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Propagation length enhancement of surface plasmon polariton (SPP) wave in telecom c-band through nonlinear χ(2)-based nondegenerate difference frequency generation (ndDFG) process is investigated theoretically. The SPP wave is excited in a silver coated planar periodically poled lithium niobate (PPLN) waveguide. Quasi phase matching is used to compensate the phase mismatch between the interacting...
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.
A room-temperature broadly tunable mid-infrared laser system based on quasi-phase-matched (QPM) difference frequency generation (DFG) in a periodically poled LiNbO3(PPLN) crystal is developed. The continuous wave mid-infrared coherent radiation from 3.2 to 3.7 mum with a maximum output power of about 1 muW has been generated. Performance characteristics of the mid-infrared laser system has been carried...
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.
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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