Hybrid amplifier EDFA + RAMAN
Combination of Raman and erbium-doped fiber amplifier in one case
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.
| Parameter ROADM | RA | EA |
| Spectral range | 1528,7–1567,1 nm | |
| Output power | + 28 dBm | +16...+ 23 dBm |
| Number of amplifying stages | - | 1-2 |
| Number of leveling GFF filters | - | 1-2 |
| Spectral flatness per 10 dB of amplification | - | ≤ 0,5 dB |
| Power adjustment range with an attenuator | 6 - 10 | 11-18, 14-24, 20-35 |