Autumn 2019 - Optical Connections Magazine


Researchers turn off backscattering, aim to improve optical data transmission

OIF launches higher baud rate coherent driver modulator and low-rate service multiplexing projects

At this year’s Optical Interworking Forum’s

this project is the next generation of the High Bandwidth Coherent Driver Modulator (HB-CDM) Implementation Agreement published in 2018. The second project start is for a white paper on low- rate service multiplexing using FlexE and 400ZR aimed at eliminating ambiguity and providing clarification on how 400ZR should be leveraged in multiplexing applications. Various network operators are looking for a multiplexing scheme to support lower-rate Ethernet clients (e.g. 4x100GE) into a 400ZR coherent line. This technical white paper will educate the market on how FlexE can be used to aggregate low-rate Ethernet services (e.g. 4x100GE) into 400ZR interfaces.

(OIF) 3Q19 Technical and MA&E committees meeting in Montreal, Canada, the organisation announced the launch of two new projects; a higher baud rate coherent driver modulator and a white paper detailing low-rate service multiplexing using FlexE and 400ZR. The Higher Baud Rate Coherent Driver Modulator project will define a new version of the coherent driver modulator supporting at least 96 Gbaud for the low modem implementation penalty segment of the coherent market for single optical carrier line rates beyond 400 Gbps. Designed for higher data rates and longer reach and optimised for performance,

Engineers at the University of Illinois have found a way to redirect misfit light waves to reduce energy loss during optical data transmission. In a study, researchers exploited an interaction between light and sound waves to suppress the scattering of light from material defects – which could lead to improved fibre optic communication. Their findings are published in the OSA journal Optica. Some previous studies have shown that undesirable backscattering

properties. However, these are not viable options for today’s optical systems that use transparent, nonmagnetic materials like silicon or silica glass. Trying the experiment in fibre optic cable will be the next step in showing that this phenomenon is possible at the bandwidths required in optical fibre communications. Light waves scatter when they encounter obstacles, be it a crack in a window or a tiny flaw in a fibre optic cable. Much of that light scatters out of the system, but some of it scatters back toward the source in a phenomenon called backscattering.

can be suppressed in special materials that have certain magnetic



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ISSUE 18 | Q3 2019

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