Field Trial Nyquist-WDM Transmission of 8×216.4Gb/s PDM-CSRZ-QPSK Exceeding 4b/s/Hz Spectral Efficiency

Yu, Jianjun; Dong, Ze; Chien, Hung‐Chang; Jia, Zhensheng; Huo, Di; Hong, Yang; Li, Meng; Lu, Nan; Xie, Li; Li, Kai; Zhang, Xiaochao; Xia, Yan; Cai, Yao; Gunkel, Matthias; Wagner, P.; Mayer, H.P.; Schippel, Achim

doi:10.1364/nfoec.2012.pdp5d.3

Cited by 5 publications

(8 citation statements)

References 2 publications

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“…et al proposed a novel low-complexity receiver-side duobinary shaping scheme for spectrally-efficient pre-filtered WDM systems [7], [8]. This new solution, namely receiver-side duobinaryshaped WDM (RS-DBS-WDM), has been successfully applied in a field trial to enable a comparable spectral efficiency to Nyquist-WDM and OFDM [9]. Besides Nyquist-WDM and OFDM, RS-DBS-WDM can also be used to form multicarrier superchannels.…”

Section: Multicarrier Group Detection In Receiver-side Duobinary-shapmentioning

confidence: 99%

“…The butterfly T /4-spaced finite impulse response (FIR) filters with 15 taps each were adapted by the classic constant modulus algorithm (CMA). After the carrier recovery including frequency offset estimation and carrier phase estimation, the duobinary-shaping post-filter and maximum-likelihood sequence detection (MLSD) were used [7]- [9]. Finally, the bit error ratio (BER) was calculated.…”

Section: Simulationsmentioning

confidence: 99%

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Multicarrier Group Detection in Receiver-Side Duobinary-Shaped WDM Superchannel Systems

Wang

Kong

et al. 2012

IEEE Photon. Technol. Lett.

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Spectrally efficient multicarrier superchannel is a promising technique to address the great challenges for optical transmission systems beyond 100 G. Based on the previously reported receiver-side duobinary-shaped wavelengthdivision multiplexing (RS-DBS-WDM) scheme, we propose to apply the multicarrier group detection method for the RS-DBS-WDM superchannels to further improve the sampling efficiencies. The tolerance of the RS-DBS-WDM systems with three-carrier group detection to the transceiver bandwidth constraint is investigated by simulations. Proof-of-concept experiments were carried out to demonstrate the feasibility of three-carrier group detection.Index Terms-Coherent optical communications, sampling efficiency, superchannels, wavelength-division multiplexing (WDM).

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Section: Multicarrier Group Detection In Receiver-side Duobinary-shapmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

Multicarrier Group Detection in Receiver-Side Duobinary-Shaped WDM Superchannel Systems

Wang

Kong

et al. 2012

IEEE Photon. Technol. Lett.

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“…sub-Nyquist WDM. It enables smooth upgrading capability from the commercial 100G WDM systems by narrowing the channel spacing [10,11,13] or increasing the symbol rate [12,14]. Like OFDM and Nyquist-WDM, the proposed technique has also been proposed to build up multi-carrier superchannels beyond 100G [15].…”

Section: Introductionmentioning

confidence: 99%

Transmission of 1936 Tb/s (11 × 176 Gb/s) DP-16QAM superchannel signals over 640 km SSMF with EDFA only and 300 GHz WSS channel

Li¹,

Karlsson²,

Andrekson³

et al. 2012

Opt. Express

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With an improved receiver-side spectral shaping technique by introducing and optimizing one tap coefficient in the intermediate response, we successfully transmitted 1.936 Tb/s (11 × 176 Gb/s) DP-16QAM superchannel signal over 8 × 80 km SSMF with EDFA-only and two 280 GHz wavelength selective switches (WSSs) in support of future 1.6 Tb/s Ethernet with up to 20% forward error correction overhead. The 280 GHz 3-dB bandwidth of the WSS passband permits a sufficient guardband if the 1.936 Tb/s superchannel signals are placed in a 300 GHz WSS channel.

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“…100G and 200G coherent optical communications [1]- [7]. The transmission of 100G channels (107-112 Gb/s including overhead for forward error correction (FEC)) on existing optical line systems designed for 50 GHz or even 25 GHz channel spacing presents a difficult challenge due to the limited optical bandwidth available for each channel [5]- [7].…”

mentioning

confidence: 99%

“…The transmission of 100G channels (107-112 Gb/s including overhead for forward error correction (FEC)) on existing optical line systems designed for 50 GHz or even 25 GHz channel spacing presents a difficult challenge due to the limited optical bandwidth available for each channel [5]- [7]. It has been demonstrated a SE of bit/s/Hz by using the QDB format and PolMux scheme with enhanced tolerance to the narrow optical filtering, which provides a practical means for achieving the Nyquist limit of spectral efficiency for a given baud rate [1], [7]. However, due to constellation zero point caused by filtering effect, the conventional constant modulus blind equalizations (CMBE) algorithms for polarization multiplexed (PM) QPSK coherent detection are not well compatible [4], [5].…”

mentioning

confidence: 99%

Multi-Modulus Blind Equalizations for Coherent Quadrature Duobinary Spectrum Shaped PM-QPSK Digital Signal Processing

Zhang

Chi

et al. 2013

J. Lightwave Technol.

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A novel digital signal processing (DSP) scheme for quadrature duobinary (QDB) spectrum shaped polarization multiplexed quadrature phase shift keying (PM-QPSK) based on multi-modulus blind equalizations (MMBE) is proposed and demonstrated with both simulation and experimental results. The key algorithms for this novel digital signal processing scheme include the cascaded multi-modulus algorithm (CMMA) for blind polarization de-multiplexing, multi-modulus QPSK partitioning frequency offset estimation (FOE) and two stage carrier phase recovery (CPR) with maximum likelihood phase estimation. The final signal is detected by maximum-likelihood sequence detection (MLSD) for data BER measurement. It shows that CMMA have better frequency response performance compared with CMA for noise compression. The performances of FOE and CPR are also investigated with different spectrum shaping bandwidth, group size and laser linewidth. Finally, the feasibility of the proposed digital signal processing scheme is demonstrated by the experiment of 112 Gb/s QDB spectrum shaped PM-QPSK signal with a 25 GHz bandwidth waveshaper for Nyquist WDM channels.

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Field Trial Nyquist-WDM Transmission of 8×216.4Gb/s PDM-CSRZ-QPSK Exceeding 4b/s/Hz Spectral Efficiency

Cited by 5 publications

References 2 publications

Multicarrier Group Detection in Receiver-Side Duobinary-Shaped WDM Superchannel Systems

Multicarrier Group Detection in Receiver-Side Duobinary-Shaped WDM Superchannel Systems

Transmission of 1936 Tb/s (11 × 176 Gb/s) DP-16QAM superchannel signals over 640 km SSMF with EDFA only and 300 GHz WSS channel

Multi-Modulus Blind Equalizations for Coherent Quadrature Duobinary Spectrum Shaped PM-QPSK Digital Signal Processing

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