Technology

Prysmian manufactures monster submarine cable for Superloop

Prysmian Group, the energy and telecom cable specialist, has delivered what it claims is the densest and highest fibre count underwater optical cable ever made.

An underwater FlexTube cable containing 1,728 optical fibres has now been successfully deployed by the Australian telecom provider Superloop for its TKO Express project, to provide internet connectivity between the areas of Siu Sai Wan on Hong Kong Island and the data centre hub of Tseung Kwan O (TKO) Industrial Estate on the mainland.

‘Li-Fi’ offers secure alternative for wireless company networks

Fibre-optics without wires is becoming reality. At OFC 2017, the Dresden Fraunhofer Institute for Photonic Microsystems (IPMS) will demonstrate a prototype Li-Fi communications module that uses infrared light to transmit data over company networks.

Originally envisaged as light bulbs that could also act as wireless routers, Li-Fi technology can deliver signals over distances of up to 10m and at speeds of one gigabit per second or more.

Transceiver noise limits optical system capacity, research finds

Why do lab results never live up to simulations when determining the capacity of optical fibre? That’s the question asked by Dr Lidia Galdino from University College London’s department of Electronic and Electrical Engineering. She was surprised to discover that the transceivers used to transmit and receive optical signals have more of an impact on system performance than previously thought.

Viavi supplies 400G testers to cross-section of optical networking ecosystem

Test and measurement specialist Viavi Solutions reports that it has sold its ONT-600 400G tester to companies representing a cross-section of the high-speed optical networking ecosystem, demonstrating the momentum in this emerging yet rapidly growing market.

Customers range from chip, module and network equipment manufacturers, to a Tier-1 US telecommunications carrier offering wireless, wireline and converged services.

‘BICSEL’ promises faster computing and telecom links

Researchers at the University of California San Diego have demonstrated a new type of laser that has the potential to be more compact and energy efficient than the standard vertical-cavity surface emitting lasers used in many computing and optical networking links.

The new laser is based on an unconventional physics phenomenon called ‘bound states in the continuum’ (BIC), which are resonant states. First proposed as part of quantum mechanics theory in 1929, only recently was it realised that BICs are a general wave phenomenon that could also be applied to optics.

UK researchers probe limits of coherent optical transmission

Researchers from University College London in the UK have calculated that optical systems should be capable of providing transmission capacities of up to 223Tb/s over transoceanic distances using the installed base of standard singlemode fibre – almost ten times greater capacity than systems commercially available today.

FSAN unveils roadmap to future PON standards

While service providers are still evaluating the latest generation of passive optical network technologies, the Full Service Access Network Group (FSAN) is already considering what comes next for optical fibre based access systems.

At a meeting held recently in Hangzhou, China, on 14–18 November the group received contributions from operators about their requirements and technology options for such systems, and issued an updated roadmap that has recently been agreed by the operator members.

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