Abstract
This chapter describes the technologies needed for cascading an erbium-doped fiber amplifier (EDFA) and a fiber Raman amplifier (FRA or RA) to create a hybrid amplifier (HA), the EDFA/Raman HA. Two kinds of HA are defined in this chapter: the narrowband HA (NB-HA) and the seamless and wideband HA (SWB-HA). The NB-HA employs distributed Raman amplification in the transmission fiber together with an EDFA and provides low noise transmission in the C- or L-band. The noise figure of the transmission line is lower than it would be if only an EDFA were used. The SWB-HA, on the other hand, employs distributed or discrete Raman amplification together with an EDFA, and provides a low-noise and wideband transmission line or a low-noise and wideband discrete amplifier for the C- and L-bands. The typical gain bandwidth (Δλ) of the NB-HA is ~30 to 40 nm, whereas that of the SWB-HA is ~70 to 80 nm.
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Masuda, H. (2004). Hybrid EDFA/Raman Amplifiers. In: Islam, M.N. (eds) Raman Amplifiers for Telecommunications 2. Springer Series in Optical Sciences, vol 90/2. Springer, New York, NY. https://doi.org/10.1007/978-0-387-21585-3_4
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DOI: https://doi.org/10.1007/978-0-387-21585-3_4
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