Few-cycle, broadband, mid-infrared parametric oscillator pumped by a 20-fs Ti:sapphire laser

We report a broadband mid-IR femtosecond OPO tunable across 2179–3732 nm, pumped by 20-fs pulses at 790 nm, generating idler pulses of 4.3 optical cycles (33 fs) at 2282 nm, with high stability and beam-quality.