515 nm pumped femtosecond optical parametric oscillator at 755 MHz based on BiB_3O_6

摘要

We report a high-power femtosecond optical parametric oscillator (OPO) based on BiB3O6 crystal with a repetition rate of 755 MHz, which is 10 times that of the pump laser. With 3.75 W pump power from a 90 fs frequency-doubled mode-locked Yb:KGW oscillator, the OPO can provide signal pulses tunable over a spectral range from 693 to 1000 nm and idler pulses tunable from 1100 to 2000 nm. The maximum signal output power is 1.34 W centered at 746 nm and the corresponding idler output power is 0.408 W at 1663 nm. Laser pulse as short as 67 fs is obtained at the central wavelength of 722 nm. This work is promising for a variety of applications in optical communications and pump-probe spectroscopy.