All-optical Signal Processing of Fiber Impairments in Dual-Polarization 112 Gbit/s m-ary QAM Coherent Transmission

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.

Hybrid opto-digital signal processing in 112 Gbit/s DP-16QAM and DP-QDB transmission for long-haul large- $$\hbox {A}_\mathrm{eff}$$ A eff pure-silica-core fiber links

“…These physical parameters of fiber are optimized in such a way to obtain the best transmission performance. Also, the product of effective length and nonlinear coefficient is adjusted so that the nonlinear phase shift accumulated over fiber span can be compensated [38].…”

Advanced and flexible multi-carrier receiver architecture for high-count multi-core fiber based space division multiplexed applications

“…In recent years, numerous experiments have demonstrated the increment in spectral efficiency of fiber networks6789. These include the use of orbital angular momentum (OAM)1011, multi-mode based multiple-input multiple-output transmission (MIMO)1213 or either by implementing advanced modulation formats1415, such as m-ary quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM)161718. The major limitation, of OAM and multi-mode systems, is reduced transmission distance due to intra-core XT, mode coupling and mode gain equalization that is a major issue for multimode EDFA.…”

Dynamic Load-Balancing Algorithm Incorporating Flow Distributions and Service Levels for an AOPS Node

“…However, it is ineffective to strike the load balance using just hardware with the average optical flow at each wavelength for each port in such works. Meanwhile, the key components such as tunable wavelength converters are still costly or immature for practical deployment [18][19][20][21].…”