Degenerate Mode-Group Division Multiplexing

Carpenter, Joel; Thomsen, Benn C.; Wilkinson, Timothy D.

doi:10.1109/jlt.2012.2206562

Cited by 136 publications

(84 citation statements)

References 24 publications

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“…An elegant approach that has attracted significant attention is mode division multiplexing (MDM) [19], realized by combining or separating modes at the multiplexer and demultiplexer for transmitting independent data streams. Recent MDM demonstrations employ spatial light modulators [5,21,22], fiber gratings [23][24][25][26][27][28], digital signal processing algorithms [29][30][31], modal decomposition algorithms [32][33][34], adaptive optics [7,[35][36][37][38] and photonic crystal fiber [39].…”

Section: Introductionmentioning

confidence: 99%

5 × 5 25 Gbit/s WDM-MDM

Fazea

Amphawan²

2015

Journal of Optical Communications

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Wavelength-division multiplexed-passive optical network (WDM-PON) is a revolutionary high-capacity and scalable broadband access network. This paper capitalizes on Laguerre-Gaussian (LG) modes to reduce modal dispersion and increase data capacity. A data rate of 25 Gbit/s is attained for a multimode fiber link by multiplexing five LG modes on five wavelengths centered at 1,550.12 nm for a distance up to 800 m.

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Section: Introductionmentioning

confidence: 99%

5 × 5 25 Gbit/s WDM-MDM

Fazea

Amphawan²

2015

Journal of Optical Communications

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“…A key component of MDM is the excitation of specific waveguide mode in a MMF. In existing literature, this task can be accomplished using multiple techniques, such as stress fiber [6], spot-based coupler or spatial beam sampler [7,8], photonic lanterns [9][10][11], phase masks [12,13] or spatial light modulators (SLM) [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…For example, the phase mask approaches described in [12,13] are static in nature and cannot be easily adjusted in real time. Other research groups have utilized SLM to achieve selective mode excitation [14][15][16][17][18]. However, the method described here is different from existing approaches in [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Other research groups have utilized SLM to achieve selective mode excitation [14][15][16][17][18]. However, the method described here is different from existing approaches in [14][15][16][17][18]. Specifically, our adaptive optics (AO) based approach requires no prior knowledge of the optical system or the intermodal coupling within the fiber network.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, our method treats the entire optical system, including both the input coupling system and the few-mode fiber (FMF) itself, as a "black box". In contrast, the method reported in [15][16][17] requires knowledge of the optical system and is based on linking optical near field to far field through a Fourier transform [15]. Furthermore, the method in [15][16][17] is implemented using computer generated holography, which is both computationally intensive and time consuming.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adaptive control of waveguide modes in a two-mode-fiber

Lü¹,

Shipton²,

Wang³

et al. 2014

Opt. Express

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We experimentally demonstrate an adaptive-optics-based approach that allows selective excitation of waveguide modes and their mixtures in a two-mode fiber (TMF). A phase-only spatial light modulator is used for wavefront control, using feedback signals provided by the correlation between the experimentally measured field distribution and the desired mode profiles. Experimental results show the optical field within the TMF can be shaped to be pure linearly polarized (LP) modes or their combinations. Analysis shows selective mode excitation can be achieved using only 5 × 5 independent phase blocks. With proper feedback signals, this method should enable one to precisely control the optical field within any multimode fiber or other types of waveguides in real time.

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Comparison of principal modes and spatial eigenmodes in multimode optical fibre

Carpenter

Eggleton

Schröder

2016

Laser & Photonics Reviews

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Optical waveguide theory is an established part of optical physics. Yet only recently have fundamental phenomena such as spatial eigenmodes and principal modes been demonstrated experimentally. This work leverages recently developed techniques enabling detailed spatiotemporal characterisation of multimode fibre to provide new insights into the fundamentals of fibre propagation. This paper presents detailed analysis of all 420 of a fibre's principal modes and spatial eigenmodes and compares the similarity and differences between these two phenomena. It was found that even over very short lengths, the principal modes can not only significantly suppress modal dispersion but are also a more physically meaningful basis than spatial eigenmodes.

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Degenerate Mode-Group Division Multiplexing

Cited by 136 publications

References 24 publications

5 × 5 25 Gbit/s WDM-MDM

5 × 5 25 Gbit/s WDM-MDM

Adaptive control of waveguide modes in a two-mode-fiber

Comparison of principal modes and spatial eigenmodes in multimode optical fibre

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