Nonbinary LDPC-Coded Mode-Multiplexed Coherent Optical OFDM 1.28-Tbit/s 16-QAM Signal Transmission Over 2000 km of Few-Mode Fibers With Mode-Dependent Loss

We demonstrate the possibility of nonbinary LDPC-coded mode-multiplexed coherent optical OFDM 1.28-Tbit/s 16-QAM signal transmission over 2000 km of few-mode fiber (FMF) with mode-dependent loss (MDL) by using an advanced mode-coupling compensation scheme. The performance of proposed coded-modulation scheme is evaluated for different number of spatial modes. The simulation results indicate that the MDL is the predominant effect in the long-haul optical transmission based on FMFs. Different pilot-aided OFDM based compensation methods are studied, and it has been found that minimum mean-square estimation with linear interpolation method is the most robust against mode coupling and MDL. We also show that the nonbinary LDPC-coded modulation provides about 1 dB improvement over binary LDPC-coded modulation (16 QAM OFDM and MDL of 25 dB). Finally, we study the degradation of increasing the number of modes and investigate the proposed scheme for different MDL values in both fourand eight-mode fibers.

[1]  M. Arabaci,et al.  High-Rate Nonbinary Regular Quasi-Cyclic LDPC Codes for Optical Communications , 2009, Journal of Lightwave Technology.

[2]  Ting Wang,et al.  Multidimensional Hybrid Modulations for Ultrahigh-Speed Optical Transport , 2011, IEEE Photonics Journal.

[3]  Ivan B Djordjevic.  Energy-efficient spatial-domain-based hybrid multidimensional coded-modulations enabling multi-Tb/s optical transport. , 2011, Optics express.

[4]  Ivan B. Djordjevic,et al.  Advanced Optical Communication Systems and Networks , 2013 .

[5]  J. Kahn,et al.  Mode-dependent loss and gain: statistics and effect on mode-division multiplexing. , 2011, Optics express.

[6]  David J. C. MacKay,et al.  Low-density parity check codes over GF(q) , 1998, IEEE Communications Letters.

[7]  Kevin Barraclough,et al.  I and i , 2001, BMJ : British Medical Journal.

[8]  Ivan B. Djordjevic,et al.  Multi-Tb/s optical transmission based on polarization-multiplexed LDPC-coded multi-band OFDM , 2011, 2011 13th International Conference on Transparent Optical Networks.

[9]  Ivan B. Djordjevic,et al.  Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation , 2010, OPTO.

[10]  D. Mackay,et al.  Low density parity check codes over GF(q) , 1998, 1998 Information Theory Workshop (Cat. No.98EX131).

[11]  Ding Zou,et al.  LDPC-coded mode-multiplexed CO-OFDM over 1000 km of few-mode fiber , 2012, 2012 Conference on Lasers and Electro-Optics (CLEO).

[12]  William Shieh,et al.  OFDM for Optical Communications , 2009 .

[13]  Benyuan Zhu,et al.  Long distance transmission in few-mode fibers. , 2010, Optics express.

[14]  Ross Saunders,et al.  Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks. , 2010, Optics express.