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Open AccessFeature PaperArticle

Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone

1
Key Laboratory of Opto-Electronic Information Technology (MoE), School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2
School of Engineering, University of Warwick, Coventry CV4 7AL, UK
3
Optical Networks Group, University College London, London WC1E 7JE, UK
4
Department of Optical Engineering, Harbin Institute of Technology, Harbin 150001, China
5
NETLAB, RISE Research Institutes of Sweden, SE-16440 Stockholm, Sweden
6
Optics and Photonics Group, KTH Royal Institute of Technology, SE-16440 Stockholm, Sweden
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(21), 4717; https://doi.org/10.3390/app9214717
Received: 26 September 2019 / Revised: 31 October 2019 / Accepted: 3 November 2019 / Published: 5 November 2019
Long-haul optical fiber communication employing digital signal processing (DSP)-based dispersion compensation can be distorted by the phenomenon of equalization-enhanced phase noise (EEPN), due to the reciprocities between the dispersion compensation unit and the local oscillator (LO) laser phase noise (LPN). The impact of EEPN scales increases with the increase of the fiber dispersion, laser linewidths, symbol rates, signal bandwidths, and the order of modulation formats. In this work, the phase noise cancellation (PNC) employing a radio frequency (RF) pilot tone in coherent optical transmission systems has been investigated. A 28-Gsym/s QPSK optical transmission system with a significant EEPN has been implemented, where the carrier phase recovery (CPR) was realized using the one-tap normalized least-mean-square (NLMS) estimation and the differential phase detection (DPD), respectively. It is shown that the RF pilot tone can entirely eliminate the LPN and efficiently suppress the EEPN when it is applied prior to the CPR. View Full-Text
Keywords: coherent optical fiber communication; laser phase noise (LPN); carrier phase recovery (CPR); phase noise cancellation (PNC); equalization enhanced phase noise (EEPN); radio frequency (RF) pilot tone coherent optical fiber communication; laser phase noise (LPN); carrier phase recovery (CPR); phase noise cancellation (PNC); equalization enhanced phase noise (EEPN); radio frequency (RF) pilot tone
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MDPI and ACS Style

Xu, T.; Jin, C.; Zhang, S.; Jacobsen, G.; Popov, S.; Leeson, M.; Liu, T. Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone. Appl. Sci. 2019, 9, 4717.

AMA Style

Xu T, Jin C, Zhang S, Jacobsen G, Popov S, Leeson M, Liu T. Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone. Applied Sciences. 2019; 9(21):4717.

Chicago/Turabian Style

Xu, Tianhua; Jin, Cenqin; Zhang, Shuqing; Jacobsen, Gunnar; Popov, Sergei; Leeson, Mark; Liu, Tiegen. 2019. "Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone" Appl. Sci. 9, no. 21: 4717.

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