Showing papers in "Optical Materials in 2003"

TL;DR: In this paper, the combined case of self-trapping and self-quenching in the lifetime analysis of Yb, Er, and Ho doped Y 2 O 3 single crystal fiber is studied.

TL;DR: In this paper, the spectroscopic properties of Al2O3 waveguides ion implanted with Er3+ and Yb3+ are investigated in view of their application in optical amplifiers operating at 1530 nm.

TL;DR: In this paper, the authors investigated the optical transitions of Er 3þ ion in two tellurite glasses of molar composition 75TeO2:12ZnO:10Na2O:2PbO:1Er2O3 and 75Te

TL;DR: In this article, a diode-pumped ytterbium-doped Gd 3 Ga 5 O 12 (Yb:GGG) laser was reported, achieving up to 4.2 W of CW power when pumping on the 971 nm absorption band with a 14 W fiber-coupled diode.

TL;DR: In this article, surface modified CdO nanoparticles in the size range of 5-10 nm were prepared by a microemulsion method and showed strong emission peaks mainly centered at ∼400 or ∼460 nm, depending on the particles' size.

TL;DR: In this article, a Pechini sol-gel process combined with a soft lithography was used to obtain homogeneous and defects-free patterned gel and crystalline phosphor films with different stripe widths.

TL;DR: In this article, a Tm doped ZBLAN glass is investigated to obtain a laser emission near 1.8 μm instead of classical crystalline host materials, and a brief description of the basic optical properties of this glass is presented.

TL;DR: In this paper, the authors discuss the advantages of the solution Z-scan technique, eg the possibility of in situ studies of electrochemical switching of third-order nonlinearity, and problems encountered on the interpretation of the results.

TL;DR: In this paper, the second and third-order optical nonlinearities of L-threonine amino acid crystals grown from aqueous solution are investigated, and the absorption spectra indicate a good transparency between 250 and 1500 nm.

TL;DR: In this article, single-walled carbon nanotubes (SWCNTs) were synthesized by the laser ablation method and dispersed with the hole conducting polymer PVK in toluene.

TL;DR: In this article, the spectral and luminescence characteristics of Nd3+ ions in SrWO4 Raman crystals are presented, and optimal conditions to obtain optically homogeneous single crystals free of light scattering centers and growth striations are found.

TL;DR: In this paper, the optical properties of excitonic recombinations in bulk ZnO are investigated by photoluminescence (PL) measurements, where the neutral donor bound excitons are positioned at 3.364, 3.362 and 3.361 eV.

TL;DR: In this paper, a two-dimensional liquid crystal microlens array using a surface relief structure of ultraviolet (UV) curable polymer was fabricated using a photomask, which is produced by the spatially modulated UV exposure of the polymer through a photOMask.

TL;DR: In this paper, the spectral absorption and fluorescence characteristics of Cr,Ca:YAG crystals following different thermal treatment procedures were resolved into different peaks, of modified Lorentzian line-shape.

TL;DR: In this article, the authors used FT-IR spectroscopy for study of domestic Iron Age storage jars excavated at Tel Hadar on the eastern shore of the Sea of Galilee.

TL;DR: In this paper, the authors show that the energy transfer from the host to Eu3+ was very weak in ZnO:1%Eu2O3,Li.

TL;DR: In this article, the frequency-dependent properties of organic diodes with a pentacene/aluminum Sckottky contact have been investigated, and it was revealed that the frequency dependent properties are related to the localized traps in the band gap of pentaene.

TL;DR: In this article, an approach to overcome this problem by stacking of optical single-mode waveguides using successive UV photolithography using the material system of hybrid inorganic-organic polymers (ORMOCER®s) is presented.

TL;DR: In this paper, the authors developed a cesium lithium borate CsLiB 6 O 10 (CLBO) crystal, which is a novel nonlinear optical borate crystal suitable for ultraviolet (UV) light generation.

TL;DR: In this paper, a discussion of the spectroscopic properties of the low-phonon energy laser host material, KPb 2 Cl 5, doped with trivalent erbium is presented.

TL;DR: In this paper, the photoluminescence (PL) spectra of ZnS nanoparticles co-doped with Ni2+ and Mn2+ were analyzed.

TL;DR: In this paper, single crystals of Pr(PO3)3 polyphosphate and NaPrP2O7 diphosphate were grown for the first time using the flux method.

TL;DR: In this article, organic electro-optic (EO) materials have been presented that exhibit EO coefficients in the range of 60-100 pm/V at the telecommunications wavelengths of 1.3 and 1.55 μm.

TL;DR: In this article, the crystal orientation dependence of the piezoelectric properties has been calculated phenomenologically for LiNbO3 and LiTaO3 in three-dimensional space by means of coordinate transformations.

TL;DR: In this paper, the dependence of the intensity of upconversion emission on the Tm3+ and Yb3+ concentration has been studied in order to determine the optimum ion concentrations and the involved mechanisms.

TL;DR: In this paper, a three-level model was used to explain the nature of the charging curve of the long persistent materials and found that the excitation spectra depend on the intensity of the light source and the scanning speed of the measurement.

TL;DR: In this article, the spectral properties of P 2 O 5 ·Na 2 O·SrO·Al 2 O 3 ·Yb 2 O 4 ·Er 3+, Yb 3+ :phosphate glass were studied.

TL;DR: In this paper, three Yb3+-doped scandium based materials are elaborated and their optical properties investigated using a simple overlap model, and the energy level diagrams for Yb:CaSc2O4, Yb :SrSc2 O4, and yb:Sc2SiO5 are determined through optical spectroscopic analysis and semi-empirical crystal-field calculations using the simple overlap models.

TL;DR: In this paper, it was shown that magnitudes of the Kerr coefficient and permittivity of 19Na2O·Nb2O5 glasses correlate with the content of the Na2O ·Nb 2O5 groupings, with that content being estimated by Raman scattering data.

TL;DR: In this article, the authors synthesized chalcone derivatives and introduced them as a side chain unit in the backbone of polyimide for photo-alignment layers, and found that the alignment properties are very much dependent on the chain length.