Abstract
We demonstrate the generation of femtosecond pulses in a synchronously pumped optical parametric oscillator (SPOPO) at the harmonics of pump repetition rate using a SPOPO cavity longer than the fundamental synchronous length. The SPOPO is based on a crystal of periodically poled and pumped by a Kerr-lens mode-locked Ti:sapphire laser at . By increasing the SPOPO synchronous cavity length we have generated output signal pulses at successive harmonics of the pump repetition rate up to the 13th harmonic at , where average signal powers of are still available for of pump power. The generated signal pulses at are near transform limited with average durations of and a time-bandwidth product of 0.41 for input pump pulses.
© 2009 Optical Society of America
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