High-energy ultrashort laser pulses from a simple oscillator and their efficient frequency conversion
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We introduce a novel cost-effective concept of generating broadly tunable ultrashort laser pulses at unprecedented stability. In the heart of the proposed and implemented laser system is a high-repetition rate, high-energy oscillator, generating picosecond pulses at the energy level sufficient for ultra-broadband continuum generation and parametric frequency conversion. Up to 10-W average of average power can be generated at the energy level of 10 J per pulse. Frequency conversion to a broadband continuum is achieved in specially selected optical fibers with enhanced nonlinearity via cascaded stimulated Raman scattering.