Ultra-broadband optical parametric amplification in KBe2BO3F2 crystal

It has been demonstrated for the first time that ultra-broadband phase-matching coupled with group-velocity matching is possible in a type-I non-collinear optical parametric amplifier in a recently grown KBe2BO3F2 (KBBF) crystal, pumped by Ti:sapphire second harmonic 395 nm radiation and seeded by white-light continuum.