Development of low cost efficient ultrashort pulse laser system

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A diode-pumped passively mode-locked Yb : YAG ceramic laser was demonstrated. We successfully achieved passive mode locking. To the best of our knowledge, this is the first mode-locked Yb : YAG ceramic laser, and the shortest pulse for diode-pumped ceramic lasers without Kerr lens mode locking was obtained. However, the average output power of laser was low as 20 mW. Furthermore we experimentally demonstrated a dual-wavelength independently mode-locked Yb : YAG ceramic laser in a single cavity. Next, we obtain the average power of 3.9 W by replaseing a prism pair by dispersion compensation mirror. To our knowledge it is the highest power. Finally, the ultrashort highpower laser pulse was propagated in a low-dispersion fiber propagation and super continuum was generated.