We demonstrate optical parametric generation and amplification of femtosecond pulses in the entire visible range using type-I phase-matched β-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 μJ/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.
© 1997 Optical Society of America
Hong Wang, Kam Sing Wong, Daoqun Deng, Zuyan Xu, George K. L. Wong, and Jingyuan Zhang, "Kilohertz femtosecond UV-pumped visible β-barium borate and lithium triborate optical parametric generator and amplifier," Appl. Opt. 36, 1889-1893 (1997)