A femtosecond green-pumped optical parametric oscillator (OPO)based on the LBO crystal is proposed,and 525 nm green fiber laser system is used as the pump source.The tunable spectral range of signal pulses generated by OPO is from 780 to 940 nm and optical power reaches up to 250 mW;the tunable spectral range of idler pulses is from 1630 to1190 nm and optical power reaches up to 300 mW.The coherent anti-Stokes Raman scattering spectrum are measured between 1330 and 6650 cm-1 by using this system.Due to the pulse chirp,a spectral resolution of 100 cm-1 is achieved,whose resolution is 2.5 times higher compared to an excitation source with time-bandwidth limited pulses.