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Aelis Photonics claims optical compensation breakthrough

Posted: 31 Mar 2003 ?? ?Print Version ?Bookmark and Share

Keywords:aelis photonics? optical equalization technology? fiber-filter method? dsp processor? ReachExtender?

Aelis Photonics Inc., a startup based in Netanya, Israel, is slowly taking the wraps off an optical equalization technology which the company claims can mitigate three separate sources of phase distortion - chromatic dispersion, polarization-mode dispersion, and self-phase modulation.

While the company is not revealing full details of its methods to reduce inter-symbol interference, Aelis claimed the new fiber-filter method should show significant advantages over dispersion compensation based on DSP processors in the electronic domain.

Several companies have introduced solutions based on the DSP-based, dispersion-compensation approach recent months.

The equalizer, called ReachExtender, is based on a linear filter implemented between a fiber output and a photo-detector. Menachem Tipris, CEO at Aelis, said the method could be implemented in a subsystem of relatively low cost and complexity. It also will show bit-error rates much better than any electronic equalization, by several decibels or even tens of decibels, Tipris predicted.

The method could even be implemented in several different versions, with the first version being all-fiber-based, followed by possible planar circuits or other means of implementing the filter.

Aelis is not yet providing timelines for availability of ReachExtender, though the company said it has decided on initial form factors for how its equalizers will be introduced.

- Loring Wirbel

EE Times

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