Proximion demos DCM models at OFC

FEBRUARY 26, 2008 -- Proximion Fiber Systems AB (search for Proximion), provider of fiber Bragg grating (FBG)-based dispersion compensation modules (search for DCM), will be demonstrating its 40-Gbit/sec DCM-CB (continuous band) and DCM-ITU devices at OFC this week in San Diego, CA.

The DCM-CB covers the full continuous C-band and enables any channel plan, any bit rate, and any modulation format. The company says it increases performance and efficiency, making it suitable for transmission over mission-critical networks.

DCM-ITU is a cost-effective, small-form-factor dispersion compensation device. Unlike competing alternatives, the DCM-ITU's wider bandwidth has low group delay ripple (GDR). Suitable for cascaded applications, DCM-ITU operates in 40-Gbit/sec as well as 10-Gbit/sec formats and over the entire C-band. DCM-ITU is suited for metropolitan and regional networks.

The DCM-CB supports any channel plan and provides a small form factor compared to incumbent dispersion compensation technologies. It primarily addresses next-generation DWDM systems with increased transmission capacity, which the company says will benefit from the flexibility in channel spacing offered by the full C-band coverage.

Proprietary fiber Bragg grating (FBG) manufacturing technology allows Proximion to produces high-performance DCMs with no nonlinear effects, no latency, and a very low signal and power loss compared to the alternative -- traditional dispersion compensating fibers (DCFs).

"We are experiencing a paradigm shift where the system vendors are not only preparing for 40 Gbits/sec at 50-GHz channel spacing, but also applying new approaches when designing systems," says Bengt Johansson, chief technology officer at Proximion Fiber Systems AB. "Today's market is moving to 40-Gbit/sec systems and is looking for cost-effective solutions, such as the DCM-CB which contributes to lowering system cost."

"The DCM�ITU is perfect for those customers that do not need 50-GHz channel spacing but still want to run 10-Gbit/sec and 40-Gbit/sec systems in a cost-effective way," says Stefan Ekman, chief executive officer. "The importance of dispersion management is increasing in all parts of the network."

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