Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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All-optical Signal Processing of Fiber Impairments in Dual-Polarization 112 Gbit/s m-ary QAM Coherent Transmission

  • Asif, Rameez (Department of Telecommunication Engineering, University of Engineering and Technology (UET)) ;
  • Islam, Muhammad Khawar (Department of Telecommunication Engineering, University of Engineering and Technology (UET)) ;
  • Zafrullah, Muhammad (Department of Electronics Engineering, University of Engineering and Technology (UET))
  • Received : 2012.08.23
  • Accepted : 2012.12.21
  • Published : 2013.02.25
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Abstract

We have numerically implemented a receiver side all-optical signal processing method, i.e. optical backward propagation (OBP), by dispersion compensating fiber (DCF) and non-linear compensator (NLC) devised by effective negative Kerr non-linear coefficient using two highly non-linear fibers (HNLFs). The method is implemented for the post-processing of fiber transmission impairments, i.e. chromatic dispersion (CD) and non-linearities (NL). The OBP module is evaluated for dual-polarization (DP) m-ary (m=4,16,32,64,256) quadrature amplitude modulation (QAM) in 112 Gbit/s coherent transmission over 1200 km standard single mode fiber (SMF). We have also investigated an intensity limited optical backward propagation module (IL-OBP) by using a self-phase modulation-based optical limiter with an appropriate pre-chirping to compensate for the intensity fluctuations in the transmission link. Our results show that in highly non-linear sensitive 256QAM transmission, we have observed a 66% increase in the transmission distance by implementing IL-OBP as compared to conventional OBP.

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References

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