9.6 Tbit/s DWDM equipment's been created A 100 Gbit/s signal has been transmitted for a distance of 4,250 km

Hybrid amplifier EDFA + RAMAN

Combination of Raman and erbium-doped fiber amplifier in one case

  • EDFA + RAMAN in one case
  • High spectral flatness
  • Low noise figure

Hybrid amplifier is a combination of Raman amplifier and erbium-doped fiber amplifier (EDFA). Raman pumping with the power of up to 600 mW amplifies the emission in the line before its input to EDFA and decrease an effective noise factor of the amplifier. Due to lower noise factor it is possible to achieve larger distances between amplifiers and decrease network operating costs. Inter-stage access for connection of dispersion compensators can be optionally provided.