Lumenisity® first with hollow-core fibre for 10Gbit DWDM over 10km

Created September 30, 2020
Technologies and Products

Cable maker Lumenisity® Limited, has announced the introduction of its hollow-core CoreSmart™ fibre cable solutions for DWDM operation over links in excess of 10km.

Lumenisity’s CoreSmart hollow-core cable uses a unique nested anti-resonant nodeless fibre (NANF™) patented technology. The previous generation of hollow-core design, photonic bandgap fibre (PBGF), is inherently multi-moded and requires complex solutions to reduce the impact of parasitic modes on the hollow-core performance. Lumenisity’s CoreSmart NANF is robustly single moded, which provides continuous uninterrupted simultaneous single mode transmission at 1310nm, as well as over the full C and L bands and beyond. The advanced NANF technology offers the promise of realising loss values at, or better than, conventional solid silica core fibres.

Lumensity says the CoreSmart hollow-core cable that is being deployed today has losses of ~2dB/km over a wide temperature range – the lowest loss deployable hollow-core cable commercially available to date.

Lumenisity’s CoreSmart cable technology is designed to be backward compatible with existing networks and systems equipment. It can be spliced directly in the field by accredited installers with commercially available splicers, using Lumenisity’s proprietary patent pending hollow-core to conventional fibre adapter technology.

The cable technology has been ruggedly tested and proven in challenging environments. The company with its customers and partners has deployed multiple cables globally, which are carrying live production traffic in the field, with some carrying traffic for over three years. Today sees this capability extended to 10km links with full broadband DWDM capability at 10Gbit per channel. Segment lengths vary with application, but due to Lumenisity’s cable design and proprietary field splice technology, the product has been proven to meet carrier grade telecommunication error rate requirements with  resilience, even with 10 concatenated segments. Cables are being evaluated for much higher data rates over the coming months.

Mike Fake, the company’s director responsible for Product Management said: “This is the first of several announcements where we will be exploiting our patented and ground breaking NANF technology to extend reach and bandwidth for our customers. We are proud to be leading the field in bringing deployable hollow-core fibre technology to market with performance that can lead to real advantages for our customers in a variety of network applications.”

Marcus Washco, Global Head of Networks for Jump Trading, an early user of the technology commented: “The cables we have deployed from Lumenisity have exceeded our performance expectations. We selected Lumenisity as the best in class performing cable we are aware of and an impressive near term roadmap.”

Hollow-core fibres, where light propagates in an air containing core formed by microscopic capillaries, are long recognised as the next stage of advancement in fibre optic cable technology. They have many advantages over conventional solid glass fibres. Data travels 50% faster in hollow-core fibre as the light propagates in air and offers the potential for higher data capacity and extended reach due to the 1000x reduction in power induced non-linear effects. A key challenge has been both the design and manufacturing processes. In particular, for making fibres and to develop the cable and processes for seamless in-field installation in existing and green field networks.

A major breakthrough in hollow fibre technology was announced at ECOC 2019 by the University of Southampton’s Optoelectronic Research Centre (ORC), based in the Zepler Institute of Photonics and Nanoelectronics (UK).

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This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.