Norihito Kawaguchi

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We report a soliton mode-locked oscillation with all-polarization maintaining fiber laser based on Carbon NanoWalls saturable absorber. Kelly sideband which is characteristic spectrum pattern of a soliton mode-locked oscillation was measured and the bandwidth was 5.7nm. High intensity and high damage threshold was also measured.
We present first-principles calculations for saturable absorption in graphite based on time-dependent density functional theory. Solving time-dependent Kohn-Sham equation for bulk graphite under a strong and ultrashort electric field, we have succeeded to investigate the temporal behavior of saturable absorption without any empirical parameters. It is found(More)
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