Abstract

We demonstrate, for the first time to our knowledge, multikilohertz operation of a double-stage optical parametric chirped pulse amplifier with periodically poled stoichiometric LiTaO3 crystals, seeded by a homemade Cr:forsterite oscillator operating at 1235nm. The repetition rate of the amplifier could easily be tuned without the use of electro-optic modulators by using a repetition-rate-tunable kilohertz pump laser operating at 532nm and a time-synchronization unit. Amplified total (signal+idler) energies of 55.9 and 36.2μJ were achieved at 1 and 5kHz, respectively. After recompression, the pulse width of amplified idler pulses at 1235nm amounted to 530fs.

© 2007 Optical Society of America

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