Abstract
The performance of forward-and backward-pumped Raman fiber amplifier/erbium doped fiber amplifier (EDFA) hybrid amplifiers was experimentally compared. 75 km standard single mode fiber (SSMF) was employed as the transmission line. 20 channels in C-band with a total power of -2.86 dBm, ranging from 1537.377 to 1560.605 nm on the ITU-T grid were used as the incident signals of hybrid amplifiers. Each channel was modulated by an electro-absorption (EA) modulator using a 2.5 Gb/s nonreturn-to-zero (NRZ) format, with a 27-1 long pseudo-random bit sequence (PRBS) signal. Experimental results have suggested some of relative merits of forward-pumped RFA/EDFA hybrid amplifiers. The improvement of noise figure (NF) arranged from 2.24 dB to 6.55 dB. The gain increase was higher than 5 dB for any channel in forward-pumped hybrid amplifiers in comparison with backward-pumped hybrid amplifiers. However, the optical signal-to-noise ratio (OSNR) is higher than 26.9 dB in either pumped configuration for hybrid amplifiers.
| Original language | English |
|---|---|
| Pages (from-to) | 1311-1314 |
| Number of pages | 4 |
| Journal | Guangxue Xuebao/Acta Optica Sinica |
| Volume | 23 |
| Issue number | 11 |
| Publication status | Published - Nov 2003 |
| Externally published | Yes |
Keywords
- Erbium-doped fiber amplifier
- Guided wave and fiber optics
- Hybrid amplifiers
- Optical signal-to-noise ratio
- Raman fiber amplifier (RFA)