Industrial Automation Magazine India

Furukawa Electric develops new pump source FRSi4XX Series

Published on : Wednesday 11-03-2020

The new pump for forward Raman amplifiers achieves higher speeds and long-distance transmission.

 

San Diego, March 9, 2020 – Furukawa Electric Co Ltd (FEC) has developed FRSi4XX Series pump sources for forward Raman amplifiers that extend transmission distances in ultrahigh-speed optical fibre communications farther than conventional systems.

Proliferation of smartphones has led to a dramatic increase in communication traffic, including the expansion of wireless backbones, cloud computing, video streaming, and the penetration of social networks. To deal with this traffic explosion, improvement in optical signal-to-noise ratio (OSNR) is becoming an important factor in soon-to-be-deployed ultrahigh-speed optical fibre communications such as 400 Gbps and beyond.  Existing erbium-doped fibre amplifiers (EDFA), which are widely used in current systems, do not have sufficient OSNR performance. Demand is increasing for Raman amplifiers due to their excellent noise characteristics. Forward Raman amplifiers, which make the most of the advantages of Raman amplification, are expected to be a technology necessary for increasing transmission distances.

In the past, only the backward Raman amplifier was used due to limitations of the noise characteristics of the pump source. Furukawa Electric's new FRSi4XX Series novel pump sources make it possible to realize forward Raman amplifiers and feature high output as well as excellent low-noise characteristics.

The important characteristics of these products are high power output and low noise.  Furukawa Electric achieved these characteristics by leveraging the design, manufacturing technology and high-precision packaging of its InP (Indium Phosphide) optical semiconductor chip. The result is a pump source with a high-output chip structure and high-efficiency coupling technology. The optical output of 100 mW or more was achieved through an optimized heat dissipation design.

The FRSi4XX pump series reduces noise by about 20 dB/Hz compared with conventional pump sources for Raman amplifiers.

Combining the FRSi4XX Series with existing FOL1439 Series, yield pump sources especially well-suited to forward pumping Raman amplifiers.

As demand for ultrahigh-speed optical fibre communications continues to grow, FEC will further enhance the technology of this series and contribute to the construction of information and communications infrastructure in anticipation of the advancement of 5G. Sample shipments of the FRSi4XX Series are scheduled to begin in the second half of FY2020.