Showing papers in "Optics Communications in 1987"

TL;DR: In this paper, a new type of solution of the paraxial wave equation is presented, which encompasses as limiting cases both the diffraction-free beam and the gaussian beam.

TL;DR: In this paper, the authors experimentally observed transmission of negative pulses through a single mode optical fiber in conditions where self-phase modulation, due to self induced variations of silica refractive index, may be balanced by the positive group velocity dispersion (dVg/dδ#62;0).

TL;DR: In this article, the authors report the observation of enhanced backscattering and strongly depolarized scattering of light from random rough surfaces, whose height fluctuations obey gaussian statistics, fabricated in photoresist with an aluminium overcoating.

TL;DR: In this article, the authors used fraction gratings in both positive and negative group velocity dispersion configurations to expand and compress an optical pulse, achieving an expansion/compression factor of 1000 times, from 85 fs to 85 ps and back.

TL;DR: In this paper, a nonclassical effect of the square of the field amplitude is defined and shown to be equivalent to the higher-order squeezing defined recently by Hong and Mandel, and it is also shown that the normal squeezing of the harmonic depends directly upon the amplitude-squared squeezing of incident light in the fundamental mode.

TL;DR: In this article, the degenerate four-wave mixing study of 50 A CdS particles embedded in a thin polymer film was performed and the results were qualitatively consistent with the three-level saturable absorber model.

TL;DR: In this paper, the authors reported the generation of 80 fs pulses at 248 nm using a hybrid dye-excimer laser system, which were then amplified in a wide-aperture amplifier to 900 GW peak power.

TL;DR: In this paper, the electromagnetic fields associated with a beam splitter having two input arms and two output arms are quantized in terms of the spatial modes of the complete optical system.

TL;DR: In this paper, the authors evaluate the modes for a Schell-model planar source whose degree of spectral coherence is a Bessel function of zero order and whose optical intensity distribution is an arbitrary circularly symmetric function.

TL;DR: In this article, a selective polarization approach to transient phase grating experiments is presented, where nonlinear signals show not only a temporal behaviour but also symmetry properties associated to each physical process involved, through the polarization states of the four coming beams.

TL;DR: In this paper, the main parameters and limitations of such laser objective for atomic beam microscopy are considered, and the atomic beam can be focused into an angstrom size spot by the action of the gradient force of a laser field having a special configuration.

TL;DR: In this article, the authors derive the unitary transformation that embodies the action of a lossless plane-parallel beam splitter on an incident light beam and illustrate with some examples how fluctuations and noise in one light mode may get coupled with those in another mode.

TL;DR: In this article, the first observation of sub-poissonian photon statistics for light generated by the use of a detection triggered optical shutter in parametric downconversion was reported.

TL;DR: In this article, the solvent-induced shifts of the absorption and emission spectra of 4-dicyanomethylene-2-methyl-6-pdimethyl-amino-styryl- 4H-pyran (DCM) have been studied in a variety of solvents.

TL;DR: In this article, it was demonstrated that source correlations which violate the scaling law produce a normalized spectrum in the far field that is different from the normalized spectrum of the light at the source.

TL;DR: In this article, the state of the optical field at the output of a beam splitter is expressed directly in terms of the state at the input via the diagonal coherent state representation.

TL;DR: In this paper, it was shown that with a degree of spectral coherence of certain kind, specified by two parameters, the spectrum of the emitted light will be displaced relative to the source spectrum.

TL;DR: In this paper, a specially designed excimer laser pumped dye laser system has been used to transform limited pulses of 200-250 fs duration at 308 ns generated by an excimer-piercing laser system with a XeCl gain module.

TL;DR: In this paper, a new technique to read volume holograms at wavelengths different from the wavelength of recording is reported, where the loss of information due to the Bragg condition can be strongly reduced by a proper use of spherical lenses in the read-out beam.

TL;DR: In this article, an intramolecular proton transfer reaction taking place in the initially populated excited state was used to produce tunable stimulated light in the 420-550 nm range from solutions of a number of derivatives of 2-(2 hydroxyphenyl) benzimidazole.

TL;DR: The first measurements of second harmonic generation with multilayer enhancement in non-alternating layer Langmuir/Blodgett films of a hemicyanine dye was reported in this paper.

TL;DR: In this paper, the interaction among coexisting attractors in a laser model with modulated parameters is studied and it is shown that these interactions lead to a deterministic truncation of the period doubling bifuraction sequence and to crises of chaotic attractors.

TL;DR: In this article, the Compton and Raman regimes of a free electron laser are described by a relative hamiltonian which originates the evolution equations for 2 N + 2 canonically conjugate electron and field variables, with the space coordinate as the independent variable.

TL;DR: In this article, the weak probe-field absorption spectrum of a two level atom driven by a coherent pump field in a squeezed vacuum was calculated, where the probe field can show a linewidth smaller than the linear linwidth in normal vacuum.

TL;DR: In this paper, the front surface damage thresholds of fused silica substrates and commercially available fused-silica fibres were measured using XeCl lasers with optical pulse durations in the range 7.5 ns to 300 ns.

TL;DR: In this paper, an Ar + laser driven across the threshold region by a slow variation of the cavity losses displays a delayed bifurcation and easily observable lags relative to the true steady state of the system.

TL;DR: In this article, a non-emolitional measurement scheme to determine the photon number was realized using an optical fiber as the optical Kerr medium, and the φ (3) value of an optical fibre for the optical kinematic effect was measured using this scheme.

TL;DR: In this article, the trade-offs between switching efficiency, throughput, switching power and linewidth detuning for a nonlinear directional coupler with a two level saturable nonlinear medium were investigated.

TL;DR: In this paper, a Lyot filter and a thin etalon were used to tune the LNA laser output to the resonance transition of helium-4 (23S1-23P1) at 1.083 μm.

TL;DR: In this article, the authors show that ordinary coherent light interacting with a non-absorbing nonlinear medium modelled as an anharmonic oscillator gives rise to enhanced and reduced phase fluctuations as well as squeezing.