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Zhigang Xin

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Proceedings Article | 21 December 2023 Paper

Influence of laser phase noise on photonics-aided terahertz wireless communication system

Zhigang Xin, Jiao Zhang, Min Zhu

Proceedings Volume 12966, 129660I (2023) https://doi.org/10.1117/12.3005414

KEYWORDS: Laser frequency, Semiconductor lasers, Wireless communications, Optical simulations, Digital signal processing, Spectral density, Optical transmission

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We studied the influence of frequency and phase noise of semiconductor laser on the performance of photonics assisted terahertz wave system. The laser spectrum is Lorentzian intrinsic shape when only Gaussian white noise exists. The phase noise of the laser increases with the increase of the Lorentzian spectral linewidth of the laser. When considering 1 f noise, the laser frequency will be superimposed with 1 f noise. The 1 f noise in the low-frequency band will make the reconstructed laser spectrum of the whole frequency noise tend to be non-Lorentzian shape, which has a serious impact on system performance. When the system is affected by the resonance frequency, the side lobes appearing on both sides of the main peak of the laser spectrum also have a certain impact on the system performance. We simulated dual-polarization (DP) 16-ary quadrature amplitude modulation (16QAM) signal transmission up to 60Gbaud on a 50km standard single mode fiber (SSMF) at 300GHz.

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