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Recent progress in quantum communication highlights the need of advanced non-Gaussian states exhibiting high purity and spatio-spectral single-mode characteristics. We employ tailored waveguides and photon counting to implement efficient state preparation suitable for quantum networks.
It is proposed and investigated the 8-cm-long slightly curved parallel plate oversized waveguide as wideband THz interconnecting line. Its use in waveguide TDS is demonstrated by measuring absorbance of tiny amount of water vapor.
Tunable edge emitting microlaser was realized with a line defect waveguide, in which the radii of holes adjacent to the defect was varied gradually. A tunable range of 17 nm was obtained experimentally.
We report an efficient technique to measure gain and losses of quantum cascade lasers (QCLs). It consists on the analysis of the Fabry-Perot fringes induced by the optical injection of a chirped distributed feedback QCL.
Continuous channel waveguides in periodically poled KTiOPO4 with guided orthogonal polarizations are used to demonstrate type-II background-free second harmonic generation at 1505 nm with 1.2 %/(W cm2) normalized efficiency.
We report the first waveguide laser based on rare-earth sesquioxides. A structured Nd(0.5%):(Gd, Lu)2O3 film pumped at 820 nm showed lasing at 1.08 mum. The laser threshold was 0.8 mW, the preliminary slope efficiency 0.5% and the maximum output power 1.8 mW.
MQW 1060 nm structures with extremely thick 8.64 mum waveguide resulting in 8deg angle of vertical divergence have been grown and tested. The measurements of uncoated lasers promise high optical power operation with nearly circular beam-shape.
Laser-written single-mode waveguides in As2Se3/As2S3 films were characterized at 8.35 mum using the Fabry-Perot technique. Waveguide loss and refractive index were measured as a function of writing dose and compared to modeling results.
We report a 4.3-mum wavelength conversion laser source using a quasi-phase-matched LiNbO3 waveguide. Using the laser source operated at ambient temperature and in the continuous wave mode, we successfully obtain CO2 isotopomer absorption lines.
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