| 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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| 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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