| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
The possibility of optimization design of the nonlinear optical system with parameter ΔS is explored in consideration of the spiral phase and radial or azimuthal polarization, and a simple design method with ΔS is set up for ultrahigh intensity and ultrashort laser pulses. A new scheme of the second-harmonic generation with a radially-polarized fundamental donut beam through two type I LBO crystals is proposed, and the second-harmonic beam with the same profile as that of the fundamental beam is numerically demonstrated. Operation properties of an optical system for elliptical beam generation is investigated in order to estimate practical issues on the application with a vortex vector laser beam to material processing. Experimental results of system characteristics showed that the focal line width at the focal point is the same as that of the diffraction limitation. The reproducibility, stability and accuracy of the system that need to commercialization are also confirmed.
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