Effective coexistence between normal- and extended-distance PON areas by using ALC-SOA
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概要
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The dual stage optical splitter configuration is often utilized in PON systems to effectively accommodate widely-dispersed users. This paper introduces a more effective user accommodation approach that places bidirectional optical amplifiers in some branches of the optical splitter inside the central office (CO); it allows a single optical line terminal (OLT) to achieve the coexistence of normal- and extended-distance areas. To ease the issue of amplified spontaneous emission (ASE) noise, which is inherent in this system configuration, we propose to use a semiconductor optical amplifier (SOA)-based burst-mode optical amplifier with a fast automatic level control (ALC) circuit for upstream amplification.
著者
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Fujiwara Masamichi
Ntt Access Network Serv. Systems Laboratories Ntt Corp.
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Yoshimoto Naoto
Ntt Access Network Serv. Systems Laboratories Ntt Corp.
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Ishii Hiroshi
NTT Access Network Service Systems Laboratories, NTT Corporation
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Imai Takeshi
NTT Access Network Service Systems Laboratories, NTT Corporation
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Suzuki Ken-Ichi
NTT Access Network Service Systems Laboratories, NTT Corporation
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Taguchi Katsuhisa
NTT Access Network Service Systems Laboratories, NTT Corporation
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