Acta Optica Sinica, Volume. 23, Issue 11, 1311(2003)
The Influence of Pumping Configuration in Hybrid Raman Fiber Amplifier on Its Performance
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.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. The Influence of Pumping Configuration in Hybrid Raman Fiber Amplifier on Its Performance[J]. Acta Optica Sinica, 2003, 23(11): 1311