From S- to C-band amplification in a depressed-cladding EDFA

The influence of bending on the gain spectrum in a depressed-cladding erbium-doped fiber amplifier (EDFA) has been studied. In particular, by changing the bending diameter, it is possible to translate the amplifier band from C- to S-band. A 22 dB gain for an input signal power of -15 dBm has been obtained in S-band at 1504 nm and in C-band at 1545 with a bending diameter of 15 cm and 100 cm, respectively. By bending the erbium doped fiber with two different diameters, it is possible to obtain amplification in a wavelength range between Sand C-band.

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