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
- Vol. 38, Iss: 2, pp 492-503
TLDR
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.Abstract:
Client-side optics are facing an ever-increasing upgrading pace, driven by upcoming 5G related services and datacenter applications. The demand for a single lane data rate is soon approaching 200 Gbps. To meet such high-speed requirement, all segments of traditional intensity modulation direct detection (IM/DD) technologies are being challenged. The characteristics of electrical and optoelectronic components and the performance of modulation, coding, and digital signal processing (DSP) techniques are being stretched to their limits. In this context, we witnessed technological breakthroughs in several aspects, including development of broadband devices, novel modulation formats and coding, and high-performance DSP algorithms for the past few years. A great momentum has been accumulated to overcome the aforementioned challenges. In this article, we focus on IM/DD transmissions, and provide an overview of recent research and development efforts on key enabling technologies for 200 Gbps per lane and beyond. Our recent demonstrations of 200 Gbps short-reach transmissions with 4-level pulse amplitude modulation (PAM) and discrete multitone signals are also presented as examples to show the system requirements in terms of device characteristics and DSP performance. Apart from digital coherent technologies and advanced direct detection systems, such as Stokes–vector and Kramers–Kronig schemes, we expect 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.read more
Citations
More filters
80 km IM-DD transmission for 100 Gb/s per lane enabled by DMT and nonlinearity management
Weizhen Yan,Lei Li,Bo Liu,Hao Chen,Zhenning Tao,Toshiki Tanaka,Tomoo Takahara,Jens C. Rasmussen,Tomislav Drenski +8 more
TL;DR: In this paper, a single wavelength and polarization IM-DD transmission over 40km SMF was first enabled by DMT and the nonlinearity management through parameter optimization and digital compensation was discussed.
Journal ArticleDOI
Analog Coherent Detection for Energy Efficient Intra-Data Center Links at 200 Gbps Per Wavelength
Takako Hirokawa,Sergio Pinna,Navid Hosseinzadeh,Aaron Maharry,Hector Andrade,Junqian Liu,Thomas Meissner,Stephen Misak,Ghazal Movaghar,Luis A. Valenzuela,Yujie Xia,Shireesh Bhat,Fabrizio Gambini,Jonathan Klamkin,Adel A. M. Saleh,Larry A. Coldren,James F. Buckwalter,Clint L. Schow +17 more
TL;DR: In this article, the power consumption of all the photonic and electronic components necessary to realize an ACD link architecture based on 50 Gbaud (GBd) quadrature phase-shift keying (QPSK) signaling combined with polarization multiplexing to achieve 200 Gb/s/λ was analyzed.
Journal ArticleDOI
800 Gbit/s transmission over 1 km single-mode fiber using a four-channel silicon photonic transmitter
Hongguang Zhang,Miaofeng Li,Yuguang Zhang,Di Zhang,Qiwen Liao,Jian He,Hu Shenglei,Bo Zhang,Lei Wang,Xi Xiao,Nan Qi,Shaohua Yu +11 more
TL;DR: In this article, the authors demonstrate the optical transmission of an 800 Gbit/s (4×200 Gbps) PAM-4 signal and a 480 Gbps OOK signal by using a high-bandwidth (BW) silicon photonic (SiP) transmitter with the aid of digital signal processing (DSP).
Journal ArticleDOI
Feedforward and Recurrent Neural Network-Based Transfer Learning for Nonlinear Equalization in Short-Reach Optical Links
TL;DR: In this paper, transfer learning-aided feed-forward neural networks (FNNs) and RNNs are used for nonlinear equalization in short-reach direct detection optical links, which enables a fast transition to new equalizers when the channel condition is changed.
Journal ArticleDOI
C-band 67 GHz silicon photonic microring modulator for dispersion-uncompensated 100 Gbaud PAM-4.
TL;DR: In this article , a very high-bandwidth integrated silicon microring modulator (MRM) designed on a commercial silicon photonics (SiP) platform for C-band operation is presented.
References
More filters
Journal ArticleDOI
Multicarrier modulation for data transmission: an idea whose time has come
TL;DR: The general technique of parallel transmission on many carriers, called multicarrier modulation (MCM), is explained, and the performance that can be achieved on an undistorted channel and algorithms for achieving that performance are discussed.
Journal ArticleDOI
Adaptive equalization
TL;DR: In this article, the authors give an overview of the current state of the art in adaptive equalization and discuss the convergence and steady-state properties of least mean square (LMS) adaptation algorithms.
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.
Adaptive equalization
TL;DR: This tutorial paper gives an overview of the current state of the art in adaptive equalization and discusses the convergence and steady-state properties of least mean-square (LMS) adaptation algorithms, including digital precision considerations, and three classes of rapidly converging adaptive equalizer algorithms.
Journal ArticleDOI
On the distribution of the peak-to-average power ratio in OFDM signals
Hideki Ochiai,Hideki Imai +1 more
TL;DR: A simple closed-form approximation for the distribution of the peak-to-average power ratio (PAPR) in strictly band-limited orthogonal frequency-division multiplexing (OFDM) signals is developed, based on the level-crossing rate analysis.