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Novel split-band erbium-doped fiber amplifier
Authors:Chun    Weisheng Hu   Qingji Zeng  Shilin Xiao
Affiliation:National Key Laboratory on Advanced Optical Communication System & Network, College of Electronics and Information, Shanghai Jiao Tong University, Shanghai 200030, People's Republic of China
Abstract:In this paper we design a 120 nm bandwidth erbium-doped fiber amplifier using a seed light injection method for the first time. It is shown that when the wavelength of the seed light varies from 1520 to 1570 nm, the gain at 1610 nm reaches maximum near 1553 nm and increases as the seed light power. Based on the method, a novel split-band EDFA configuration is designed. The split-band architecture employs a 1550/1610 nm waveband multiplexer/demultiplexer and two independent sub-bands which pass in parallel through separate branches of the optical amplifier. The signals at independent sub-bands are combined and flattened before output, resulting in a broadband gain-flattened optical amplifier with 120 nm bandwidth.
Keywords:Erbium-doped fibre amplifier   DWDM   Novel split-band structure   Broad band
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