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US 2002/0159138 A1Published application
Access device for pump source in cascade erbium-doped fiber amplification
OwnerMeiyu Zouinventor
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OwnerMeiyu Zouinventor
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An access device for pump source in Erbium-doped fiber amplification is disclosed into the open by the present invention. The device comprises at least two pump sources. Before accessing to the wavelength division multiplexers of the Erbium-doped fiber amplifier, the pump sources are coupled by the couplers, the power of the output light of each pump source is reassigned at the output ports of the couplers. In this manner, all of the pump sources are constructed as an entity, the gain of the entire or plurality of the segments of the Erbium-doped fiber will be affected according to a fixed ratio when adjusting the power of one of the pump sources, therefore the bad influence to the smoothness of the output gain spectrum will not be occurred, or will be decreased, and the difficulty of controlling the smoothness of the gain can be decreased.
An access device for pump source in cascade Erbium-doped fiber amplification comprises at least two pump lasers, and the pump light outputs from them are multiplexed with the signal light by the wavelength division multiplexers before they access to the Erbium-doped fiber, wherein, the couplers are also included in the access device for pump source, and the pump light outputs from said pump laser are coupled by the couplers at first, then it is input to the wavelength division multiplexes.
Dependencies are inferred from the claim text.