Low-threshold and compact multicolored femtosecond laser generated by using cascaded four-wave mixing in a diamond plate

Low-threshold and compact multicolored laser generated by cascaded four-wave mixing in a diamond plate is demonstrated. The spectra and output energy of the generated sidebands up to 2nd order on the Stokes side and >12th on the anti-Stokes side covering from near infrared to UV, are shown. The 2-D multicolor arrays were also observed in diamond plate with low threshold and explained briefly. The compact wavelength-tunable multicolored laser setup is promising to be used in spectroscopy experiments, for example multicolor pump-probe experiments.

► A low-threshold and compact femtosecond multicolored laser was generated. ► 2-D multicolored arrays were observed in diamond plate with low threshold. ► The mechanism of the generation of 2-D multicolored arrays by using two noncollinear overlapped beams was discussed.