Journal ArticleDOI
Nonlinearity-aware 200 Gbit/s DMT transmission for C-band short-reach optical interconnects with a single packaged electro-absorption modulated laser
Lu Zhang,Xuezhi Hong,Xiaodan Pang,Oskars Ozolins,Aleksejs Udalcovs,Richard Schatz,Changjian Guo,Junwei Zhang,Fredrik Nordwall,Klaus M. Engenhardt,Urban Westergren,Sergei Popov,Gunnar Jacobsen,Shilin Xiao,Weisheng Hu,Jiajia Chen +15 more
TLDR
The nonlinearity-aware digital signal processing algorithm for channel equalization is mathematically described, which improves the signal-to-noise ratio up to 3.5 dB.Abstract:
We experimentally demonstrate the transmission of a 200 Gbit/s discrete multitone (DMT) at the soft forward error correction limit in an intensity-modulation direct-detection system with a single C-band packaged distributed feedback laser and traveling-wave electro absorption modulator (DFB-TWEAM), digital-to-analog converter and photodiode. The bit-power loaded DMT signal is transmitted over 1.6 km standard single-mode fiber with a net rate of 166.7 Gbit/s, achieving an effective electrical spectrum efficiency of 4.93 bit/s/Hz. Meanwhile, net rates of 174.2 Gbit/s and 179.5 Gbit/s are also demonstrated over 0.8 km SSMF and in an optical back-to-back case, respectively. The feature of the packaged DFB-TWEAM is presented. The nonlinearity-aware digital signal processing algorithm for channel equalization is mathematically described, which improves the signal-to-noise ratio up to 3.5 dB.read more
Citations
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Journal ArticleDOI
200 Gbps/Lane IM/DD Technologies for Short Reach Optical Interconnects
Xiaodan Pang,Weisheng Hu,Gunnar Jacobsen,Sergei Popov,Jiajia Chen,Oskars Ozolins,Rui Lin,Lu Zhang,Aleksejs Udalcovs,Lei Xue,Richard Schatz,Urban Westergren,Shilin Xiao +12 more
TL;DR: This article focuses on IM/DD transmissions, and provides an overview of recent research and development efforts on key enabling technologies for 200 Gbps per lane and beyond, and expects high-speed IM/ DD systems will remain advantageous in terms of system cost, power consumption, and footprint for short reach applications in the short- to mid- term perspective.
Journal ArticleDOI
26.8-m THz wireless transmission of probabilistic shaping 16-QAM-OFDM signals
Shiwei Wang,Zijie Lu,Wei Li,Shi Jia,Lu Zhang,Mengyao Qiao,Xiaodan Pang,Nazar Muhammad Idrees,Muhammad Saqlain,Xiang Gao,Xiaoxiao Cao,Changxing Lin,Qiuyu Wu,Xianmin Zhang,Xianbin Yu +14 more
TL;DR: This work presents an experimental demonstration of a single-channel THz radio-over-fiber (RoF) system operating at 350 GHz, achieving beyond 100 Gbit/s data rate over a 10-km fiber plus a >20-m wireless link, without using any THz amplifiers.
Journal ArticleDOI
Enabling Technologies for Optical Data Center Networks: Spatial Division Multiplexing
TL;DR: This tutorial provides an overview of the components, transmission options, and interconnect architectures for SDM-based DCNs, as well as potential technical challenges and future directions, and covers the co-existence of SDM and other multiplexing techniques, such as wavelength-divisionmultiplexing and flexible spectrumMultiplexing, in optical DCNs.
Journal ArticleDOI
140/180/204-Gbaud OOK Transceiver for Inter- and Intra-Data Center Connectivity
Jose Estaran,Haik Mardoyan,Filipe Jorge,Oskars Ozolins,Aleksejs Udalcovs,Agnieszka Konczykowska,Muriel Riet,B. Duval,Virginie Nodjiadjim,Jean-Yves Dupuy,Xiaodan Pang,Urban Westergren,Jiajia Chen,Sergei Popov,Sebastien Bigo +14 more
TL;DR: An on–off keying intensity-modulation and direct-detection C-band optical transceiver capable of addressing all datacenter interconnect environments at well beyond 100 Gbaud is reported on, drawing conclusions from the observed system-level limitations of the respective environments at this ultrahigh baudrate.
Proceedings ArticleDOI
Beyond 200-Gb/s DMT Transmission Over 2-km SMF Based on A Low-Cost Architecture with Single-Wavelength, Single-DAC/ADC and Single-PD
TL;DR: A net data-rate of 200-Gb/s DMT with a record sensitivity of −12.8 dBm is demonstrated using HD-FEC and a maximum capacity up to 250 Gb/s is successfully transmitted over 0-km, 1-km and 2-km SMF.
References
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Journal ArticleDOI
A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels
TL;DR: A finite-granularity, loading algorithm for a discrete multitone (DMT) modulation system that offers significant implementational advantages over the well-known water-pouring method and the earlier Hughes-Hartogs algorithm while typically suffering only negligible performance degradation relative to the optimal solution.
Proceedings ArticleDOI
LDPC convolutional codes using layered decoding algorithm for high speed coherent optical transmission
Deyuan Chang,Fan Yu,Zhiyu Xiao,Nebojsa Stojanovic,Fabian N. Hauske,Yi Cai,Changsong Xie,Liangchuan Li,Xiaogeng Xu,Qianjin Xiong +9 more
TL;DR: The first layered decoding for LDPC convolutional codes designed for application in high speed optical transmission systems was successfully realized.
Journal ArticleDOI
Experimental Demonstration of Four-Channel WDM 560 Gbit/s 128QAM-DMT Using IM/DD for 2-km Optical Interconnect
TL;DR: In this article, a four-channel wavelength-division-multiplex (WDM) 560 Gbit/s 128 quadrature amplitude modulation (128QAM)-discrete multi-tone (DMT) signal transmission in a short reach interconnect is demonstrated, where coordinated discrete Fourier transform spread and preequalization are jointly used to simultaneously overcome serious frequency domain power attenuation and reduce the peak-to-average power ratio of the DMT signal.
Journal ArticleDOI
100 GHz Externally Modulated Laser for Optical Interconnects
Oskars Ozolins,Xiaodan Pang,Miguel Iglesias Olmedo,Aditya Kakkar,Aleksejs Udalcovs,Simone Gaiarin,Jaime Rodrigo Navarro,Klaus M. Engenhardt,Tadeusz Asyngier,Richard Schatz,Jie Li,Fredrik Nordwall,Urban Westergren,Darko Zibar,Sergei Popov,Gunnar Jacobsen +15 more
TL;DR: In this article, a 116 Gb/s on-off keying (OOK), four PAM and 8 PAM optical transmitter using an InP-based integrated and packaged externally modulated laser for high-speed optical interconnects with up to 30dB static extinction ratio and over 100-GHz 3dB bandwidth with 2 dB ripple.
Journal ArticleDOI
84-, 100-, and 107-GBd PAM-4 Intensity-Modulation Direct-Detection Transceiver for Datacenter Interconnects
Haik Mardoyan,M. A. Mestre,Jose Estaran,Filipe Jorge,Fabrice Blache,Philippe Angelini,Agnieszka Konczykowska,Muriel Riet,Virginie Nodjiadjim,Jean-Yves Dupuy,Sebastien Bigo +10 more
TL;DR: An ultrahigh-speed PAM-based IM/DD optical subsystem featuring compact signal generation and tractable digital-processing complexity and how the complexity of the feed-forward equalizer can be considerably reduced by stacking a <3-symbol memory sequence estimator is reported on.