Adjustable EDFA gain equalization filter for DWDM channels based on a single LPG excited by flexural acoustic waves

resumo

A fast adjustable gain equalization filter for dense wavelength division multiplexing (DWDM) system is reported. The method is based on a single long period fiber grating (LPG) which is excited by means of flexural acoustic waves. The equalization of a typical erbium doped fiber amplifier (EDFA) gain spectrum with a gain flatness of <0.3 dB over a 32 nm bandwidth is demonstrated. The filter adjustment is obtained by choosing different acoustic loads applied to the acousto-optic modulator, which presents a switching time of ∼17 μs. A maximum power penalty of 0.84 dB, relatively to the back-to-back signal, was achieved. © 2012 Elsevier B.V. All rights reserved.

autores

Marques C.A.F.; Oliveira R.A.; Pohl A.A.P.; Nogueira R.N.

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