Test and measurement

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Fibre characterisation in the coherent era

Fibre characterisation has been a part of my career since I joined York Technology in 1983. York had developed the FCm 1000, the first automatic fibre characterisation machine. This mighty machine could measure all of the fibre’s critical parameters, including end face geometry, mode field diameter and refractive index profile, as well as perform optical time-domain reflectometer (OTDR) testing, spectral attenuation measurements and, for multimode fibres, find the modal dispersion.

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Testing times

As data rates increase across fibre networks, optical loss budgets are being driven down - attenuation through the system must be lower than ever because there is less tolerance for overall loss of light.

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Oleg Khaykin, CEO of Viavi Solutions, speaks candidly to Fibre Systems about how to compete in the challenging world of communications test and measurement

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Hao Dong describes how innovative optical fibres and cabling could provide substantial benefits for connecting data centres across a wide range of distances

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Collaborative initiatives are seeking to bridge the gap between small- and large-scale production of photonic integrated circuits, finds Andy Extance

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Optical networks are playing an increasingly important role in the distribution of precise timing signals and synchronisation with sub-microsecond accuracy. Michael Ritter explains