TY - JOUR
T1 - Beyond 1.6 Tb/s Net Rate PAM Signal Transmission for Rack-Rack Optical Interconnects with Mode and Wavelength Division Multiplexing
AU - Zou, Dongdong
AU - Li, Fan
AU - Wang, Wei
AU - Zhang, Zixuan
AU - Hu, Jinkun
AU - Li, Jianping
AU - Sui, Qi
AU - Lu, Chao
AU - Li, Zhaohui
N1 - Funding Information:
Manuscript received April 28, 2020; revised August 17, 2020 and September 30, 2020; accepted October 1, 2020. Date of publication October 8, 2020; date of current version January 15, 2021. This work was supported in part by the National Key R&D Program of China under Grant 2018YFB1800902; in part by the Fundamental and Applied Basic Research Project of Guangzhou City under Grant 202002030326; in part by the Local Innovation and Research Teams Project of Guangdong Pearl River Talents Program under Grant 2017BT01X121; in part by the Pearl River S&T Nova Program of Guangzhou under Grant 201710010051 and Grant 2018B010114002; and in part by the National Natural Science Foundation of China under Grant 61871408. (Corresponding Author: Fan Li; Jianping Li.) Dongdong Zou, Fan Li, Wei Wang, and Zixuan Zhang are with the Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510275, China (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1983-2012 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/1/15
Y1 - 2021/1/15
N2 - In this article, a beyond 1.6 Tb/s net rate pulse amplitude modulation (PAM) communication system is experimentally demonstrated for 20 m rack-rack optical interconnects with low cost intensity modulation direct detection (IM-DD) architecture, which is enabled by mode division multiplexing (MDM) and wavelength division multiplexing (WDM). The MDM with three linearly polarized modes is realized by a multiplane light conversion (MPLC) mode multiplexer with the maximum modal crosstalk less than - 20 dB. The experimental results show that 2.01 Tb/s (1.84 Tb/s net rate) PAM-6 signal carried on three modes and four wavelengths is successfully transmitted over 20 m standard OM2 multimode fiber (MMF) with the BERs of received signals from all channels below hard decision forward error correction (HD-FEC) threshold of 3.8 × 10-3. Look-up table (LUT) pre-distortion and Volterra nonlinear equalizer (VNLE) are employed for nonlinear impairment mitigation to improve the system performance. Compared to linear feedforward equalizer (FFE), 0.3 dB and 1 dB receiver sensitivity improvements are obtained by LUT and VNLE, respectively. To the best of our knowledge, our proposed scheme achieves the highest bit rate of 167.5 Gb/s per wavelength in MDM system with IM-DD structure. The experimental results show that our proposed PAM MDM communication scheme is a promising candidate for future 1.6 Tb/s short reach rack-rack optical interconnects.
AB - In this article, a beyond 1.6 Tb/s net rate pulse amplitude modulation (PAM) communication system is experimentally demonstrated for 20 m rack-rack optical interconnects with low cost intensity modulation direct detection (IM-DD) architecture, which is enabled by mode division multiplexing (MDM) and wavelength division multiplexing (WDM). The MDM with three linearly polarized modes is realized by a multiplane light conversion (MPLC) mode multiplexer with the maximum modal crosstalk less than - 20 dB. The experimental results show that 2.01 Tb/s (1.84 Tb/s net rate) PAM-6 signal carried on three modes and four wavelengths is successfully transmitted over 20 m standard OM2 multimode fiber (MMF) with the BERs of received signals from all channels below hard decision forward error correction (HD-FEC) threshold of 3.8 × 10-3. Look-up table (LUT) pre-distortion and Volterra nonlinear equalizer (VNLE) are employed for nonlinear impairment mitigation to improve the system performance. Compared to linear feedforward equalizer (FFE), 0.3 dB and 1 dB receiver sensitivity improvements are obtained by LUT and VNLE, respectively. To the best of our knowledge, our proposed scheme achieves the highest bit rate of 167.5 Gb/s per wavelength in MDM system with IM-DD structure. The experimental results show that our proposed PAM MDM communication scheme is a promising candidate for future 1.6 Tb/s short reach rack-rack optical interconnects.
KW - intensity modulation direct detection (IM-DD)
KW - Mode division multiplexing (MDM)
KW - multimode fiber (MMF)
KW - optical fiber communication
KW - pulse amplitude modulation (PAM)
KW - rack-rack optical interconnects
UR - http://www.scopus.com/inward/record.url?scp=85098849807&partnerID=8YFLogxK
U2 - 10.1109/JLT.2020.3029571
DO - 10.1109/JLT.2020.3029571
M3 - Journal article
AN - SCOPUS:85098849807
SN - 0733-8724
VL - 39
SP - 340
EP - 346
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 2
M1 - 9217917
ER -