A CMOS Wafer-Scale, Monolithically Integrated WDM Platform for TB/s Optical Interconnects

Li, Guoliang; Creazzo, Tim; Marchena, Elton; Yu, Peter T.; Krasulick, Stephen

doi:10.1364/ofc.2014.th1c.2

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…The laser wavelength is set by controlling the wavelength selective elements inside the external cavity. Significant progresses toward the realization of low cost hybrid lasers in silicon photonics have been shown in [15] [16] where the III-V integration is realized at wafer level without the need of an active alignment of each single light generator chip to the silicon substrate. These last developments indicate that a practical realization of low-cost, mass producible, high speed multi-channel DWDM transceivers for transmission up to 20 Km in silicon photonic platform is realistic.…”

Section: Enabling Photonic Technologiesmentioning

confidence: 99%

Future Proof Optical Network Infrastructure for 5G Transport

Iovanna¹,

Cavaliere²,

Testa³

et al. 2016

J. Opt. Commun. Netw.

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The telecommunication community has reached a broad consensus that current RAN and underlying transport will not be able to scale up to the traffic volume and quality expected in 5G. Thus, it is mandatory to remove all the technological bottlenecks and operational rigidities to ensure a painless migration from the existing radio scenario to the 5G one. This article presents a transport architecture able to serve as backhaul and fronthaul, to convey radio traffic on the same optical infrastructure. Cornerstones of the solution are: a novel photonic technology used to provide optical connectivity complemented with a dedicated agnostic framing; a deterministic switching module; a flexible control paradigm based on a layered scheme and on the slicing concept to facilitate optimal interaction of transport and radio resources while preserving a welldemarcated mutual independence. Simulations and experiments are presented to demonstrate the aforementioned features.

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Section: Enabling Photonic Technologiesmentioning

confidence: 99%

Future Proof Optical Network Infrastructure for 5G Transport

Iovanna¹,

Cavaliere²,

Testa³

et al. 2016

J. Opt. Commun. Netw.

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“…The first solution is a butt-coupling method between active devices and Si photonics chip, which are fabricated discretely. 20,21) In this method, high quality and reliable chips are available as long as coupling loss can be compensated. The second involves heteroepitaxial growth on a Si substrate.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient double-taper-type coupler between III–V/silicon-on-insulator hybrid device and silicon waveguide

Suzuki

Tachibana

Nagasaka

et al. 2018

Jpn. J. Appl. Phys.

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An optical mode converter between hybrid device and Si waveguide is the key component for efficient and stable operation of III–V/silicon-on-insulator (SOI) hybrid photonic integrated circuits (PICs). In this study, we introduced a double taper structure into such a mode converter and investigated the coupling efficiency dependence on their structural parameters. By using N2 plasma activated bonding technology, III–V/SOI double-taper-type mode couplers with various taper-tip-widths and taper lengths were fabricated, and their coupling efficiencies were evaluated. As the result, a coupling efficiency of as high as −0.2 dB was achieved for a double-taper device with a tip width of 0.4 µm and total length of 85 µm.

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“…A photonic integration technology allows for cost-effective realization of the ROADMs and transceivers [8]; in particular, silicon photonics are most suitable for large-scale integrated switching devices due to its characteristics of easy integration with control electronics, high miniaturization, mass producibility and low cost due to the use of a well-established Complementary Metal Oxide Semiconductor (CMOS) production infrastructure. Concerning integrated multiwavelength transceivers, relevant technological advances have been made with two different technological approaches that lead to InP monolithic-integrated DWDM transceivers and silicon photonics-based transceivers [18,19].…”

mentioning

confidence: 99%

Dimensioning Models of Optical WDM Rings in Xhaul Access Architectures for the Transport of Ethernet/CPRI Traffic

et al. 2018

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The Centralized Radio Access Network (C-RAN) provides a valid solution to overcome the problem of traditional RAN in scaling up to the needed processing resource and quality expected in 5G. The Common Public Rate Interface has been defined to transport traffic flows in C-RAN and recently some market solutions are available. Its disadvantage is to increase by at least 10 times the needed bandwidth and for this reason its introduction will be gradual and will coexist with traditional RAN solutions in which Ethernet traffic is carried towards the radio base stations. In this paper, we propose an Xhaul optical network architecture based on Optical Transport Network (OTN) and Dense Wavelength Division Multiplexing (DWDM) technologies. The network allows for a dynamic allocation of the bandwidth resources according to the current traffic demand. The network topology is composed of OTN/DWDM rings and the objective of the paper is to evaluate the best configuration (number of rings and number of wavelengths needed) to both to minimize the cost and to provide an implementable solution. We introduce an analytical model for the evaluation of the number of wavelengths needed in each optical ring and provide some results for 5G case studies. We show how, although the single ring configuration provides the least cost solution due to the high statistical multiplexing advantage, it is not implementable because it needs switching apparatus with a too high number of ports. For this reason, more than one ring is needed and its value depends on several parameters as the offered traffic, the number of Radio Remote Units (RRU), the percentage of business sub-area and so on. Finally, the analytical model allows us to evaluate the advantages of the proposed dynamic resource allocation solution with respect to the static one in which the network is provided with a number of wavelengths determined in the scenario in which the radio station works at full load. The bandwidth saving can be in the order of 90% in a 5G traffic scenario.

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A CMOS Wafer-Scale, Monolithically Integrated WDM Platform for TB/s Optical Interconnects

Cited by 7 publications

References 7 publications

Future Proof Optical Network Infrastructure for 5G Transport

Future Proof Optical Network Infrastructure for 5G Transport

Highly efficient double-taper-type coupler between III–V/silicon-on-insulator hybrid device and silicon waveguide

Dimensioning Models of Optical WDM Rings in Xhaul Access Architectures for the Transport of Ethernet/CPRI Traffic

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