| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
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| Research Abstract |
We have investigated spectrally-controlled fiber laser sources by photonic bandgap fibers (PBGFs) for yellow-orange high-power light sources. By inhibiting amplified spontaneous emission (ASE) at high-gain wavelengths, power scaling at the long-wavelength wing of the Yb gain band is enabled, that have not been possible in conventional lasers. An 1178 nm laser radiation with a 167 W output power and 61% slope efficiency, as well as a 589 nm laser radiation with a 14.5 W output power by second-harmonics generation have been demonstrated for the first time. An 1178 nm all-fiber fiber oscillator and a single-frequency source have been developed. We have shown PBGFs can suppress not only ASE but stimulated nonlinear scattering, that presents a great potential of the PBGF laser.
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