A Novel Equalizer for 112 Gb/s CAP-Based Data Transmission Over 150 m MMF Links

Dong, Xiaohe; Bamiedakis, N.; Cunningham, David; Penty, R.V.; White, I.H.

doi:10.1109/jlt.2019.2944076

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…MCEF was the modulation current efficiency factor, which was a rate factor consisting of 3-dB bandwidth f 3dB and square root of current I b -I th . At present, various beyond 100-Gbit/s MM-VCSEL-based short-reach transmission solutions have been reported [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. R. Puerta et al demonstrated 107.5-Gbit/s MultiCAP short-reach transmission over 10-m OM4 MMF [31].…”

Section: Vertical-cavity Surface-emitting Lasermentioning

confidence: 99%

Integrated Components and Solutions for High-Speed Short-Reach Data Transmission

Jiang

Yan

et al. 2021

Photonics

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According to different transmission distances, application scenarios of a data center mainly include intra- and inter-data center optical interconnects. The intra-data center optical interconnect is considered as a few kilometers optical interconnect between servers and racks inside a data center, which accounts for nearly 80% of data traffic of a data center. The other one, inter-data center optical interconnect, is mainly applied in tens of kilometers data transmission among different data centers. Since data exchange in data centers generally occurs between many servers and racks, and a lot of transmitter and receiver components are required, optical interconnects become highly sensitive to component costs. In this paper, we firstly review the development and applications of mainstream transmitter components (e.g., VCSEL, DML, EML, MZM, and monolithic integrated transmitter) and receiver components (e.g., single-end photodetector, Kramers–Kronig receiver, Stokes vector receiver, and monolithic integrated receiver), which have been widely applied in short-reach transmission systems. Then, two types of integrated solutions including simplified detection scheme and transceiver integration scheme are presented in detail. Finally, we summarize and discuss the technological and component options for different transmission distances. We believe that monolithic integrated components, especially transceiver integration, will become a powerful solution for next-generation high-speed short-reach transmission systems.

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Section: Vertical-cavity Surface-emitting Lasermentioning

confidence: 99%

Integrated Components and Solutions for High-Speed Short-Reach Data Transmission

Jiang

Yan

et al. 2021

Photonics

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“…as discrete multitone and carrier-less amplitude and phase modulation that also relax the VCSEL bandwidth are being investigated. 4,5 The transition from 50G PAM-4 to 100G PAM-4 did not require a doubling of VCSEL bandwidth. The longer transient response (in units of symbol period) of the 100G VCSEL is accommodated using a feed forward equalizer (FFE) of longer length (taps) in the receiver.…”

Section: Introductionmentioning

confidence: 99%

100G VCSELs for bidirectional multi-mode links

Murty

Wang

Dolfi

et al. 2023

Vertical-Cavity Surface-Emitting Lasers XXVII

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The entry of 100G 850 nm VCSELs enables the replacement of copper by multimode fiber in switch-toserver links, and facilitates the upgrade of switch-to-switch links in enterprise networks and data centers. This paper will present the key features and characteristics of multimode VCSELs that enable direct modulation at 100 Gb/s suitable for multimode Ethernet and Fibre Channel standards. Beyond 100G, a bidirectional link using VCSELs of two wavelengths is one potential solution to double the aggregate data rate on duplex fiber links. Elements of both 850 and 910 nm VCSELs that would enable the next generation data links are described.

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A New Equalizer Structure for High-Speed Optical Links Based on Carrierless Amplitude and Phase Modulation

Bamiedakis

Dong

Cunningham

et al. 2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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Spectral efficient modulation formats can enable the transmission of higher data rates than conventional on-off keying (OOK). Carrierless amplitude and phase modulation (CAP) is such an attractive modulation scheme that has been widely considered for use in different types of optical links. The scheme however can suffer from intersymbol interference (ISI) and channel crosstalk (CCI) when the frequency response of the channel is not ideal. Conventional equalizers based on feedforward (FFE) and decision feedback (DFE) equalizers are easy to implement in practice and can mitigate some of the induced ISI. However, they fail to suppress the induced CCI in the link as each channel is equalized independently. As a result, we have recently proposed the use of a new equalizer structure for use in CAP-based optical links to mitigate these transmission impairments. This new equalizer, named CAP equalizer, can be formed with conventional FFEs and DFEs with minimal additional complexity whilst providing significant performance advantages. In this paper therefore, we review the equalizer structure and report recent demonstrations of its use in short-reach optical links. We present experimental studies on a 112 Gb/s CAP-16 VCSEL-based OM4 MMF link and a 4 Gb/s CAP-16 LED-based POF link and compare the performance of the links when both a conventional FFE and DFE equalizer and the newly proposed CAP equalizer are used. The results clearly demonstrate that the CAP equalizer offers improved receiver sensitivity and enables successful data transmission over longer fibre reaches.

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A Novel Equalizer for 112 Gb/s CAP-Based Data Transmission Over 150 m MMF Links

Cited by 8 publications

References 17 publications

Integrated Components and Solutions for High-Speed Short-Reach Data Transmission

Integrated Components and Solutions for High-Speed Short-Reach Data Transmission

100G VCSELs for bidirectional multi-mode links

A New Equalizer Structure for High-Speed Optical Links Based on Carrierless Amplitude and Phase Modulation

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