RED-C intros Hybrid Raman-EDFA module for coherent networks

SEPTEMBER 13 2010 -- RED-C Optical Networks Ltd has launched its new Hybrid Raman-EDFA module for 100/40-Gbps coherent networks.

The Hybrid module consists of a counter-propagating Raman pump unit tightly integrated with a variable gain EDFA. The unit provides an exceptionally low noise figure and excellent gain flatness, says RED-C, which will help enable ultra-long haul and high bit-rate systems. The combination of low noise figure(1.5-3 dB) and gain flatness (<0.7 dB pk-pk) allows the link reach to be at least doubled in comparison to systems based on traditional EDFAs, RED-C asserts.

The optimization and tight integration of the Raman pump unit and the variable gain EDFA in a single module enables improved performance compared to using two separate modules, in addition to the cost and space savings achieved by combining the two units together, RED-C says. Furthermore, the integrated Hybrid control circuitry operates in advanced AGC mode so that the combined Raman and EDFA gain is accurately controlled, including fast transient suppression, the company continues. This is achieved by measuring the actual Raman gain in real time and adjusting the EDFA gain accordingly.

The module operation and interface are similar to those of a traditional variable gain EDFA, and therefore requires no special system adaptations, according to RED-C. The module also incorporates laser safety mechanisms to ensure that both the Hybrid Raman-EDFA module itself and the network in which it is installed can be classified as Class 1M products with respect to laser safety.

Visit RED-C Optical Networks