Showing papers in "Optical Materials in 1997"

TL;DR: In this paper, a self-frequency doubling method using GdCOB has been demonstrated with a cw Ti:sapphire pump source, where the crystal was shown to lase along its three crystallophysic axes.

TL;DR: In this article, the absorption spectra for Sm3+ ions in zinc and alkali zinc borosulphate glasses at room temperature were presented and the absorption bands responsible for various transitions were assigned and analyzed in terms of a parametrized model Hamiltonian (HFI).

TL;DR: In this article, the secondary laser lines of the Nd3+ ion in crystals like YAG and YAP are used or re-examined very seriously for several purposes.

TL;DR: In this article, the inducing of large circular anisotropy in previously unoriented films of side-chain azobenzene polyesters on illumination with circularly polarized light at a wavelength of 488 nm was reported.

TL;DR: In this article, the potentials of Tm 3+ doped YVO 4 and Y 2 O 3 single crystals for diode-pumped laser emission around the 1.5 μm eye safe laser wavelenght were analyzed.

TL;DR: In this article, the experimental results of absorption, luminescence and excitation spectra in both bare and coated, SnO2 nanocrystals are given, and the experimental data are discussed in terms of the quantum confinement effects and dielectric confinement effects.

TL;DR: In this article, a dependence of the electrooptical coefficient on type and concentration of the dopant has been revealed for Li 2 B 4 O 7 single crystals doped with K and Ag.

TL;DR: In this paper, the authors describe the preparation and characterization of zirconia-based planar waveguides for optical and laser applications, and the possibility of the use of the active waveguide for optical/laser applications is shown.

TL;DR: In this paper, a single beam Z-scan technique was used to measure the third-order nonlinear refractive index, γ, the two-photon absorption coefficient, s, and the variation of refractive indices per unit photoexcited carrier density σ r, and the free carrier absorption cross section σ ab for quantum-confined Fe 2 O 3 nanoparticles coated by a layer of organic molecular in toluene and bare particles in hydrosol.

TL;DR: In this paper, perylimide and pyrromethene dyes were incorporated into glasses prepared by a biphase process and by a one-step process, respectively.

TL;DR: In this article, the nonlinear optical properties of a ferroelectric and ferroelastic β′-Gd2(MoO4)3 laser crystal-host were studied by second harmonic generation (SHG) and stimulated Raman scattering (SRS) experiments using different laser sources for excitation.

TL;DR: In this paper, the effective intensity dependent nonlinear coefficient n 2 of In 2 O 3 nanoparticles with surface modification by Z-scan technique was measured and the optical limiting properties of coated In 2O3 nanoparticles under cw laser illumination were investigated.

TL;DR: In this article, the three new Cr4+ doped matrices studied in this work exhibit only tetrahedrally coordinated lattice sites for the small cations and therefore will not incorporate Cr3+ ions.

TL;DR: In this paper, the spectral properties of Cr 4+ -doped garnets as passive Q-switches for 1.06 μm laser for both pulsed and CW operating modes are addressed.

TL;DR: In this paper, the potentiality of Rutherford backscattering spectrometry to locate ions in laser crystals is tested by studying the case of trivalent rare earth active ions in LiNbO3 crystals.

TL;DR: In this paper, the INFC method was used for the growth of Nd3+-doped double molybdates and tungstates of alkaline yttrium or gadolinium element beloning to the monoclinic structure.

TL;DR: In this paper, the valence state and exact crystal site of incorporated cations are interpreted from the spectral properties of apatites, and the adsorbed species can be revealed only after high temperature diffusion.

TL;DR: In this paper, the lifetime of the 4 I 13 2 level has been analyzed in erbium doped sol-gel planar waveguides as a function of the Er3+ concentration and thermal treatments in the way of testing their potentially for optical amplification at 1.53 μm.

TL;DR: In this article, the optical absorption of various samples of monocrystalline sapphire from various manufacturers, at 1 μm wavelength, was reported, and the lowest observed absorption coefficient was 3.1 ppm/cm comparable to the best optical glass materials.

TL;DR: In this article, the renewal of second order non-linear crystals is very strong in laser materials optics and is involved in the search of new systems based upon the highly nonlinear niobate crystal family.

TL;DR: In this article, the influence of electric of poling conditions on optical nonlinearity of fused silica has been investigated by the second harmonic generation (SHG) technique, and the experimental results have been explained using an electric field induced dipole orientation model.

TL;DR: In this paper, the first laser action in wavelength films of dye-doped sol-gel glass was reported, where Rhodamine B (RB)-doped films were prepared that were pumped by frequency-doubled Nd:YAG laser light focused by means of cylindrical lens.

TL;DR: In this paper, the variation of the concentration-dependent diffusion process with ion exchange temperature from 280°C to 400°C has been investigated in two boro-aluminosilicate glasses suitable for micro-optic applications.

TL;DR: In this article, the upconversion pump mechanism is a combination of cross relaxation energy transfer and non-resonant sequential two-photon absorption, and steady state and time dependent fluorescence measurements are reported, and the energy flow pathway is described.

TL;DR: In this article, the spectroscopic characteristics of triply ionized neodymium in Sr1−xNdxAl12−xMgxO19 for x = 0.03 and 0.15 are presented; one Mg2+ ion per Nd3+ is required for charge compensation.

TL;DR: In this paper, it was shown that γ-irradiation can reduce 100% of U4+ in matrices such as LiYF4, LiYbF4 and β-YF3, but it fails mostly in the fluoride glasses where tetravalent sites are present.

TL;DR: In this paper, the results of measurements of the time evolution of the fluorescences at wavelengths between 400 and 2500 nm, emitted from an optically pumped Tm,Ho:YAG crystal in response to pulsed excitation at 785 nm.

TL;DR: In this article, Nd3+-doped potassium barium aluminum phosphate (KBAP) glasses have been synthesized with a Nd concentration of 4% and characterized for their optical and acousto-optical properties and compared with fused quartz and LiNbO3.

TL;DR: In this paper, the growth and optical properties of PbB 4 O 7, a new host for χ (2) -type nonlinear optical interactions, were reported.

TL;DR: In this paper, the optical properties of GLS thin films deposited by laser ablation technique were investigated as a function of increasing deposition energy density and the optical gap was determined by Taut extrapolation.