The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We experimentally demonstrate group velocity control of 40-fs, 1400-nm pulses through chi(2)-cascaded interactions under large group velocity mismatch. Group delay shifts up to 50 fs are achieved by propagation in a 25-mm-long PPSLT crystal.
We observed 7.2 dB squeezing of continuous-wave light at 860 nm with a periodically-poled KTiOPO4 crystal in an optical parametric oscillator. The squeezing level was obtained as the LO phase was locked.
We report on a singly resonant injection seeded optical parametric ring oscillator with signal pulse energy of up to 38 mJ, 50% pump depletion, spectral purity of 99.97%, and M2 of about 6.
The first hyperpolarizabilities (beta) of several ldquoH-shapedrdquo second-order nonlinear optical chromophores measured by hyper-Rayleigh scattering technique exhibit much higher values than those of their monomers with slight absorption red shifting because of intra-molecular interactions.
The OPO arrangement with intracavity OPA at the idler wavelength is experimentally and theoretically investigated in the context of pulsed devices emitting several mJ. Benefits and drawbacks are discussed versus the conventional singly resonant OPO.
We demonstrate generation of few-cycle THz pulses through optical rectification in organic DAST crystals at telecommunication wavelength (1550 nm). An extremely high conversion efficiency is achieved through velocity-matching and the materialpsilas large nonlinear optical susceptibility.
Optical waveguides in nonlinear crystals of Sn2P2S6 have been produced by He+ ion implantation. Best results are obtained with a fluence about Phi = 0.5 middot 1015 ions/cm2 and for hybrid n1-mode. The depth of the induced optical barrier is Deltan1 = -0.07 at lambda = 0.633mum.
It is widely believed that future high speed optical communications networks will require all-optical signal processing to overcome the so-called ldquoelectronic bottleneckrdquo. This tutorial reviews approaches to all-optical processing using third order nonlinear materials.
We realized, for the first time, NOLM-type all optical switching with carbon nanotubes loaded planar waveguide. ~20% splitting ratio contrast has been achieved using just 1 cm-long carbon nanotubes loaded planar waveguide.
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.
Orientational dynamics of nematic liquid crystals are studied using optical Kerr effect experiments in isotropic phase. A combined theory of mode coupling theory and Landau-de Gennes theory is successful to reproduce the data.
We have developed a vectorial quantum model of spontaneous parametric down-conversion in one-dimensional nonlinear photonic-band-gap structures that shows that these structures represent a promising perspective source of entangled two-photon states.
We report optical parametric generation and amplification in BiB3O6. Using 420 muJ, 35-ps pump pulses at 532 nm, signal and idler output pulse energies of 120 muJ have been generated at 29% efficiency.
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 generation of tunable femtosecond pulses in the ultraviolet using the nonlinear crystal BiB3O6. Average powers of 20 mW tunable over 310-355 nm at a pulse repetition rate of 76 MHz are demonstrated.
An intense comb-shaped phonon-polariton Raman spectra were obtained from a two-dimensional nonlinear chi(2) photonic crystal - a hexagonally poled LiTaO3 crystal. The work presents a novel method to study the inelastic scattering in a nonlinear medium.
The design rationale, synthesis, and characteristics of organic chromophores exhibiting very large EO response is presented along with new methodologies to assembled them in a noncentrosymmetric fashion.
We report the effect of pi-conjugation length on three-photon absorption cross-section of fluorene derivatives with different structural motifs. We demonstrate that three-photon absorption is enhanced by extending the conjugated bridge of those systems.
We report the light-assisted poling of controllable periodic and arbitrarily-shaped domain patterns in lithium niobate and lithium tantalate via the simultaneous application of a low uniform DC electric-field and sequence of ultrashort pulses (150-200 fs).
We report a new methodological step leading to the self-sufficiency of the sphere method for the complete characterization of the optical properties of biaxial crystals. It relies on the study of the double refraction effect.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.