Cost-effective double pass erbium doped fiber amplifier with an embedded dispersion compensation module and all-optical gain control for wavelength-division multiplexing applications - Oliveira, Julio César Rodrigues Fernandes de; Rosolem, João Batista; Juriollo, Antonio Amauri; Romero, Murilo Araujo; Bordonalli, Aldário Chrestani (Optical Engineering, 2007)