| Project/Area Number |
21K14165
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 21020:Communication and network engineering-related
|
|---|
| Research Institution | National Institute of Information and Communications Technology |
|---|
Principal Investigator |
Rademacher Georg 国立研究開発法人情報通信研究機構, ネットワーク研究所フォトニックICT研究センター, 主任研究員 (20795661)
|
|---|
| Project Period (FY) |
2021-04-01 – 2023-03-31
|
| Project Status |
Completed (Fiscal Year 2022)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
|
|---|
| Keywords | Optical Fiber / Space Division Multiplex / Raman amplification / SDM |
|---|
| Outline of Research at the Start |
Current optical transmission systems are reaching fundamental throughput limitations. Two main approaches are currently being researched to increase the data-rates in optical fiber transmission systems: space-division multiplexing, where signals are transmitted in different spatial channels of a fiber and multi-band transmission, where the spectral region for transmission is extended beyond the traditional C-band around 1.55μm wavelength. The focus of this project is to investigate the compatibility of novel SDM fibers with the transmission of novel spectral transmission windows.
|
| Outline of Final Research Achievements |
Current optical transmission systems are reaching fundamental throughput limitations. Two main approaches are currently being researched to increase the data-rates in optical fiber transmission systems: space-division multiplexing, where signals are transmitted in different spatial channels of a fiber and multi-band transmission, where the spectral region for transmission is extended beyond the traditional C-band around 1.55μm wavelength. The focus of this project was to investigate the compatibility of novel SDM fibers with the transmission of novel spectral transmission windows. We performed various experiments using wideband Raman amplification in novel few-mode fibers and published the results at the optical fiber communications conference 2022. We also performed an experiment using erbium doped fiber amplifiers for C- and L-bands to show record transmission of more than 3.5 Peta-bit/s over a 55-mode multi-mode fiber.
|
| Academic Significance and Societal Importance of the Research Achievements |
近年、通信トラヒックは国内外で年率数10%の割合で増大を続けており、将来の通信インフラを持続的に維持するため、光伝送システムの増強が喫緊の課題となっている。現在、波長多重技術やディジタルコヒーレント技術によって光ファイバ１本あたり数10テラビット/秒もの伝送容量が得られるようになったが、高強度の光信号と光ファイバ間の非線形相互作用により、伝送容量の増加は容易ではない。本研究では、マルチコアファイバやマルチモードを用いた空間多重伝送技術と、従来のCバンドに加えてL、Sバンドを利用するマルチバンド伝送技術との間の互換性を確認し、将来の光伝送システムの伝送容量増加の可能性を示した。
|
