction between RBS and FOIS interference, revealing that, beyond laser monochromacity, the self‐correction characteristic of laser pulses also influences coherent superposition. Building upon this novel insight, a phase modulation method based on pseudorandom noise (PRN) code is first proposed to address coherent RBS stacking on returning FOIS interferences while preserving high laser monochromacity. By modulating the interrogation pulses, a 21.3 dB suppression of background phase noise is achieved in FOIS with 3.3 km leading fiber. This study offers a holistic understanding of Rayleigh scattering in the leading fiber, encompassing experimental observations, theoretical modeling, physics analysis, and its resolution, thereby contributing to advancements in underwater sensing to broaden the understanding of the underwater environment.

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Revolutionizing Underwater Sensor Performance: Tackling Rayleigh Scattering Challenges by Pseudo Random Noise

Hu,

Shang,

et al. 2024

Advanced Science

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一种提高光纤水听器解调系统噪声传递系数稳定性的多相相位生成载波解调算法

Hou Qingkai,

Yao Qiong,

Chen Hu

et al. 2024

光学学报

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匹配干涉型光纤水听器中的动态不连续性瑞利散射噪声研究

Cited by 2 publications

References 0 publications

Revolutionizing Underwater Sensor Performance: Tackling Rayleigh Scattering Challenges by Pseudo Random Noise

Revolutionizing Underwater Sensor Performance: Tackling Rayleigh Scattering Challenges by Pseudo Random Noise

一种提高光纤水听器解调系统噪声传递系数稳定性的多相相位生成载波解调算法

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