Showing papers in "Optics Communications in 1995"

TL;DR: In this paper, the diffraction tomography theorem is adapted to one-dimensional length measurement and the resulting spectral interferometry technique is described and the first length measurements using this technique on a model eye and on a human eye in vivo are presented.

TL;DR: In this paper, the authors describe a compact, economic and versatile diode laser system based on commercial laser diodes, optically stabilized by means of feedback from a diffraction grating, which offers singlemode operation with a linewidth of a few 100 kHz, continuous scans over 25 GHz, high chirp rates (up to 9 GHz/ms) and FM-modulation up to the GHz range.

TL;DR: In this article, a Ti:sapphire laser was used to ablate holes with a diameter of 300 nm and a depth of 52 nm to produce very small features in materials.

TL;DR: In this article, it was shown that the rotation of the Poynting vector of a Laguerre-Gaussian laser mode is proportional to the Gouy phase and for most cases of interest, rotates through less than one revolution in reaching the far field.

TL;DR: In this article, the authors analyzed screw, edge and mixed screw-edge dislocations in monochromatic light waves and derived the topological charge value and helicity of screw dislocation.

TL;DR: In this paper, the interference field produced by a periodic mask and the near-field energy density and fluence distribution for varying degrees of order content when exposed using an excimer laser with finite spatial and temporal coherence were analyzed.

TL;DR: Optical limiting and stabilization via two-photon absorption (TPA) in organic molecule-doped solid materials have been investigated in this paper, and the measured results can be well fitted based on the assumption that TPA is the predominant mechanism producing the observed optical limiting behavior.

TL;DR: In this article, the first time diode pumped room temperature cw laser action around 1.6 μm in Er3+-doped Y3Al5O12 (YAG) and Y2SiO5 (YSO) with Yb3+codoping was reported.

TL;DR: In this article, the authors used the decrease in laser intensity induced by two-photon absorption as the means for reading 3D information for accessing information from 2D volume memory devices.

TL;DR: In this article, the authors derived new dispersion relationships for the entire transparency region of ϵ-GaSe based on numerous linear and nonlinear-optical measurements performed by other authors as well as in their group.

TL;DR: In this paper, the spatial contrast of a time-integrated speckle pattern depends on the velocity of the scatterers producing the speckles, and a digital realization of this technique was considered, replacing the original two-stage optical processing with quasi real-time digital processing.

TL;DR: In this paper, a comparison of light propagation simulation methods in the Fresnel region is presented, based on the Kirchhof scalar theory of diffraction, and the simulated results are verified in an experimental optical setup.

TL;DR: In this paper, the same rules can be applied to create a new type of fractional-order Fourier transform which results in a smooth transition of a function when transformed between the real and Fourier spaces.

TL;DR: In this article, an evanescent light wave formed on the surface of a pyramidal hollow in a glass substrate is used to trap alkali atoms and keep them in their lower hyperfine ground state by a weak repumping laser beam.

TL;DR: In this paper, the authors considered the collection efficiency for photons emitted by a single molecule in a solid excited by monochromatic light at low temperature, which depends upon the dipole radiation pattern, the orientation of the emission dipole, total internal reflection, and the numerical aperture of the collecting optics.

TL;DR: In this paper, the self-deflection process of bright spatial solitons in biased photorefractive media is investigated by taking into account diffusion effects, and it is found that the soliton beam evolution is approximately adiabatic.

TL;DR: In this paper, a variational formalism for dark solitons based on a modification of the standard Lagrangian of the nonlinear Schrodinger equation is proposed, which allows to consider a variety of asymptotically nonvanishing localised solutions for applying a VAE together with the correct definition of momentum and energy.

TL;DR: In this paper, a fast and accurate method for the measurement of the nonlinear refractive index of transparent materials is presented, applied to various solids and liquids, and the effective femtosecond response time of the optical Kerr effect in benzene and methanol is determined.

TL;DR: In this article, the power scaling of diode-pumped monolithic Nd:YAG ring laser to a single-frequency output power of nearly 2 W in cw operation is demonstrated by using a new ring laser design and applying four 1 W diode lasers.

TL;DR: In this paper, a fiber-optic four-detector polarimeter (FO-FDP) is presented, which consists of four externally induced incore fiber gratings together with four photodetectors.

TL;DR: In this paper, the harmonic generation from solid Al targets irradiated at intensities of 1017 W/cm2 using a tabletop Ti:sapphire terawatt laser system is reported.

TL;DR: In this article, the laser-like effects in rhodamine 6G laser dye were observed both in dilute and concentrated dye with and without scatterers, and the wavelength of stimulated emission was strongly dependent on the scatterer's concentration.

TL;DR: The behavior of the kurtosis parameter of a partially coherent beam that freely propagates is investigated in this paper, where a general classification scheme of light beams is given in terms of the number of extremals of the Kurtosis in free space.

TL;DR: In this article, a numerical simulation is used to calculate the signal detected by a photon scanning tunneling microscope when scanning a surface, and it is shown that the signal provides an image very different from the actual surface profile.

TL;DR: In this paper, the dynamical evolution of bright spatial solitons in biased photorefractive crystals is investigated under steady-state conditions, and the effect of the external bias field on the self-focusing behavior of optical beams is discussed.

TL;DR: In this paper, the global attenuation and the global PDL may fluctuate in systems containing several elements with polarization dependent losses (PDL) connected by standard optical fibers, and the corresponding statistics are investigated.

TL;DR: In this article, the authors solved the problem of the transmission of time modulated signals in a two-beam coupling photorefractive set-up using an absorbing material and obtained an analytical expression that describes this phenomenon in absence of pump beam depletion due to beam coupling.

TL;DR: In this paper, the propagation effects of high-order harmonic generation of high intensity sub-picosecond KrF laser radiation (6 × 10 15 W/cm 2 ) in carbon vapor and low charged carbon plasma are studied.

TL;DR: In this article, an associate field formalism based on an expansion to the inverse scattering transform is applied to the problem of optical soliton pulse propagation perturbed by third order dispersion, which provides an almost complete description of the origin, growth and structure in time and frequency of the radiation emitted by and changes to the soliton pulses.

TL;DR: In this article, a set of annular binary pupil filters for increasing the axial resolving capacity of imaging systems is presented, which consist of two transparent annuli of the same area.