title: Kilohertz femtosecond UV-pumped visible beta-barium borate and lithium triborate optical parametric generator and amplifier.
abstract: We demonstrate optical parametric generation and amplification of femtosecond pulses in the entire visible range using type-I phase-matched beta-barium borate and lithium triborate crystals pumped by the frequency-doubled output of a Ti:sapphire regenerative amplifier at 395 nm. The output is tunable from 470 to 770 nm with a pulse width of ~170 fs at a repetition rate of 1 kHz and a maximum output energy of ~1.1 muJ/pulse. The visible optical parametric amplifier output was then frequency doubled and sum frequency mixed with the fundamental output of Ti:sapphire at 790 nm to produce UV pulses with a conversion efficiency of greater than 25%. The second harmonic generated UV pulses are tunable from 240 to 380 nm with a maximum pulse energy of ~260 nJ/pulse.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: K S
authors.initials: KS
authors.lastname: Wong
authors.forename: D
authors.initials: D
authors.lastname: Deng
authors.forename: Z
authors.initials: Z
authors.lastname: Xu
authors.forename: G K
authors.initials: GK
authors.lastname: Wong
authors.forename: J
authors.initials: J
authors.lastname: Zhang