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High-Fidelity Long-Haul Microwave Photonic Links with Composite OPLLs and Multi-Core Fiber for Secure Command and Control Systems in Contested Environments

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Publicado en:Photonics vol. 12, no. 9 (2025), p. 893-906
Autor principal: Bai Yuanshuo
Otros Autores: Zhang Zhaochen, Xie Weilin, Yang, Li, Teng, Tian, Yuan Dachuan, Shen Haokai
Publicado:
MDPI AG
Materias:
Wireless communications
Receivers & amplifiers
Propagation
Microwave radiation
Microwave photonics
Intermodulation distortion
Control systems
Phase locked loops
Command and control systems
Phase noise
Bandwidths
Noise reduction
Decision making
Signal processing
Nodes
Closed loops
Noise levels
Transmitters
Systems stability
Array processors
Phase demodulation
Acceso en línea:Citation/Abstract
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Resumen:Secure communication for critical command nodes has emerged as a pivotal challenge in modern warfare, in particular considering the vulnerability of these nodes to electronic reconnaissance. To cope with the severe interference, this paper proposes a robust solution for long-distance secure command and control system leveraging phase-modulated microwave photonic links. Studies that analyze the impairing nonlinear distortions and phase noise stemming from different sources in optical phase demodulation during long-haul transmission has been carried out, unveiling their impairment in coherent transmission systems. To overcome these limitations, a linearized phase demodulation and noise suppression technique based on composite optical phase-locked loop and multi-core fiber is proposed and experimentally validated. Experimental results demonstrate a long-haul transmission over 100 km with an 81 dB suppression for third-order intermodulation distortion and a 27 dB improvement in noise floor at 5 MHz under closed-loop condition, verifying a significant enhancement in the fidelity in long-distance transmission. This method ensures a highly reliable secure communication for command and control systems in contested electromagnetic environments.
ISSN:2304-6732
DOI:10.3390/photonics12090893
Fuente:Advanced Technologies & Aerospace Database