title: Orthogonal-band-multiplexed offset-QAM optical superchannel generation and coherent detection.
abstract: Nowadays the Internet not only has fast growing data traffic, but also has a fast growing number of on-line devices. This leads to high demand of capacity and flexibility of the future networks. The conventional Orthogonal Frequency Division Multiplexing (OFDM) and Nyquist pulse shaping signals have the advantage of high spectral efficiency when consisting of superchannels in the Wavelength-Division-Multiplexing (WDM) way. However, they face a cost issue when the spectral granularity of the superchannel is decreased to support more users. This paper proposes for the first time the scheme of Orthogonal-band-multiplexed offset-Quadrature Amplitude Modulation (OBM-OQAM) superchannel. OBM-OQAM superchannel provides large capacity and high spectral efficiency. Furthermore, it has the advantage of offering subbands of variable symbol rate without changing the system configuration. We provide a proof-of-principle demonstration of OBM-OQAM superchannel transmission. In our experiment, 400 Gbps 16 Quadrature Amplitude Modulation (QAM) OBM-OQAM superchannel transmission over 400 km Standard Single Mode Fiber (SSMF) is conducted. The experimental results show that the OBM-OQAM signal has low penalty in multi-band aggregation.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Zhennan
authors.initials: Z
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Lv
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Kaiheng
authors.initials: K
authors.lastname: Zou
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Yixiao
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.|State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, 100871, China.
authors.forename: Zhangyuan
authors.initials: Z
authors.lastname: Chen