BiB₃O₆ high power femtosecond optical parametric oscillator pumped at 515 nm with phase-matching inside the <i>xz</i> optical plane

We report a high power, synchronously pumped femtosecond optical parametric oscillator (SPOPO) based on type I phase-matching inside the <i>xz</i> optical plane of a BiB₃O₆ crystal. The OPO, pumped by 3.5 W power of femtosecond green pulses at 515 nm with 76 MHz repetition rate produces high power (>1 W) signal pulses tunable in the visible range of 620-705 nm and powerful (hundreds of mW) idler pulses in the wide infrared range of 1900-3040 nm.