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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.
We propose a microwave signal generation device using difference frequency generation in a periodically-poled LiTaO3 rectangular waveguide. In the experiment, a microwave signal was successfully generated at the designed frequency of 15 GHz from the intensity modulated optical signal. The measured frequency response of the fabricated proto-type device was in good agreement with the theoretically expected...
Tunable narrow band terahertz (THz) pulses were generated in periodically poled lithium niobate and lithium tantalite at 0.6 and 1.4 THz with bandwidth of 20 GHz. The generation THz frequency and intensity were strongly depending on temperature of crystal and pump laser spectral bandwidth.
Terahertz pulse were generated in periodically poled lithium niobate and lithium tantalate around 1.4 and 0.6 THz with band-width off 20 GHz. The generated intensity was rapidly increased depending on temperature decreasing of the crystal.
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...
Terahertz generations were demonstrated in periodically poled lithium niobate and lithium tantalate crystals around 1-2 THz. Different forward and backward terahertz radiations are possible in periodically poled structures via difference frequency generation within the ultra-broad pump laser. The generated THz pulses could be controlled by the quasi-phase matching structures.
Terahertz generation was demonstrated around 1~3 THz via difference frequency generation (DFG) using femtosecond pulses in a periodically poled lithium niobate (PPLN) and stoichiometric lithium tantalate (PPSLT) crystals. Two different types of terahertz radiation, forward and backward, could be generated in the quasi-phase matching (QPM) structures by the DFG process. A backward terahertz radiation...
We demonstrated tunable and narrow-band terahertz generation around l~3 THz via difference frequency generation (DFG) using femtosecond (fs) pulses in a periodically poled lithium niobate (PPLN) crystal and periodically poled stoichiometric lithium tantalate (PPSLT) crystal. Two different types of terahertz radiation, forward and backward, could be generated in the quasi-phase matching (QPM) structures...
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