title: Coherent optical DFT-spread OFDM transmission using orthogonal band multiplexing.
abstract: Coherent optical OFDM (CO-OFDM) combined with orthogonal band multiplexing provides a scalable and flexible solution for achieving ultra high-speed rate. Among many CO-OFDM implementations, digital Fourier transform spread (DFT-S) CO-OFDM is proposed to mitigate fiber nonlinearity in long-haul transmission. In this paper, we first illustrate the principle of DFT-S OFDM. We then experimentally evaluate the performance of coherent optical DFT-S OFDM in a band-multiplexed transmission system. Compared with conventional clipping methods, DFT-S OFDM can reduce the OFDM peak-to-average power ratio (PAPR) value without suffering from the interference of the neighboring bands. With the benefit of much reduced PAPR, we successfully demonstrate 1.45 Tb/s DFT-S OFDM over 480 km SSMF transmission.
authors.affiliation: State Key Laboratory of Optical Communication Technologies and Networks, Wuhan, China. qyang@wri.com.cn
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.forename: Zhixue
authors.initials: Z
authors.lastname: He
authors.forename: Zhu
authors.initials: Z
authors.lastname: Yang
authors.forename: Shaohua
authors.initials: S
authors.lastname: Yu
authors.forename: Xingwen
authors.initials: X
authors.lastname: Yi
authors.forename: William
authors.initials: W
authors.lastname: Shieh
mesh_terms: D000465:Algorithms; D016477:Artifacts; D005336:Fiber Optic Technology / Q000379:methods*; D005583:Fourier Analysis; D012815:Signal Processing, Computer-Assisted; D013685:Telecommunications