Abstract

We implemented a singly resonant optical parametric oscillator based on adhesive-free-bonded periodically inverted ${\mathrm{KTiOPO}}_4$ plates. It has major advantages such as walk-off compensation and oscillation at four wavelengths. The threshold of the oscillation was measured to be $8\mathrm{MW}/{\mathrm{cm}}^2$, which is about a factor of 4 lower than that based in two separate ${\mathrm{KTiOPO}}_4$ crystals. By frequency-mixing the dual-wavelength output in GaP stacks, we generated the terahertz radiation at $2.54\mathrm{THz}$. The tuning range of the terahertz output was demonstrated to be $2.19–2.77\mathrm{THz}$.

©2012 Optical Society of America

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