'Super Raman' pumping boosts system margins by 2.5dB

MPB Communications has recently filed a patent that reveals a novel method of multiple-order cascaded Raman pumping.

The Montreal, Canada-based company says it has proven that increasing the order of pumping decreases the amount of noise power delivered to the receiver.

This is due to the fact that the Raman gain occurs at a greater distance from the receiving terminal.

The improved optical signal-to-noise-ratio (OSNR) achieved by pumping with this method allows the SuperRaman to enhance fibre-optic system margins by as much as 2.5dB over the conventional first-order pumping architecture widely available on the market.

In addition to the advantage of noise improvement, this laser can be used for pumping all fibre types and is ideal for easily upgrading the bit-rate, number of channels, or reach of existing link systems.

MPB's (US) patent number 6,480,326 covers the technology behind the company's SuperRaman fibre laser for distributed Raman amplification.

The company believes that holding rights to this design strengthens its position in the telecommunications sector.

For more information about MPB Communications, visit: www.mpbcommunications.com

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