Showing papers in "Optics Communications in 1997"

TL;DR: Omega is a 60-terawatt, 60-beam, frequency-tripled Nd:glass laser system designed to perform precision direct-drive inertial-confinement-fusion experiments and the acceptance tests demonstrated exceptional performance throughout the system.

TL;DR: In this paper, the properties of optical parametric amplifiers are presented to show that, in addition to their use in providing tuneable pulses, they can form the critical component in systems generating shorter pulse duration with higher power and intensity than is possible with existing systems.

TL;DR: In this paper, an acousto-optic interaction in an anisotropic birefringent medium was demonstrated to produce a chirped optical signal reproducing an original acoustic signal.

TL;DR: In this article, a new configuration of an optical coherence microscope for high-resolution imaging of biological tissues and other scattering materials is described, which employs multiple sources and detectors combined with high-numerical-aperture optics to suppress speckle fluctuations and enhance resolution.

TL;DR: In this article, a two-stage self-amplified spontaneous emission (SASE) FEL with two undulators and an X-ray monochromator is proposed.

TL;DR: In this article, a method for digital phase imaging is proposed, which requires the measurement of intensity in two adjacent planes orthogonal to the optical axis and the phase is subsequently recovered by a Fast Fourier Transform of the Transport of Intensity Equation.

TL;DR: In this article, up to 100% transmission of a probe field at line center due to electromagnetically induced transparency (EIT) in an optically dense rare-earth crystal of Pr3+ doped Y2SiO5 at 5.5 K was observed.

TL;DR: In this article, a general description of the effects of combined polarization mode dispersion (PMD) and polarization dependent losses (PDL) in single-mode optical fiber networks is presented.

TL;DR: In this paper, it was shown that the excited state lifetime of a fraction of the Yb ions (between 1% and over 90%) is quenched to a very small value, leading to a strong unbleachable loss.

TL;DR: In this article, the authors proposed a linear canonical transform with three free parameters, as opposed to the fractional Fourier transform which has only one free parameter, and the ordinary Fourier transformation which has none.

TL;DR: In this paper, the angular momentum of an elliptical Gaussian beam focussed by a cylindrical lens can be estimated from the azimuthal component of the Poynting vector.

TL;DR: In this paper, it is shown that the statistical character of the measured data can be improved by better taking into account the statistical characteristics of the data, which can be used to improve the non-linear fitting problem.

TL;DR: In this paper, the frequencies of three diode lasers stabilized on the 5 S 1 2 (F = 3)−5 D 5 2(F = 5) two-photon transition in rubidium at λ = 778.1 nm, with an uncertainty of 1 kHz, using BNM-LPTF frequency synthesis chain starting from a CO 2 OsO 4 reference laser at 10.3 μm.

TL;DR: Using cross-phase modulation, the dynamics of the Kerr-like response of air is studied in this article, where spontaneous resurgences of the induced non-linear polarisation are observed, in good agreement with a theoretical model.

TL;DR: In this paper, a differential confocal technique for surface imaging with depth resolution as great as 2 nm is presented. But it uses no interferometric effects, it offers large open-loop dynamic range and is compatible with fluorescence microscopy.

TL;DR: In this paper, an extension of the Gerchberg-Saxton algorithm is used to optimize computer-generated holograms (CGHs) for three-dimensional objects, and optical reconstructions using an electrically addressed twisted-nematic liquid crystal display are presented.

TL;DR: In this article, the first experimental demonstration of an optical trap that uses interference fringes for the trapping and micro-manipulation of microscopic objects is reported, where polystyrene beads of a few microns in diameter can be trapped and held in a bright region of a set of interference flinges and subsequently moved to a designated position by sweeping the fringes across the field of view.

TL;DR: In this paper, the authors proposed a new concept to realize optical cavities with large buildup but broadband response (white-light cavities) using atomic phase coherence, which is useful to improve the bandwidth and sensitivity of future generations of laser interferometric gravitational wave detectors.

TL;DR: In this article, a micro-collimation technique for the output beam of a hollow optical fiber was proposed and demonstrated, and the dark spot size of about 50 μm to 100 μm at the propagation distance Z of 100 mm to 500 mm was obtained.

TL;DR: In this paper, the expressions to calculate integrated absorbances for uniaxial crystals were analyzed mathematically and their direction dependence was formulated and shown by curves based on this analysis, it was proposed that to measure the line strengths for the calculation of effective Judd-ofelt parameters, it is appropriate to measure absorption spectra in three perpendicular directions and average the results (referred to as TPM method)

TL;DR: In this paper, it was shown that sum-frequency generation of light beams with vortices allows to construct vortice of different topological charges, and an optical parametric amplifier enables to produce a vortex with opposite topological charge (to the reverse vortex).

TL;DR: In this paper, the authors examine optical pulse propagation in a transmission system with periodical pulse amplification and dispersion compensation both numerically and by a variational method, and demonstrate that the sign of the residual dispersion is responsible for the stability of the pulse stream.

TL;DR: In this paper, spatial localized structures in degenerate optical parametric oscillators are shown in the form of single localized stripes and of a double-stripe form in case of one spatial dimension.

TL;DR: In this paper, the case of bright solitary wave solutions of the cubic-quintic nonlinear Schrodinger equation is considered in the normal dispersion region of optical fibres and waveguides with third-and fifth-order nonlinearities.

TL;DR: In this paper, a 2D fluorescence lifetime imaging system based on a time-gated image intensifier and a Cr:LiSAF regenerative amplifier was proposed, and the deleterious effects of optical scattering were demonstrated.

TL;DR: In this article, a single laser pulse, of varying linear polarization, is used to transfer population between sublevels of a degenerate atomic level, based on application of the procedure of stimulated Raman adiabatic passage (STIRAP).

TL;DR: In this article, a periodically-poled flux-grown KTP crystal was used for first order quasi-phase matched (QPM) second harmonic generation of a Nd:YAG laser.

TL;DR: In this article, the spectrum of the fluorescent radiation of a single trapped 24 Mg + -ion at low excitation intensity was investigated by heterodyning it with a sideband of the single mode laser radiation used to excite the ion, resulting in a linewidth of 6 Hz.

TL;DR: In this article, a simple and compact all-solid-state green-pulse laser source is described, where a diode-pumped Nd:YAG laser is Q-switched by a GaAs saturable absorber and intra-cavity frequency-doubled by a KTP crystal.

TL;DR: Novel optical memory materials developed for Read Only Memory (ROM) computer storage applications are described and utilization of these ROM materials in 3D optical storage devices, by means of two-photon absorption, is demonstrated.