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We investigate the optimization of a 980-nm-pumped, two-stage in-line erbium-doped fiber amplifier with high unsaturated gain (G > 30 dB), low noise figure (NF < 3.5 dB) and high output saturated power (P Sat > 12 dBm). More specifically, we contrast the amplifier performance trade-offs for four cases of interstage components including isolator and bandpass filtering as a means to...
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