Showing papers in "Optical Materials in 1995"

TL;DR: In this paper, the optical properties of the rare elements Tm3+, Ho3+ and Yb3+ were systematically investigated in various glasses for the 3 H 4 → 3 H 6 transition.

TL;DR: The nonlinear optical properties of strontium and lead tetraborate are investigated in this paper, showing that the effective nonlinear coefficient and surface optical damage threshold of the SBO is higher than for any borate crystals.

TL;DR: In this paper, surface level modulations associated with the writing of the Bragg grating were investigated and it was shown that a densification takes place. And the corresponding peak to peak change of the refractive index to be 1.4−1.7 × 10−4 whether a pulsed or a CW irradiation mode is used.

TL;DR: In this paper, a comparison of the growth conditions of SBN crystals in the traditional Czochralski method and new growing technique was carried out, and the advantages of the stepanov technique for growing of pure and doped SBNs are shown.

TL;DR: In this article, a comparison of the growth conditions of SBN crystals in the traditional Czochralski method and new growing technique was carried out, and the advantages of the stepanov technique for growing of pure and doped SBNs are shown.

TL;DR: In this paper, it was shown that the difference in refractive index between the two corresponding ZnO layers most probably results from a difference in package density of the crystal columns.

TL;DR: In this article, the authors studied the effect of green light pulses on the photorefractive LiNbO3:Fe and LiNiO3-Cu with infrared light pulses (wavelength λ = 1064 nm, pulse duration tp = 20 ns).

TL;DR: In this article, the energy level data of Ho 3+ (4f 10 ) in borosulphate glasses as well as the data that are available for 13 Ho: glass systems in the literature are analysed in terms of a parametrized model Hamiltonian that consists of 20 interaction parameters of atomic nature.

TL;DR: In this paper, the performance of a Q-switched Nd:YAG laser using Cr 4+ :YAG as a passive Q -switched was reported, which contained two orders of magnitude more energy than the free running spike.

TL;DR: In this paper, the optical properties of Tm3+ and Ho3+ were investigated in various glasses and the relationship between emission intensity, pumping intensity and dopant concentrations was described using a rate equation model and shows good agreement with experiments.

TL;DR: In this article, surface level modulations associated with writing of grating were investigated and it was shown that a densification takes place which corresponds to a refractive index increase, which accounts for a non-negligible part (7%).

TL;DR: In this article, thin films of CuGaTe2 with thickness in the range, 0.1-1.0 μm were deposited on Corning 7059 glass substrates by flash evaporation.

TL;DR: In this article, the authors measured the index of refraction n(λ) of Zn-doped LiNbO3 grown from a congruent melt as a function of the Zn concentration in the crystal.

TL;DR: In this article, the VUV excitation spectra of the visible luminescence of Tb3+ activated Y3(Alx, Gay)5O12 compounds and their diffuse reflectance spectra are presented.

TL;DR: A review of the nonlinear theory of multiphonon relaxation in the crystal-field approximation and the super-weak electron-phonon coupling limit is presented in this paper.

TL;DR: In this paper, a real-time holographic recording under linear cross-polarized writing beams at 488 nm was performed on two different new azo-dye doped PMMA matrices of 10±1 μ m thick.

TL;DR: Optical absorption, emission and excitation spectra of Ce3+-doped LiYbF4 and LiGdF4 crystals were presented in this paper, where vibrational structures were observed and the vibrational modes were described through Raman spectra.

TL;DR: In this paper, the optical properties of transition metal-phosphine complexes have been measured at 532 nm by degenerate four-wave mixing, and large nonresonant second-order molecular hyperpolarizabilities, γ, have been found for complexes containing two phosphine ligands.

TL;DR: In this article, a photorefractive effect in terbium gallium garnet with refractive index changes up to Δn = 5 × 10−8 for elementary volume phase holograms is reported.

TL;DR: This paper will concentrate on defining the systems requirements that drive material selection and review recent advances in photorefractive materials and techniques that address key issues, including a discussion of multiplexing methods as well as various means to inhibit, or at least manage, destructive writing and reading.

TL;DR: In this paper, a main electron trap at 0.95 eV, connected with V doping, is proposed to be the main deep level involved in the photorefractive effect of CdTe:V on the bases of the σn0 and σp0 ionization cross-sections measurements.

TL;DR: In this paper, a main electron trap at 0.95 eV, connected with V doping, is proposed to be the main deep level involved in the photorefractive effect of CdTe:V on the bases of the σ 0 n and σ p ionization cross-sections measurements.

TL;DR: The results of optical absorption, luminescence, and lifetime measurements on chromium-doped Y 2 SiO 5 and Gd 2SiO 5 crystals were reported in this paper.

TL;DR: In this article, it was shown that γ-irradiation can reduce 100% of U4+ in U3+ in LiYF4, and the conversion efficiency measured from the absorption spectra of the samples is studied as a function of the time of exposure and the uranium concentration.

TL;DR: The role of oxygen in the case of illumination or annealing of thin amorphous chalcogenide films is of considerable importance and should not be neglected as mentioned in this paper.

TL;DR: In this article, a multipeak spectrum in X-ray double diffraction was obtained for CdTe and Cd0.96Zn0.04 ingots, showing that vanadium precipitates are present in the V-rich part of the ingots.

TL;DR: In this paper, the EPR spectrum at 9.205 GHz and at 300 K has been examined for a series of Cr3+ ions doped alkali cadmium borosulphate [RLi,Na,K or Cs] glasses.

TL;DR: In this paper, an optical method is presented which allows to identify at room temperature the photoinduced charge transfers between different defects in photorefractive crystals based on labeling of the optic spectra with the corresponding microscopic defect models, obtained from simultaneously recording light induced ESR and optical absorption changes at low temperatures.

TL;DR: In this paper, electron paramagnetic resonance (EPR) and optical spectroscopy on V-and Ti-doped bulk CdTe is reviewed, showing that both dopants give rise to deep donor levels.

TL;DR: In this paper, the linear and nonlinear optical response of bismuth and antimony implanted fused silica with doses of 6 × 10 16 ions/cm 2 was measured using a Z-scan technique with a mode locked Ti:sapphire laser operating in 140 fs pulse duration at 770 nm wavelength.