Multi-channel gain and noise figure evaluation of Raman/EDFA hybrid amplifiers

Abstract We present detailed multi-channel experimental characterization of different configurations of single pump hybrid Raman–erbium doped fiber (EDF) amplifiers. The incorporation of an EDF section in a dispersion compensating Raman amplifier is demonstrated to provide superior performance than Raman only system. It is shown that the multi-channel gain spectrum is quite different form the single-channel case. We have also measured the polarization dependent gain (PDG) of the hybrid amplifier configurations and results show that different configurations of hybrid amplifiers have different PDG effects on long-haul optically amplified link.

[1]  G Jacobsen,et al.  Influence of polarization mode dispersion value in dispersion-compensating fibers on the polarization dependence of Raman gain. , 2002, Optics letters.

[2]  Young-Geun Han,et al.  A detailed experimental study on single-pump Raman/EDFA hybrid amplifiers: static, dynamic, and system performance comparison , 2005 .

[3]  M.G. Taylor.  Observation of new polarization dependence effect in long haul optically amplified system , 1993, IEEE Photonics Technology Letters.

[4]  V. J. Mazurczyk,et al.  Polarization dependent gain in erbium doped-fiber amplifiers , 1994 .

[5]  J. Bromage,et al.  Raman amplification for fiber communications systems , 2003, Journal of Lightwave Technology.

[6]  K. L. Lear,et al.  Evaluation of nonuniform WDM source spacing for EDFA gain characterization , 2002, IEEE Photonics Technology Letters.

[7]  C. Fludger,et al.  Pump to signal RIN transfer in Raman fibre amplifiers , 2001 .

[8]  E. Lichtman.  Limitations imposed by polarization-dependent gain and loss on all-optical ultralong communication systems , 1995 .

[9]  J. W. Nicholson,et al.  Dispersion compensating Raman amplifiers with pump reflectors for increased efficiency , 2003 .

[10]  K. Nakajima,et al.  A novel method for evaluating the cutoff characteristic in a fiber with improved bending loss , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[11]  J. Stimple,et al.  WDM EDFA gain characterization with a reduced set of saturating channels , 1996, IEEE Photonics Technology Letters.

[12]  K. Okamoto,et al.  Hybrid dispersion compensating Raman amplifier module employing highly nonlinear fiber , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..