Octave-wide tunable UV-pumped NOPA pulses at MHz repetition rate

For many applications in ultrafast spectroscopy and nonlinear microscopy, intense and fully tunable femtosecond laser pulses at high repetition rate are desirable. Fiber amplifiers deliver high peak power together with high repetition rate, high energy stability and excellent beam quality. However, they so far only provide pulse durations above 100 fs and lack flexibility in output wavelength.