Showing papers in "Optical Materials in 2002"

TL;DR: In this paper, a transparent oxyfluoride glass ceramics containing LaF3 and ErF3 was prepared and the fluorescent characteristics of Er3+, such as emission spectra and lifetime of excited states were investigated.

TL;DR: In this article, Nd-doped YAG (Y3Al5O12) ceramics that contained from 1.1 to 4.8 at.% Nd additives and exhibited nearly the same optical properties as those of a single crystal was fabricated by a solid-state reaction method using high-purity powders.

TL;DR: In this article, the optical properties of amorphous and annealed chalcogenide films were investigated using spectrophotometric measurements of the transmittance and reflectance at normal incidence in the wavelength range 250-2500 nm.

TL;DR: In this article, the luminescence and upconversion spectra of nanocrystalline and bulk Lu1.98Er0.02O3 samples were investigated and it was shown that up-conversion occurs via a sequential absorption of three photons and via a phonon-assisted energy transfer (PET) process, with the latter being more efficient at higher Er3+ concentrations.

TL;DR: In this paper, the formation process of YAG and YAG:Eu powder phosphors was investigated by means of XRD, TG-DTA and FT-IR spectra.

TL;DR: In this paper, the first diode-pumped laser experiments with ytterbium-doped lutetia have been conducted by the Bridgman method.

TL;DR: In this paper, the authors measured the absorption and emission spectra of Cr, Co, Eu and Dy ions in Li2B4O7 glasses melted in oxygen and hydrogen for valency states analysis.

TL;DR: In this paper, a very dense europium-doped gadolinium oxide films were obtained with a thickness of 390 nm and a refractive index of 1.88 at 632.8 nm.

TL;DR: In this paper, the optical properties of Nd3+, Sm3+ and Dy3+ in bismuth borate glasses, with Bi2O3 content varying from 30 to 60 mol%.

TL;DR: In this article, the results of spectroscopy and laser action of disordered calcium niobium gallium (CNGG) and calcium lithium nibium nigerium gold (CLNGG)- garnets doped with Nd3+, Eu3+, Er3+, Ho3+ and Tm3+ were displayed.

TL;DR: Optical absorption and paramagnetic resonance spectra of X-ray irradiated (λCuKα=0.154 nm) ultra-and metaphosphate glasses of high purity were studied in this article.

TL;DR: In this paper, a tellurite-based glass composition for use in EDFAs exhibits higher phonon energy without sacrificing optical, thermal or chemical durability properties, and the introduction of boron oxide (B2O3) into the Er3+-doped tellurites has been shown to enhance thermal stability and particularly the chemical durability of the boro-tellurite glasses.

TL;DR: In this paper, the relation between the bulk laser-induced damage threshold (LIDT), dislocation density and UV absorption of CsLiB6O10 (CLBO) was investigated.

TL;DR: In this paper, the vertical Bridgman method was used to grow colorless and crack-free single crystals of bismuth silicate (Bi4Si3O12, BSO) scintillators.

TL;DR: In this paper, the temperature-induced change in the index of refraction (n) and extinction coefficient (k) were successfully determined from reflection spectra for a wavelength range between 600 and 1050 nm.

TL;DR: In this paper, the diffuse reflection, excitation and emission spectra of Ca8Mg(SiO4)4Cl2:Ce3+,Eu2+ were measured at room temperature, and enhancement of Eu2+) emission was confirmed.

TL;DR: In this article, the free-running performance of both rod and disk Yb:YAG microlaser is characterized and experimental parameters such as gain and loss are evaluated, together with the value of the stimulated emission cross-section, e.g. σ em = 3.3×10 −20 cm 2.

TL;DR: In this paper, the first optical nonlinear crystalline dot formation by YAG laser irradiation in bismuth-containing glasses was reported, and it was found that these crystalline dots generated optical SH waves.

TL;DR: In this article, a tunable single-axial mode oscillation was demonstrated in a diode-pumped 400 μm thick Yb:YAG microchip green laser with 250 mW CW output power, which emitted maximum green power of 520 mW.

TL;DR: In this paper, the laser-nonlinear optical crystal Er:Yb:YCa 4 O(BO 3 ) 3 operated at room temperature, and pumped by a 976 nm diode, achieved a tunable range of 23 nm (1535-1558 nm) with a 50 μm etalon.

TL;DR: In this article, a new recorder material is reported, the Norland Optical Adhesive NOA 65 ®, composite by acrylate monomer with mercapto-ester; these adhesives can be applied easily for any substrates such as plastics or glasses without dark room and critical conditions.

TL;DR: In this article, the authors explore two different directions in the investigation of Yb-doped solid-state laser crystals, and discuss the problem of evaluating the laser potential of the known Ybbased lasers.

TL;DR: In this paper, the influence of Tb3+ ions on X-ray-induced defects has been examined in glasses with different phosphate contents, and the defects have been characterized by optical absorption and ESR spectroscopy.

TL;DR: In this paper, the application of the Brewster angle technique and a genetic algorithm for the measurements of refractive index and thickness in tetragonal ZrO 2 :Er 3+ and Zr O 2 −SiO 2 films prepared by the sol-gel process and dip-coating technique annealed at 550°C is reported.

TL;DR: In this paper, a three-peak Gauss fitting for the luminescence lineshape of Cr4+:alumino-silicate glass at low temperatures has been demonstrated for the first time.

TL;DR: The p-type conduction in transparent ZnO films grown by electron cyclotron resonance (ECR) N2O plasma-enhanced pulsed laser reactive deposition has been induced by incorporating active N radical species created in N 2O plasma within the ZnOs as mentioned in this paper.

TL;DR: In this paper, the evolution of the crystalline structure as a function of the annealing temperature and rare earth concentration of doped and undoped samples were investigated by X-ray diffraction.

TL;DR: In this article, a connection between the high-resolution spectral disordering of rare earth-doped garnets and the manifestation of the energy transfer in the global or selective emission decay is discussed.

TL;DR: In this article, thin films of zinc oxide (ZnO) were prepared by dc reactive magnetron sputtering on glass substrates at various oxygen partial pressures in the range 1 x 10(-4)-6 x 10 (-3) mbar and substrate temperatures in range 548-723 K. The films were polycrystalline with wurtzite structure.

TL;DR: In this paper, a large, optical-quality bismuth molybdate Bi 2 (MoO 4 ) 3 single crystals are grown by the Czochralski method from a stoichiometric melts and principal refractive indices n x, n y and n z are measured using the classic method of minimum angle of deviation in the visible region of the spectrum.