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Optical fiber technology v.39, 2017년, pp.5 - 11   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Nonlinearity-tolerant OSNR estimation method based on correlation function and statistical moments

Wang, Zihan (State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China ) ; Yang, Aiying (School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China ) ; Guo, Peng (School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China ) ; Lu, Yueming (Key Laboratory of Trustworthy Distributed Computing and Service, Ministry of Education, School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing 100876, China ) ; Qiao, Yaojun (State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China ) ;
  • 초록  

    Abstract We propose a fiber nonlinearity-tolerant optical signal-to-noise ratio (OSNR) estimation method for high speed long haul coherent optical fiber transmission system. The correlation function of the amplitude noise and a calibration factor ξ are utilized to correct nonlinearity-induced distortions for the first time when the statistical moments-based method (SMB method) is applied. ξ depends on not only transmission distances but also launch powers. Besides, we put forward a fitting formula for optimal ξ and OSNR estimation results still keep valid regardless of transmission distances and launch powers. Compared with current existing OSNR estimation methods, the proposed method functions well in highly nonlinear systems and is demonstrated to be feasible and more accurate. OSNR estimation errors are below 0.94dB after calibration over a wide OSNR range from 10dB to 28dB in a 112-Gb/s polarization-multiplexed quadrature phase shift keying (PM-QPSK) system when the launch power is up to 8dBm and the transmission distance is as long as 2000km. Highlights A new OSNR monitoring method is proposed in presence of strong fiber nonlinearities. It is applied when distance is up to 2000km and launch power is up to 8dBm. The correlation function and a calibration factor ξ are combined with statistical moments-based method. It is easy to be implemented with the formula for the calibration factor ξ . The method achieves monitoring error less than 0.94dB in the OSNR range of 10–28dB.


  • 주제어

    Optical fiber nonlinearities .   Optical signal-to-noise ratio .   Correlation function .   Coherent optical transmission system.  

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