Abstract
We report a terahertz (THz) source continuously tunable over with a linewidth (close to the transform limit of pulses) and settable anywhere in the range of . The source consists of an injection-seeded intracavity THz optical parametric oscillator, which exhibits the benefits of lower threshold and enhanced efficiency and power over a similar extracavity device. Linewidth control was achieved with of seed laser power and THz pulse energies of observed with up to 68% downconversion of the pump wave. Spectroscopy of the carbon monoxide absorption line was performed to verify linewidth and demonstrate tuning capability.
© 2009 Optical Society of America
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