Showing papers in "Optics Communications in 1999"

TL;DR: In this paper, the refractive index, birefringence and their dispersions are analyzed accurately in a physically meaningful model of a dispersion equation having only five coefficients for the calcite and quartz crystals.

TL;DR: In this paper, the modes of a comb of optical frequencies emitted by a mode-locked femtosecond-laser were stabilized and used as a ruler to measure differences of up to 45.2 THz between laser frequencies in a new type of frequency chain.

TL;DR: In this article, permanent birefringent structures with controllable microscopic dimensions are inscribed in pure fused silica platelets, and the bireringence properties of transmission gratings and of a quasi-uniform layer have been established.

TL;DR: A fast algorithm based on the Fractional Fourier transform allow accurate evaluation of the Fresnel integral from object to Fraunhofer domain in a single step.

TL;DR: It is shown that a simple process such as multiple repetition of an anisotropic sine/cosine average filter produces the effect of an excellent automatic adaptive filter for filtering speckle-interferometric phase fringe patterns.

TL;DR: The dynamics and bifurcations of a single-mode semiconductor laser with optical injection, modeled by three-dimensional rate equations, are presented, to the best knowledge, yet, of the dynamics of injected semiconductor lasers.

TL;DR: In this article, the spectral characteristics in the near zone when a certain class of partially coherent light is incident on a circular aperture were investigated within the Fresnel approximation, and it was shown that, as the distance z between the aperture and the on-axis observation point decreases, the spectral shifts show gradual change.

TL;DR: In this article, the performance of a cylindrical-lens mode converter for transforming Hermite-Gaussian into LaguerreGaussian modes is analyzed using a beam propagation program.

TL;DR: In this article, a semi-empirical model capable of predicting the rate of tunnel ionization of N 2 and O 2 molecules interacting with strong Ti:sapphire laser pulses is derived.

TL;DR: In this article, the dependence of the intensity of a focused Ti:Sapphire laser pulse in air on the propagation distance was studied by measuring the photo-emission spectrum of N 2 and N 2 +.

TL;DR: In this article, a multi-wavelength erbium-doped fiber ring laser is proposed and demonstrated using a dual-pass Mach-Zehnder (M-Z) interferometer fiber device as a comb filter inside the fiber laser cavity.

TL;DR: In this article, a detailed study of the propagation properties of cosh-Gaussian (ChG) beams has been made, where the passage of ChG beams through a first-order paraxial optical ABCD system has been expressed in closed forms for both unapertured and apertured cases.

TL;DR: In this article, a linear closed-form solution to the inverse problem of three-dimensional reconstruction of the index of refraction of a phase object from phase-contrast intensity measurements obtained with the use of a synchrotron X-ray source is considered.

TL;DR: In this article, an axicon is used to generate a Bessel beam at 90 GHz in the millimetre-wave region of the spectrum, which is maintained over a propagation distance greater than 60 mm.

TL;DR: In this article, room temperature CW laser action of Yb 3+ -doped InGaAs laser diode at 1026-1044 nm has been demonstrated under pumping by 980 nm fiber-coupled InGAAs laser diodes.

TL;DR: In this article, the angular emission of light of wavelength 710 and 810 nm from a gold diffraction grating was studied at about 700°C and a peak in the emission was found for defined angles.

TL;DR: In this paper, a family of annular binary filters for improving the three-dimensional resolving power of optical systems is presented, whose most important feature is their simplicity, which permits to achieve a significant reduction in the central lobe width of the irradiance point spread function of the system.

TL;DR: In this article, an optical system based on digital holographic interferometry for shape measurement of microscopic objects is described, where two separate lensless digital holograms of an object under test are recorded on a CCD faceplate.

TL;DR: In this paper, the results of angle-dependent reflectance measurements on photovoltaic materials and solar cells are presented and discussed and the optical apparatus employs an integrating sphere of 40 cm diameter and it is suitable for working at variable wavelengths and incidence angles of the light beam.

TL;DR: In this article, it was shown that a degenerate critical point can decay explosively into a large number of irreducible (nondegenerate) components, and that this explosion may trigger a chain reaction that fragments other aspects of the wave field.

TL;DR: In this paper, the Yamada model for self-pulsations in (semiconductor) lasers with saturable absorber is considered and a complete picture of all possible dynamics is presented in terms of two-dimensional bifurcation diagrams, in which they find a Bogdanov-takens bifurycation as an organizing center.

TL;DR: In this article, a novel chemical or surrounding refractive index sensing scheme based on the measurement of the separation of the dual resonant peaks in a long-period fiber grating with a period of 100 μm is demonstrated.

TL;DR: In this article, the authors find a stimulated emission regime, which is characterized by highly efficient, directional laser-like emission and a complex finely structured spectrum, which can be interpreted as an onset of multimode, mirrorless laser oscillations that occur outside the photonic crystal stop bands.

TL;DR: In this paper, the authors report on the stimulated formation of soliton pulses in a passively mode-locked fiber soliton laser and show that the mechanism for the soliton pulse generation is a soliton shaping of dispersive waves in the laser.

TL;DR: In this article, a layer of low refractive index, sandwiched between two multilayer stacks made from commonly used dielectric materials, was designed to be completely free of all modes within a band of frequencies, i.e., to support a species of full photonic bandgap.

TL;DR: In this article, the influence of the tip and surface curvature and tip-surface interaction on the detected optical signal is discussed for scattering apertureless and nonlinear optical experiments with scanning near-field microscopy for which the field enhancement and tip surface interaction result in a strong dependence of the signal on the details of surface topography.

TL;DR: An all-optical pseudorandom binary number generator comprised of two coupled regenerative optical memories and an XOR gate is demonstrated.

TL;DR: In this paper, a novel setup for investigations in cavity quantum electrodynamics is described, which combines an optical microcavity (finesse 4.3×105) with an atomic 85Rb fountain, allowing full control over density and velocity of atoms entering the optical cavity.

TL;DR: In this article, the authors demonstrate an all-optical digital processing circuit that can perform the full addition of binary optical words, using two coupled alloptical regenerative memories.

TL;DR: In this article, a new detection scheme for pump-probe and four-wave mixing heterodyne experiments, using balanced detection and a dual-phase lock-in for spectral filtering, was demonstrated on an InGaAsP/InP bulk optical amplifier.