نتایج جستجو برای: difference frequency generation dfg
تعداد نتایج: 1202258 فیلتر نتایج به سال:
In the last years, the Terahertz (THz) domain has attracted an increasing interest in the scientific community due to the large number of applications that have been identified (Tanouchi, 2007). Even if many different Terahertz sources like photomixers, quantum cascade lasers, and photoconductive antennas (Mittleman, 2003) have been investigated in the past, the fabrication of a compact device ...
Generation of high-quality terahertz OAM mode based on soft-aperture difference frequency generation
We reported a type-I difference-frequency generator (DFG), based on erbium doped GaSe (Er:GaSe) crystals as a coherent infrared source tunable from 2.4 mum to 28 mum. The two mixing beams used for the DFG are a tunable near infrared output (1.1-1.8 mum) from an optical parametric amplifier (OPA) and the fundamental beam of a picosecond Nd:YAG laser at 1.064 mum. The system can produce a maximum...
A mid-infrared difference frequency generator (DFG) based on a periodically poled thin-film lithium niobate rib waveguide sapphire substrate is theoretically studied. mode analysis carried out at the region, and focuses effects of geometry effective refractive indices few lower-order modes. complete theory suitable for modeling DFG structure described. Its validity confirmed by comparing theore...
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