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We developed an efficient frequency-tunable THz source using intracavity mixing between the two resonant waves of a synchronously pumped doubly resonant OPO. Three types of quasi-phase-matched GaAs were utilized: optically contacted, orientation-patterned, and diffusion-bonded GaAs.
We demonstrate a muW-level broadly tunable THz source based on parametric down-conversion in orientation-patterned GaAs pumped by femtosecond pulses from a Tm-doped fiber laser. Generated THz powers should be scalable to mW-levels with this approach.
We report cavity-enhanced second-harmonic generation from a tightly confining non-linear optical device for optical frequency conversion, which employs a novel waveguide-embedded dichroic mirror, highly reflective at the fundamental wavelength and transmissive at the second harmonic.
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