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We demonstrate a ring-shaped Bessel-like photonic lattice akin to a photonic bandgap fiber with a low-index core. While the lattice is optically induced with self-defocusing nonlinearity, bandgap guidance of a probe beam is clearly observed.
We report on the observation of electromagnetically induced transparency using the hyperfine levels of Er3+:Y2SiO5 crystal and on hole burning spectroscopy in order to identify the Lambda-like three-level system over the inhomogeneously broadened distribution.
Blue light-induced infrared absorption is investigated in bulk and periodically poled KTiOPO4, MgO:stoichiometric-LiNbO3, MgO:stoichiometric-LiTaO3, KNbO3. KNbO3 and MgO:stoichiometric-LiNbO3 show the lowest susceptibility to the induced absorption. Periodic poling increases the susceptibility in KTiOPO4 and MgO:stoichiometric-LiTaO3.
We report the first experimental characterization of the room temperature gain dynamics of InAs quantum dash optical amplifiers operating at wavelength of 1550 nm. A gain recovery time of 150 ps was observed.
We examine the temperature dependence of the ground state homogeneous linewidth in InGaAs/GaAs quantum dots. Measurements using a high-resolution spectral hole burning technique are performed on quantum dots in a semiconductor waveguide.
We have demonstrated an all-optical time and wavelength switch using cascaded second-order nonlinearities of a PPLN waveguide incorporated in a fiber based loop interferometer. Switching efficiency as high as 90.3% has been achieved.
We experimentally demonstrate a novel Kerr shutter functioned by the interaction of carbon nanotubes with the evanescent-field of propagating light in a D-shaped fiber. The scheme initiates applications of the nanotubes to ultrafast all-optical switches.
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