Abstract
Bai NieMichigan State UniversityDepartment of Physics and AstronomyEast Lansing, Michigan 48824Greg ParkerVadim Vadimovich LozovoyMichigan State UniversityDepartment of ChemistryEast Lansing, Michigan 48824Marcos DantusMichigan State UniversityDepartment of Physics and AstronomyEast Lansing, Michigan 48824andMichigan State UniversityDepartment of ChemistryEast Lansing, Michigan 48824E-mail: dantus@msu.eduAbstract. A Yb fiber oscillator producing high-energy femtosecond pulseclusters is reported. Visualized by averaging autocorrelation, the outputpulses consist of femtosecond pulse clusters that appear as a picosecondenvelope with a ∼100-fs pulse in its center. Using more than 200-m fiber,the pulse energy is scaled up to 450 nJ. This high energy in a cluster offemtosecond pulses enables an important application—laser-inducedbreakdown spectroscopy.
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