Broadband coherent anti-Stokes Raman scattering light generation in BBO crystal by using two crossing femtosecond laser pulses

摘要

As broad as 12000 cm−1 coherent anti-Stokes Raman scattering (CARS) light from ultraviolet to infrarednwas generated in a BBO crystal by using two crossing femtosecond laser pulses with 30% conversion effi-nciency. More than fifteenth-order anti-Stokes and second-order Stokes Raman sidebands were observed withnnice Gaussian spatial mode. The effect of the crossing angle between two input beams on the spectrum andnemitting angle of the Raman sidebands was studied in detail. Calculation shows that the phase-matchingncondition determines the frequencies and angles of the sidebands. © 2008 Optical Society of America