Summer 2018 Optical Connections Magazine

“When it comes to getting the most out of optical networks the future is now being etched by software.”


Anthony Savvas – see page 22

Graphene paves the way to faster high-speed optical communications

Graphene Flagship researchers created a technology that could lead to new devices for faster ultra-broadband transfers. For the first time, researchers have demonstrated how electrical fields boost non-linear optical eects of graphene. The research, carried out by a team of Graphene Flagship partners was led by the Cambridge Graphene Centre at the University of Cambridge. Graphene, among other materials, can capture photons, combine them, and produce a more powerful optical beam. This is due to a physical phenomenon known as the optical harmonic generation, which is characteristic of nonlinear materials. Nonlinear optical eects can be exploited in a variety of applications, including laser technology, material processing and telecommunications. Including high-speed fibre- optic communications, 3D sensing and materials processing. Veeco Instruments has announced that LumentumHoldings has ordered the Veeco K475i Arsenide/Phosphide Metal Organic Chemical Vapor Deposition system for production of its advanced semiconductor components, which address the 3D sensing, high-speed fiber-optic communications and laser-based materials processing end-markets. “The global communications, industrial and consumer electronics markets that our proprietary semiconductor lasers address are growing rapidly,” said Susan Wang, vice

Technology Ocer of the Graphene Flagship, and Chair of its Management Panel, added how “graphene never ceases to surprise us when it comes to optics and photonics.” He also highlights that “the Graphene Flagship has put significant investment to study and exploit the optical properties of graphene. This collaborative work could lead to optical devices working on a range

‘Eciency boosted tenfold’ “Our work shows that the third harmonic generation eciency in graphene can be increased by over 10 times by tuning an applied electric paper and researcher at the Cambridge Graphene Centre (University of Cambridge, UK). “The authors found again something unique about graphene: tuneability of THG over a broad wavelength range. As more and more applications are all-optical, this work paves the way to a multitude of technologies,” said ICREA Professor Frank Koppens from ICFO (The Institute of Photonic Sciences), Barcelona, Spain, field,” explains Giancarlo Soavi, lead author of the

Although all materials should present this behaviour, the eciency of this process is typically small and cannot be controlled externally. Now, partners of the Graphene Flagship project in Cambridge, UK, Milan, and Genova, Italy, have demonstrated for the first time that graphene not only shows a good optical response, but also how to control the strength of this eect using an electric field. Researches envision the creation of new graphene optical switches, which could also harness new optical frequencies to transmit data along optical cables, increasing the amount of data that can be transmitted. Currently, most commercial

of frequencies broader than ever before, thus

enabling a larger volume of information to be processed or transmitted.”

who is the leader of the Photonics and Optoelectronics Work Package within the Graphene Flagship. Professor Andrea C. Ferrari, Science and

devices using nonlinear optics are only used in spectroscopy. Graphene

could pave the way towards the fabrication of new devices for ultra-broad bandwidth applications.

Lumentum selects Veeco MOCVD system for next-gen comms applications

general manager of MOCVD Operations at Veeco. “As customers look for technologies that enable demanding new applications in increasingly competitive markets, many leading photonics, power electronics and LED device manufacturers continue to choose our proven MOCVD systems that deliver strong wafer uniformity and the lowest cost of ownership.”

reducing cost-per-wafer by up to 20 percent compared to alternative systems through higher productivity, best-in-class yields and lower operating expenses. Application areas include lighting, solar, laser diodes, vertical-cavity surface-emitting lasers, pseudomorphic high electron mobility transistors and heterojunction bipolar transistors. “A leading player in the optical communications and commercial laser markets, Lumentum is well positioned to capitalize on the growing demand for next-generation laser and optical devices using Veeco MOCVD technology,” said Peo Hansson, PhD, senior VP and

president of manufacturing at Lumentum. ‘Exceptional performance’ “We chose Veeco’s K475i system with its high capacity and throughput, uniformity of quality, repeatability and exceptional performance to help expand our capacity and better address these growth opportunities. We have a longstanding relationship with Veeco and look forward to future collaboration together.” The K475i system incorporates proprietary TurboDisc and Uniform FlowFlange MOCVD technologies. These innovations allow Veeco customers to improve compositional uniformity and dopant control while


ISSUE 13 | Q2 2018

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