Figure 5From: Conception, modelling, and characterization of a fiber amplifier with a simple and easy-to-repair configuration intended for the use in harsh environmentsNormalized optical spectrum of the YDFA output for seed optical power \(P_{S}=0.2~{\mathrm{W}}\) and pump optical power \(P_{P}=5~{\mathrm{W}}\). The YDF length is \(L_{\mathrm{fiber}} = 4.7~{\mathrm{m}}\)Back to article page