| Low pump power co-fiber remotely pumped EDFA used in DWDM systems with ultra-long fiber span |
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| 作者姓名： | 张帆 张巍 王燕 彭江得 |
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| 作者单位： | Electronic Engineering Department，Tsinghua University，Beijing 100084，Electronic Engineering Department，Tsinghua University，Beijing 100084，Electronic Engineering Department，Tsinghua University，Beijing 100084，Electronic Engineering Department，Tsinghua University，Beijing 100084 |
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| 摘 要： | Extending span distance is an important way to reducethe cost of long-haul dense wavelength division multi-plexing (DWDM) systems. In traditional DWDM sys-tems based on erbium-doped fiber amplifiers (EDFAs),span distance is about 80—100 km. Quantum limitationin noise figure (NF) of EDFAs (3 dB) prevents furtherextension of span distance with acceptable costs on trans-mission distance. capacity, and performance. Distributedfiber Raman amplifiers (DFRAs) have been proven tohave better…
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