Perspective on mode-division multiplexing

Su, Yikai; He, Yu; Chen, Haoshuo; Li, Xiaoying; Li, Guifang

doi:10.1063/5.0046071

Cited by 71 publications

(15 citation statements)

References 81 publications

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“…Various kinds of mul-timode manipulating and processing devices have been springing up, such as mode multiplexers/demultiplexers 5,6 , mode converters [7][8][9] , and mode switches 10 . Due to the lack of devices that simultaneously integrate the functions of mode demultiplexing and spectral measurement, the sophisticated photo-detecting circuits are usually required when extracting the wavelength-dependent information carried on independent modes 11,12 . Moreover, to the best of our knowledge, none of related works consider high-order modes as individual channels to directly recognize multiple spectra from separated sources.…”

Section: Introductionmentioning

confidence: 99%

Towards integrated mode-division demultiplexing spectrometer by deep learning

Zheng¹,

Zhu²,

Chen³

et al. 2022

OES

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Miniaturized spectrometers have been widely researched in recent years, but few studies are conducted with on-chip multimode schemes for mode-division multiplexing (MDM) systems. Here we propose an ultracompact mode-division demultiplexing spectrometer that includes branched waveguide structures and graphene-based photodetectors, which realizes simultaneously spectral dispersing and light fields detecting. In the bandwidth of 1500-1600 nm, the designed spectrometer achieves the single-mode spectral resolution of 7 nm for each mode of TE 1 -TE 4 by Tikhonov regularization optimization. Empowered by deep learning algorithms, the 15-nm resolution of parallel reconstruction for TE 1 -TE 4 is achieved by a single-shot measurement. Moreover, by stacking the multimode response in TE 1 -TE 4 to the single spectra, the 3-nm spectral resolution is realized. This design reveals an effective solution for on-chip MDM spectroscopy, and may find applications in multimode sensing, interconnecting and processing.

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Section: Introductionmentioning

confidence: 99%

Towards integrated mode-division demultiplexing spectrometer by deep learning

Zheng¹,

Zhu²,

Chen³

et al. 2022

OES

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“…In optical fiber communications, SDM can be implemented in different ways [8]: for instance, independent information can be transmitted in the different modes of a multi-mode fiber [9]. Alternatively, a fiber with multiple cores can be employed to transmit different signals in independent cores [10] or over multiple cores simultaneously in the so-called supermodes [11].…”

Section: Introductionmentioning

confidence: 99%

Compensation of crosstalk in optical spatial division multiplexing systems employing multiple-input and multiple-output processing

Zanitti¹,

Benedito²,

Penchel³

et al. 2022

Anais Do XL Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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The development of digital coherent optical communication technology has boosted the system capacity close to the nonlinear Shannon limit imposed by the combination of additive noise and nonlinear distortion. In this context, spatial division multiplexing (SDM) has emerged as a promising solution to overcome such a capacity limit. SDM systems, however, are affected by the channel-dependent loss as well as by interchannel crosstalk. In this paper, we obtain analytical expressions for the system capacity in presence of both impairments, showing that when multiple-input-and-multiple-output processing is implemented on the receiver side, the crosstalk can be compensated.

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“…The spatial degree of freedom of light beams is attractive both in classical communications and in quantum communications, since it is relatively resilient to noise and unbounded in dimensionality . A set of orthogonal spatial modes, based for example on either Laguerre–Gaussian or Hermite–Gaussian (HG) modes, can be used as carriers of information to increase the capacity of classical communications systems by space division multiplexing − or as an alphabet for secure quantum communication applications. , These systems rely on the ability to sort the different beams at the input and output ports. Beam sorting has been developed for free-space systems, − waveguide-integrated configurations, − and fiber communication systems, but the requirement to process and transmit signals at the chip level necessitates extending these sorting capabilities to planar integrated optical devices .…”

mentioning

confidence: 99%