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We have observed enhancements of forward and backward anti-Stokes Raman signals generated in lithium niobate waveguides by one order of magnitude. Forward and backward exhibit different spectral features, unique for two configurations.
The resolution of a terahertz scanning imaging system based on a CO2 pumped continuous-wave terahertz laser at 2.52 THz was measured. A self-made resolution test chart was employed and scanned. The imaging results show that the system's resolution is 0.6 mm. The experiment results are also compared with the results of another point-by-point scanning imaging system. The study can make a contribute...
By coupling two counter-propagating fundamental beams into a LiNbO3 channel waveguide, we have generated a strong surface-emitting second-harmonic beam, with normalized conversion efficiency being enhanced by seven orders of magnitude.
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