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Proceedings Paper

Analysis of a multi-pump optimization in Raman+EDFA hybrid amplifiers with pump recycling for WDM systems
Author(s): Marcia da Morta Jardim Martini; Hypolito José Kalinowski; Carlos Eduardo S. Castellani; Maria José Pontes; Moises Renato Nunes Ribeiro
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Paper Abstract

This paper analyzes multi-pump Raman+EDFA hybrid amplifiers with pump recycling using an improved technique that optimizes the gain and ripple of the amplifier for wavelength division multiplexing (WDM) applications. This technique is based on the equalization of Erbium's gain spectrum by adjusting the flexible gain profile of a multi-pump Raman amplification stage. The residual Raman pump recycled by the Erbiumdoped section is used to increase power pump efficiency. Multi-channel simulated gain characterization of the hybrid amplifier recycling Raman pump, in terms of global gain, ripple, and noise figure, is presented. Different configurations of the Raman stage with single, two, three and four-pump lasers are analyzed. For 8 WDM input channels with two and three-pump lasers, ripple values have presented variation from 3 to 9 dB against 4.3 to 12.6 dB obtained with the previous method, depending on the input power and number of pumps. The ripple analysis have has shown that the proper selection of pump wavelengths and powers, enables the construction of broadband hybrid Raman+EDFA amplifiers with enhanced power conversion efficiency and high and flat gains.

Paper Details

Date Published: 17 May 2010
PDF: 11 pages
Proc. SPIE 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers, 77210R (17 May 2010); doi: 10.1117/12.853457
Show Author Affiliations
Marcia da Morta Jardim Martini, Univ. Tecnológica Federal do Paraná (Brazil)
Ctr. Federal de Educação Tecnológica de Minas Gerais (Brazil)
Hypolito José Kalinowski, Univ. Tecnológica Federal do Paraná (Brazil)
Carlos Eduardo S. Castellani, Univ. Federal do Espírito Santo (Brazil)
Maria José Pontes, Univ. Federal do Espírito Santo (Brazil)
Moises Renato Nunes Ribeiro, Univ. Federal do Espírito Santo (Brazil)


Published in SPIE Proceedings Vol. 7721:
Solid State Lasers and Amplifiers IV, and High-Power Lasers
Thomas Graf; Gerhard G. Paulus; Jacob I. Mackenzie; Vincent Bagnoud; Catherine Le Blanc; Helena Jelinková, Editor(s)

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