Abstract

We demonstrate a high-energy near-infrared cavity-dumped femtosecond optical parametric oscillator (OPO) based on periodically poled lithium niobate. The laser generates 90 nJ pulses at a repetition rate of up to 1 MHz when synchronously pumped by 800 mW output from a femtosecond Ti:sapphire laser. The laser is broadly tunable from 1.0 to $1.5\mu \mathrm{m}$ in the signal branch, with a pulse duration of $<60$ fs at $1.2\mu \mathrm{m}$. High intracavity power is achieved by running the laser in the regime of positive group-velocity dispersion.

© 2005 Optical Society of America

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