Abstract

Efficient optical parametric oscillation is demonstrated in periodically poled stoichiometric lithium tantalate crystal pumped by a mode-locked Ti:sapphire laser. The optical parametric oscillator (OPO) delivers a maximum average power of more than 345mW in signal and 180mW in idler beams. The OPO is continuously tunable across the 9401350nm wavelength range in its signal branch, delivering nearly transform-limited 160180fs pulses. Despite the onset of high absorption loss in the crystal in the mid-IR, more than 40mW of power is obtained for the idler beam tunable within the 4.34.6μm wavelength range. The high parametric gain in the crystal allows tunable OPO operation at a repetition rate as high as 760MHz with 50mW of output power.

© 2009 Optical Society of America

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