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Proceedings Paper

A method for complex spectrum analysis of modulated optical signal
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Paper Abstract

We present a method for complex spectrum analysis of periodic optical signal with multi-level modulation format. The information of the complex spectrum can be extracted with ultra-low sampling rate in the proposed method, and the temporal information reconstructed by inverse Fourier transform can be used to monitor the performance of the optical signal. Besides, the proposed method is transparent to symbol rate and modulation format. The spectral amplitudes and phases are measured accurately in the simulation based on the proposed method for a 28 GBaud Quadrature-Phase-ShiftKeying (QPSK) signal with a 400-bit pattern and a 28 GBaud 16-Quadrature-Amplitude-Modulation(16QAM) signal with a 560-bit pattern. Moreover, we analyze the performance of the reconstructed signal under different linewidth and optical signal-to-noise ratio (OSNR) by simulation. The Q-factor of the reconstructed 28-GBaud QPSK signal reduces when the linewidth of laser increases and the OSNR of signal decreases.

Paper Details

Date Published: 12 March 2020
PDF: 7 pages
Proc. SPIE 11435, 2019 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 114350B (12 March 2020); doi: 10.1117/12.2543786
Show Author Affiliations
Lingwei Zhuang, Beijing Univ. of Posts and Telecommunications (China)
Yaojun Qiao, Beijing Univ. of Posts and Telecommunications (China)
Aiying Yang, Beijing Institute of Technology (China)
Peng Guo, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 11435:
2019 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing
Jian Chen; Yi Dong; Fabien Bretenaker, Editor(s)

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