Recent Progress in Space-Division Multiplexed Transmission Technologies

Morioka, Toshio

doi:10.1364/ofc.2013.ow4f.2

Cited by 12 publications

(3 citation statements)

References 51 publications

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“…Commonly used multiplexing techniques in optical fiber communication today include spacedivision multiplexing (SDM) or spatial multiplexing, wavelength-division multiplexing (WDM) using disjoint frequency bins, orthogonal frequency division multiplexing (OFDM) or coherent WDM (CoWDM) using spectrally overlapping yet orthogonal subcarriers, and polarization-division multiplexing (PDM) using both orthogonal polarizations supported by a single-mode fiber for independent bit streams 1,3 . Among these approaches, SDM has recently drawn sufficient attention as the space dimension is still not fully developed 4,5 , particularly with free-space optical (FSO) communication systems.…”

Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Weng

Vuong

2021

Preprint

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With free space optical (FSO) communication systems, information is generally transmitted to minimize diffraction. Here, we demonstrate an alternate paradigm, "diffractal space-division multiplexing" (DSDM), in which the diffraction of fractals enable a wider cone for reception to support roaming transceiver. As a result, DSDM is robust to misalignment over longer-distance links. We examine the consequence of mid-field, non-far-field propagation and the result on kernel bit error rates. The sparse and redundant encoding of information in DSDM may be relevant to other FSO acquisition, pointing, and tracking.

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Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Weng

Vuong

2021

Preprint

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“…12,13 Commonly used multiplexing techniques in optical fiber communication today include space-division multiplexing (SDM) or spatial multiplexing, wavelength-division multiplexing (WDM) using disjoint frequency bins, orthogonal frequency division multiplexing (OFDM) or coherent WDM (CoWDM) using spectrally overlapping yet orthogonal subcarriers, and polarization-division multiplexing (PDM) using both orthogonal polarizations supported by a single-mode fiber for independent bit streams. 12,14 Among these approaches, spatial multiplexing has recently drawn significant interest, as the technology is still under development, 15,16 particularly with FSO systems.…”

Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for Free Space Optical Communication

Weng¹,

Vuong²

2021

Preprint

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With free space optical (FSO) systems, information is generally transmitted to minimize diffraction. Here, we demonstrate an alternate paradigm in which multiple spatial bit streams are diffraction-encoded, an approach that enables a wider cone for reception and is especially robust to noise. We leverage the fact that diffracted fractal patterns or diffractals redundantly encode information over large areas as they propagate to the far field. This scheme enables a roving receiver to capture multiple spatial bits simultaneously when sampling a portion of the far-field beam. Our numerical FSO studies with and without atmospheric turbulence are a basis for new design considerations governing roaming area, beam divergence, and proper diffraction encoding. Concepts related to the sparse complexity of fractal, diffracted patterns show promise for diffractal space division multiplexing and may also be applied to channel marking, sensing, imaging, and other FSO systems.

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“…Fiber optic-based space division multiplexing (SDM), which includes mode division multiplexing (MDM), has recently received increasing attention for its application in optical networks [1][2][3]. It is a promising technique to increase fiber link throughputs and overcome the capacity limitations of standard single-mode fiber (SMF) introduced by the Kerr nonlinear effect and enable the implementation of optical multiple-input multiple-output (MIMO) systems [4,5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of optical fiber-based LP_01 ↔ LP_02 mode converters for the O-, S-, and C-Band

2015

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This paper proposes a double fiber taper-based mode converter that converts LP(01) to LP(02) and vice versa. The first taper is used to convert LP(01) to some higher order LP(0m) (m>1) modes while the second taper suppresses the undesired higher order modes (m>2) and results in LP(02) overwhelmingly dominated. A simulation shows that conversion efficiency of almost 100% at the central wavelength of O-, S-, and C-Band, and above 98% over the S- and C-Band was achieved. Moreover, suppression of undesired higher order modes is more than 10 dB over the whole O-, S-, and C-Band. In particular, the suppression is more than 19 dB for the whole C-Band. The analysis also shows that the performance of the mode converter is not sensitive to slight variations of the converter's parameters. The same converter also can be used to convert LP(02) back to LP(01). It is shown that conversion efficiency higher than 99% and suppression of undesired higher order modes higher than 30 dB can be obtained. Further, a (de)multiplexer for an LP(02) and an LP(01) mode was designed using the mode converter combined with a symmetric directional coupler. The multiplexer is broadband and has an insertion loss less than 0.5 dB in the C-Band.

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Recent Progress in Space-Division Multiplexed Transmission Technologies

Abstract: Recent development of transmission technologies based on space-division multiplexing is described with future perspectives including a recent achievement of one Pb/s transmission in a single strand of fiber.

Cited by 12 publications

References 51 publications

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Fractal, Diffraction-encoded Space-Division Multiplexing for Free Space Optical Communication

Analysis of optical fiber-based LP_01 ↔ LP_02 mode converters for the O-, S-, and C-Band

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