Joint Digital Signal Processing Receivers for Spatial Superchannels

Feuer, M.D.; Nelson, L.E.; Zhou, Xiang; Woodward, S.L.; Isaac, R.; Zhu, Bin; Taunay, T. F.; Fishteyn, M.; Fini, John M.; Yan, M. F.

doi:10.1109/lpt.2012.2220672

Cited by 117 publications

(87 citation statements)

References 8 publications

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“…The processing of these individual channels simultaneously can be resource intensive and particularly challenging for hardware implementation in ASICs and FPGAs. Manuscript An advantage with SDM is that strongly coupled spatial modes experience common-mode impairments, such as chromatic dispersion, and frequency and phase fluctuations from the transmitter side laser and local oscillator (LO) [6]. The latter is traditionally recovered using N carrier phase estimation (CPE) blocks [7], where N is equal to the number of transmitted channels.…”

Section: Introductionmentioning

confidence: 99%

Single DPLL Joint Carrier Phase Compensation for Few-Mode Fiber Transmission

Uden

Okonkwo

Sleiffer

et al. 2013

IEEE Photon. Technol. Lett.

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A carrier phase estimation and compensation algorithm using a digital phase locked loop is proposed which exploits the common-mode impairment from the shared local oscillator at the receiver side in a few-mode fiber transmission system. We verify that the proposed algorithm is more tolerant to phasemismatches than earlier work. The carrier phase estimation (CPE) scheme is evaluated for a 3 × 112 Gbit/s dual polarization quadrature phase shift keying mode division multiplexed transmission over 80 km including an in-line multimode erbium doped fiber amplifier. The digital signal processing computational complexity is reduced in comparison to a traditional CPE stage. In addition, the proposed scheme is shown to perform similarly with respect to the 3.8 × 10 −3 forward error correcting limit optical signal to noise ratio tolerance of the traditional CPE scheme.

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Section: Introductionmentioning

confidence: 99%

Single DPLL Joint Carrier Phase Compensation for Few-Mode Fiber Transmission

Uden

Okonkwo

Sleiffer

et al. 2013

IEEE Photon. Technol. Lett.

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“…The dynamic skew between several core pairs of the fiber was measured to vary over only a few picoseconds range in 24 h in a lab condition. Such low variation in propagation delays between SDM channels is expected to be advantageous with respect to sharing of both transmitter hardware and DSP resources for which spatial super channels (SSC) were originally proposed [46]. In the SSC transmission scheme, groups of same-wavelength subchannels are transmitted through parallel spatial channels sharing the same light source and local oscillator.…”

Section: Mcf Transmissionmentioning

confidence: 99%

Review of Space-Division Multiplexing Technologies in Optical Communications

Awaji¹

2019

IEICE Trans. Commun.

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SUMMARYThe potential transmission capacity of a standard single-mode fiber peaks at around 100 Tb/s owing to fiber nonlinearity and the bandwidth limitation of amplifiers. As the last frontier of multiplexing, space-division multiplexing (SDM) has been studied intensively in recent years. Although there is still time to deploy such a novel fiber communication infrastructure; basic research on SDM has been carried out. Therefore, a comprehensive review is worthwhile at this time toward further practical investigations.

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“…In an SDM system based on MCF, it is envisaged that different channels experience the same environmental disturbances. This was investigated for spatial super-channels where long-term differential phase drift was shown to vary more slowly with absolute variation 90% lower over 400 us [19]. Such a feature is advantageous for SHD, which relies on matching the path length between pilot-tone and information channels for strong phase noise cancellation.…”

Section: Sdm-shd: Implementations and Developmentsmentioning

confidence: 99%

“…Previously, architecture-on-demand (AoD) nodes have been widely proposed and also demonstrated to incorporate SDM links [57,58], and reconfigurable add-and-drop-multiplexers (ROADM) designs for the switching of spatial super-channels [19,59] in MCFs have also been proposed. In [60], a reconfigurable SDM-WDM hybrid add-drop node capable of routing both signals and PTs was demonstrated for 100 Gb/s PDM-QPSK signals.…”

Section: Moves Towards Networkingmentioning

confidence: 99%

“…In SHD schemes, the path length alignment between signal and PT can impact phase noise cancellation, particularly in the presence of fiber non-linearities [3]. For SDM systems using MCF, it is envisaged that different cores of the same fiber experience the same environmental disturbances during transmission, and thus, path length variations between channels are minimized compared to a system comprising parallel single core or ribbon fibers [19].…”

Section: Introductionmentioning

confidence: 99%

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Self-Homodyne Detection in Optical Communication Systems

et al. 2014

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Abstract:We review work on self-homodyne detection (SHD) for optical communication systems. SHD uses a transmitted pilot-tone (PT), originating from the transmitter laser, to exploit phase noise cancellation at a coherent receiver and to enable transmitter linewidth tolerance and potential energy savings. We give an overview of SHD performance, outlining the key contributors to the optical signal-to-noise ratio penalty compared to equivalent intradyne systems, and summarize the advantages, differences and similarities between schemes using polarization-division multiplexed PTs (PDM-SHD) and those using space-division multiplexed PTs (SDM-SHD). For PDM-SHD, we review the extensive work on the transmission of advanced modulation formats and techniques to minimize the trade-off with spectral efficiency, as well as recent work on digital SHD, where the SHD receiver is combined with an polarization-diversity ID front-end receiver to provide both polarization and modulation format alignment. We then focus on SDM-SHD systems, describing experimental results using multi-core fibers (MCFs) with up to 19 cores, including high capacity transmission with broad-linewidth lasers and experiments incorporating SDM-SHD in networking. Additionally, we discuss the requirement for polarization tracking of the PTs at the receiver and path length alignment and review some OPEN ACCESSPhotonics 2014, 1 111 variants of SHD before outlining the future challenges of self-homodyne optical transmission and gaps in current knowledge.

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Joint Digital Signal Processing Receivers for Spatial Superchannels

Cited by 117 publications

References 8 publications

Single DPLL Joint Carrier Phase Compensation for Few-Mode Fiber Transmission

Single DPLL Joint Carrier Phase Compensation for Few-Mode Fiber Transmission

Review of Space-Division Multiplexing Technologies in Optical Communications

Self-Homodyne Detection in Optical Communication Systems

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