| Budget Amount *help |
¥43,420,000 (Direct Cost: ¥33,400,000、Indirect Cost: ¥10,020,000)
Fiscal Year 2015: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2014: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2013: ¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000)
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| Outline of Final Research Achievements |
We have explored new methods for scaling the energy/peak-power limits of fiber lasers determined by various fiber nonlinearities. Photonic bandgap fiber has the inherent distributed spectral filtering, enabling suppression of stimulated Raman scattering. We have achieved an order of magnitude power scaling of pulsed fiber lasers. In addition, mitigation of stimulated Brillouin scattering by acoustic antiguiding was also pursued and we demonstrated high-power single-frequency operation.
We also studied power scaling by multicore fibers. Phase-locking operations by self-imaging as well as by a new method of using a saturable absorber have been demonstrated. We showed the self-focusing limit, the ultimate limit among various nonlinearities, can be scaled by the core number by adopting the out-of-phase mode.
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