Teraxion Launches DWDM Filters

Fiber Bragg Gratings target 10 and 40 Gbit/s systems

July 4, 2001

1 Min Read

QUEBEC CITY -- TeraXion (www.teraxion.com), a manufacturer of value-added optical components, is proud to present its new line of low dispersion 50 GHz and 100 GHz DWDM filters, perfectly suited for transmission speed from 10 to 40 Gb/s.

Fiber Bragg Gratings (FBGs) based filters have been recognized for years for their flat-top response, steep spectral roll-off and excellent adjacent channel isolation. They are intensively used in optical add-drop modules and in DWDM multiplexers and demultiplexers. However, the intrinsic chromatic dispersion of FBGs limited their usage to lower bit rates. “The challenge was to eliminate dispersion in our filters while maintaining other optical performances” said Erick Pelletier, Director of Product Management. “A close relationship with our customers developing their next generation of 10 and 40 Gb/s systems was the key for bringing a product directly in line with the new market requirements.”

As transmission bit rates and distance increase, dispersion management in optical components becomes increasingly important. TeraXion’s new TF-WDM-LD DWDM filters will enable high performance DWDM system deployments as they are designed to minimize group delay variation inside and outside their passband. Minimizing the group delay variation reduces both the level and variation of chromatic dispersion introduced by the filter to the selected channel as well as to the adjacent and non-adjacent express channels. At 40 Gb/s, the total group delay variation must be well below 10 ps.


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