Long-haul optical transmission using distributed Raman ring laser amplification
| Project/Area Number |
18H01447
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
Sano Akihide 立命館大学, 理工学部, 教授 (20731904)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Keywords | ラマン増幅 / 光通信方式 / コヒーレント受信 / 光増幅器 / 光ファイバ / 光ファイバ通信 / コヒーレント光通信 / 光通信 |
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| Outline of Final Research Achievements |
Distributed Raman ring laser amplification (DRRLA) was proposed in order extend the transmission capacity of optically-amplified transmission systems in optical fiber transport networks, and the performance of the proposed DRRLA was evaluated. DRRLA utilizes bidirectional transmission fibers to form a ring resonator, which is pumped by second-order pump lights to generate a first-order pump light. This scheme realizes low-noise signal amplification with a simplified configuration. We proposed basic and improved configurations of DRRLA, and its feasibility was confirmed in the transmission experiments over about 10,000 km. Moreover, the gain bandwidth extension and the polarization crosstalk canceller were also successfully demonstrated.
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| Academic Significance and Societal Importance of the Research Achievements |
分布ラマン増幅(DRA)は、基幹系光通信システムの大容量化に向けて効果的な技術であり、信号光に対して約100 nm短波長側の1次励起光を伝送ファイバの後端から入力する後方一次励起の構成がすでに実用化されている。しかしながら、DRAの高性能化に向けた検討に関しては、励起光のRINや励起系構成の複雑化などの制限により、長らく停滞が続いてきたのが現状である。
こうした状況において、本研究では高次ラマン増幅と前方ラマン増幅の効果を簡易な構成で実現できることを実証したという点で重要な成果である。これは、基幹系光通信システムのさらなる大容量化につながる技術であり、大きな進展である。
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Report
(4 results)
Research Products
(14 results)
