Capacity upgrades of transmission systems by Raman amplification

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作者：
Lucent Technologies, Holmdel, United States [1 ]
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来源：
IEEE Photonics Technol Lett | / 2卷 / 262-264期
关键词：
Channel capacity - Electromagnetic dispersion - Fiber optic sensors - Frequency division multiplexing - Gain measurement - Light measurement - Optical pumping - Raman scattering - Semiconductor lasers - Signal receivers - Time division multiplexing - Timing circuits;
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摘要：
Raman amplification is added to a transmission system to provide an increase in power budget allowing for a four-fold upgrade in capacity either by TDM or WDM. Here, a TDM upgrade from 2.5 to 10 Gb/s and a WDM upgrade from a single 10-Gb/s channel to four channels of 10 Gb/s each were experimentally verified with an improvement in the power budget of 7.4 dB. Raman gain is an attractive upgrade method for installed systems requiring no changes to the fiber span.
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