Abstract
We demonstrate the ability to generate ultra-high-frequency sequences of broadly wavelength-tunable, high-intensity laser pulses using a custom-built optical parametric oscillator pumped by the third-harmonic output of a “burst-mode” Nd:YAG laser. Burst sequences consisting of 6–10 pulses separated in time by are obtained, with average total conversion efficiency from the pump to the near-IR signal and idler wavelengths of . Typical individual pulse output energy for the signal and idler beams is in the range of , limited by the available pump energy. Line narrowing is demonstrated by means of injection seeding the idler wave using a low-power external-cavity diode laser at . It is shown that seeding reduces the time-averaged linewidth of both the signal and idler outputs to , which is near the Fourier transform limit. Line narrowing is achieved without recourse to active cavity stabilization.
© 2007 Optical Society of America
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