Higher-Order Modulation Formats – Concepts and Enabling Devices

The chapter gives a general introduction to higher-order modulation (HOM) formats and reviews the current status of concepts of coherent transceivers applied in optical fiber communications. The chapter presents an overview on the major enablers of HOM formats in optical transmission: forward error correction, digital signal processing, data converter, DP-IQ modulator, receiver frontend and application-specific integrated circuit (ASIC) technology. Based on the examples of current and future 400 Gbit/s and 1 Tbit/s transceivers the chapter illustrates feasible transmission capacities and transmission reach with HOM formats based on EDFA repeated C-band transmission over dispersion uncompensated standard single mode fiber.

[1]  Gottfried Ungerboeck,et al.  Channel coding with multilevel/phase signals , 1982, IEEE Trans. Inf. Theory.

[2]  F. Buchali,et al.  Performance and advantages of 100 Gb/s QPSK/8QAM hybrid modulation formats , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[3]  Munehiko Nagatani,et al.  A 32-GS/s 6-Bit Double-Sampling DAC in InP HBT Technology , 2009, 2009 Annual IEEE Compound Semiconductor Integrated Circuit Symposium.

[4]  Laurent Schmalen,et al.  Evaluation of left-terminated spatially coupled LDPC codes for optical communications , 2014, 2014 The European Conference on Optical Communication (ECOC).

[5]  Masataka Nakazawa,et al.  1024 QAM (60 Gbit/s) single-carrier coherent optical transmission over 150 km. , 2012, Optics express.

[6]  A. Sano,et al.  100 × 120-Gb/s PDM 64-QAM transmission over 160 km using linewidth-tolerant pilotless digital coherent detection , 2010, 36th European Conference and Exhibition on Optical Communication.

[7]  T. Moon.  Error Correction Coding: Mathematical Methods and Algorithms , 2005 .

[8]  Keang-Po Ho,et al.  Spectral efficiency limits and modulation/detection techniques for DWDM systems , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[9]  Robert H. Walden,et al.  Performance trends for analog to digital converters , 1999, IEEE Commun. Mag..

[10]  A. Gnauck,et al.  112-Gb/s polarization-multiplexed 16-QAM on a 25-GHz WDM grid , 2008, 2008 34th European Conference on Optical Communication.

[11]  Peter J. Winzer,et al.  Single-carrier 400G interface and 10-channel WDM transmission over 4,800 km using all-ETDM 107-Gbaud PDM-QPSK , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[12]  S. J. Savory.  Compensation of fibre impairments in digital coherent systems , 2008, 2008 34th European Conference on Optical Communication.

[13]  J. H. Winters,et al.  Equalization in coherent lightwave systems using a fractionally spaced equalizer , 1990 .

[14]  L.G. Kazovsky,et al.  Homodyne Phase-Shift-Keying Systems: Past Challenges and Future Opportunities , 2006, Journal of Lightwave Technology.

[15]  F. Buchali,et al.  Hybrid modulation formats outperforming 16QAM and 8QAM in transmission distance and filtering with cascaded WSS , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[16]  Daniel W. Hewak,et al.  Fabrication and characterization of continuous wave direct UV (/spl lambda/=244 nm) written channel waveguides in chalcogenide (Ga:La:S) glass , 2002 .

[17]  T J Xia,et al.  End-to-end native IP data 100G single carrier real time DSP coherent detection transport over 1520-km field deployed fiber , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[18]  P. Poggiolini,et al.  Statistical characterization of PM-QPSK signals after propagation in uncompensated fiber links , 2010, 36th European Conference and Exhibition on Optical Communication.

[19]  Andrew J. Viterbi,et al.  Nonlinear estimation of PSK-modulated carrier phase with application to burst digital transmission , 1983, IEEE Trans. Inf. Theory.

[20]  W. R. Bennett,et al.  Spectra of quantized signals , 1948, Bell Syst. Tech. J..

[21]  S.J. Savory,et al.  Compensation of Quadrature Imbalance in an Optical QPSK Coherent Receiver , 2008, IEEE Photonics Technology Letters.

[22]  Ieee Std,et al.  IEEE Standard for Terminology and Test Methods for Analog-to-Digital Converters , 2011 .

[23]  Bernard Carlos Widrow,et al.  Thinking about thinking: the discovery of the LMS algorithm , 2005, IEEE Signal Process. Mag..

[24]  B. Lankl,et al.  Joint equalization and timing recovery for coherent fiber optic receivers , 2008, 2008 34th European Conference on Optical Communication.

[25]  Laurent Schmalen,et al.  Transmission of a 1.1 Tb/s Super Channel in 100 GHz Optical Bandwidth Based on PM-256 QAM and Spatially Coupled FEC , 2013 .

[26]  W. Idler,et al.  40 Gbit/s quaternary dispersion supported transmission over 31 km standard singlemode fibre without optical dispersion compensation , 1998, 24th European Conference on Optical Communication. ECOC '98 (IEEE Cat. No.98TH8398).

[27]  C. E. SHANNON,et al.  A mathematical theory of communication , 1948, MOCO.

[28]  D. V. Plant,et al.  Time domain hybrid QAM based rate-adaptive optical transmissions using high speed DACs , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[29]  Ramesh Pyndiah,et al.  Near-optimum decoding of product codes: block turbo codes , 1998, IEEE Trans. Commun..

[30]  Wilfried Idler,et al.  Modulation formats for 100G and beyond , 2011 .

[31]  Patrick Schulte,et al.  Experimental demonstration of capacity increase and rate-adaptation by probabilistically shaped 64-QAM , 2015, 2015 European Conference on Optical Communication (ECOC).

[32]  Koichi Ishihara,et al.  240-Gb/s polarization-multiplexed 64-QAM modulation and blind detection using PLC-LN hybrid integrated modulator and digital coherent receiver , 2009, 2009 35th European Conference on Optical Communication.

[33]  T. Tanaka,et al.  100 Gb/s optical IM-DD transmission with 10G-class devices enabled by 65 GSamples/s CMOS DAC core , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[34]  F. Hauske,et al.  Joint-polarization carrier phase estimation for XPM-limited coherent polarization-multiplexed QPSK transmission with OOK-neighbors , 2008, 2008 34th European Conference on Optical Communication.

[35]  M. Nishihara,et al.  Experimental demonstration of 448-Gbps+ DMT transmission over 30-km SMF , 2014, OFC 2014.

[36]  P. Poggiolini,et al.  The GN-Model of Fiber Non-Linear Propagation and its Applications , 2014, Journal of Lightwave Technology.

[37]  Andreas Leven,et al.  Spectral pre-distortion with FPGA and DAC at 448-Gb/s DP-16QAM improving nonlinear threshold power , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[38]  H. Yoshida,et al.  Proposal for frame structure of optical channel transport unit employing LDPC codes for 100 Gb/s FEC , 2009, 2009 Conference on Optical Fiber Communication - incudes post deadline papers.

[39]  C. Campopiano,et al.  A Coherent Digital Amplitude and Phase Modulation Scheme , 1962 .

[40]  J. Kahn,et al.  Feedforward Carrier Recovery for Coherent Optical Communications , 2007, Journal of Lightwave Technology.

[41]  Chongjin Xie,et al.  112-Gb/s monolithic PDM-QPSK modulator in silicon. , 2012, Optics express.

[42]  G. Charlet,et al.  Generation and transmission of 21.4-Gbaud PDM 64-QAM using a high-power DAC driving a single I/Q modulator , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[43]  Gregory Raybon,et al.  All-ETDM 107-Gbaud PDM-16QAM (856-Gb/s) transmitter and coherent receiver , 2013 .

[44]  B. Spinnler,et al.  Chromatic dispersion tolerance of coherent optical communications systems with electrical equalization , 2006, 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference.

[45]  Laurent Schmalen,et al.  Status and Recent Advances on Forward Error Correction Technologies for Lightwave Systems , 2014, Journal of Lightwave Technology.

[46]  A. Leven,et al.  Frequency Estimation in Intradyne Reception , 2007, IEEE Photonics Technology Letters.

[47]  Gabriel Charlet,et al.  Spectrally Efficient 1-Tb/s Transceivers for Long-Haul Optical Systems , 2015, Journal of Lightwave Technology.

[48]  Bernhard Spinnler,et al.  Equalizer Design and Complexity for Digital Coherent Receivers , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[49]  Gabriel Charlet,et al.  1-Terabit/s net data-rate transceiver based on single-carrier Nyquist-shaped 124 GBaud PDM-32QAM , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[50]  Robert G. Gallager,et al.  Low-density parity-check codes , 1962, IRE Trans. Inf. Theory.

[51]  S. Savory,et al.  Blind Equalization and Carrier Phase Recovery in a 16-QAM Optical Coherent System , 2009, Journal of Lightwave Technology.

[52]  I.B. Djordjevic,et al.  Next Generation FEC for High-Capacity Communication in Optical Transport Networks , 2009, Journal of Lightwave Technology.

[53]  Seb J Savory,et al.  Digital filters for coherent optical receivers. , 2008, Optics express.

[54]  Takashi Mizuochi,et al.  A triple-concatenated FEC using soft-decision decoding for 100 Gb/s optical transmission , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[55]  Amirhossein Ghazisaeidi,et al.  Transoceanic Transmission Systems Using Adaptive Multirate FECs , 2015, Journal of Lightwave Technology.

[56]  J.-X Cai,et al.  54 Tb/s transmission over 9,150 km with optimized hybrid Raman-EDFA amplification and coded modulation , 2014, 2014 The European Conference on Optical Communication (ECOC).

[57]  Pieter W. Hooijmans,et al.  Coherent Optical System Design , 1994 .

[58]  Robert W. Tkach.  Scaling optical communications for the next decade and beyond , 2010 .

[59]  S. Norimatsu,et al.  An 8 Gb/s QPSK optical homodyne detection experiment using external-cavity laser diodes , 1992, IEEE Photonics Technology Letters.

[60]  Laurent Schmalen,et al.  Implementation Aspects of Coherent Transmit and Receive Functions in Application-Specific Integrated Circuits , 2013 .

[61]  Laurent Schmalen,et al.  Optimization of time-division hybrid-modulation and its application to rate adaptive 200Gb transmission , 2014, 2014 The European Conference on Optical Communication (ECOC).

[62]  S. Mitra,et al.  A unified approach to time- and frequency-domain realization of FIR adaptive digital filters , 1983 .

[63]  Christian Neumeyr,et al.  400-Gb/s PDM-4PAM WDM System Using a Monolithic 2×4 VCSEL Array and Coherent Detection , 2015, Journal of Lightwave Technology.

[64]  J. D'Ambrosia.  100 gigabit Ethernet and beyond [Commentary] , 2010 .

[65]  M. Nakazawa,et al.  A $\lambda/4$-Shifted Distributed-Feedback Laser Diode With a Fiber Ring Cavity Configuration Having an OSNR of 85 dB and a Linewidth of 7 kHz , 2008, IEEE Photonics Technology Letters.

[66]  Leonid G. Kazovsky,et al.  Wide-linewidth phase diversity homodyne receivers , 1988 .

[67]  Patrick Schulte,et al.  Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration , 2016, Journal of Lightwave Technology.

[68]  Tobias Ellermeyer,et al.  DA and AD converters in SiGe technology: Speed and resolution for ultra high data rate applications , 2010, 36th European Conference and Exhibition on Optical Communication.

[69]  S. Chandrasekhar,et al.  1-Tb/s dual-carrier 80-GBaud PDM-16QAM WDM transmission at 5.2 b/s/Hz over 3200 km , 2012, IEEE Photonics Conference 2012.

[70]  Laurent Schmalen,et al.  1-Tb/s Transceiver Spanning over just Three 50-GHz Frequency Slots for Long-Haul Systems , 2013 .

[71]  D. Godard,et al.  Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems , 1980, IEEE Trans. Commun..

[72]  Peter J. Winzer,et al.  High Symbol Rate Coherent Optical Transmission Systems: 80 and 107 Gbaud , 2014, Journal of Lightwave Technology.

[73]  Masataka Nakazawa,et al.  256 QAM (64 Gbit/s) coherent optical transmission over 160 km with an optical bandwidth of 5.4 GHz , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[74]  Gabriella Bosco,et al.  EGN model of non-linear fiber propagation. , 2014, Optics express.

[75]  H. Tanaka,et al.  Optical OFDM, a hype or is it for real? , 2008, 2008 34th European Conference on Optical Communication.

[76]  Takehiro Tsuritani,et al.  114 space-division-multiplexed transmission over 9.8-km weakly-coupled-6-mode uncoupled-19-core fibers , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[77]  Y. Miyamoto,et al.  High-order QAM transmission for spectrally-efficient and high-capacity transport , 2012, OFC/NFOEC.

[78]  Laurent Schmalen,et al.  Spatially Coupled Soft-Decision Error Correction for Future Lightwave Systems , 2015, Journal of Lightwave Technology.

[79]  Heinrich Meyr,et al.  Digital filter and square timing recovery , 1988, IEEE Trans. Commun..

[80]  Polina Bayvel,et al.  LDPC codes for optical channels: Is the “FEC limit” a good predictor of post-FEC BER? , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[81]  P. Winzer,et al.  Capacity Limits of Optical Fiber Networks , 2010, Journal of Lightwave Technology.

[82]  S. Bhandare,et al.  First Real-Time Data Recovery for Synchronous QPSK Transmission With Standard DFB Lasers , 2006, IEEE Photonics Technology Letters.

[83]  A. Gnauck,et al.  Penalties from in-band crosstalk for advanced optical modulation formats , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[84]  M. Nakazawa,et al.  2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz , 2014, OFC 2014.

[85]  Floyd M. Gardner,et al.  A BPSK/QPSK Timing-Error Detector for Sampled Receivers , 1986, IEEE Trans. Commun..

[86]  Laurent Schmalen,et al.  Implementation of 64QAM at 42.66 GBaud using 1.5 samples per symbol DAC and demonstration of up to 300 km fiber transmission , 2014, OFC 2014.