Millimeter-wave signal generation device based on difference frequency generation in a LiTaO3 rectangular waveguide
We have proposed a new DFG-based signal generation device in a LiTaO3 rectangular waveguide. 15 GHz signal was successfully generated from the fabricated device. In this paper, its application for higher-frequency signal generation is discussed.
Detection of microwave signal by periodically-poled LiTaO3 microwave rectangular waveguide using difference frequency generation
The detection of a 15 GHz optical modulation signal was demonstrated experimentally by using difference frequency generation (DFG) in a periodically-poled LiTaO3 microwave rectangular waveguide with a resonator structure. Coupling between the fabricated device and a measuring antenna was improved by utilizing a microwave lens. The detected signal power was enhanced by about 20 dB compared with the power measured without the microwave lens.
Quasi-velocity-matched LiTaO3 guided-wave optical phase modulator for integrated ultrashort optical pulse generators
A quasi-velocity-matched guided-wave optical phase modulator using periodically domain inverted LiTaO3 is fabricated and demonstrated for the first time to the best of the authors' knowledge. Band modulation characteristics and the generation of optical side-bands of ~100 GHz are confirmed successfully. This modulator can be used to construct an integrated ultrashort optical pulse generator.