Showing papers in "Optics Communications in 1970"

TL;DR: Laser action on six rotational transitions grouped in pairs near 452, 496 and 541 μm has been observed in methyl fluoride gas which is optically pumped by a Q-switched CO 2 laser as discussed by the authors.

TL;DR: The elastic constants of SbSI in the neighbourhood of the ferroelectric transition have been determined from high resolution backscattering measurements using a double-passed, fully stabilised, scanning Fabry-Perot interferometer as mentioned in this paper.

TL;DR: In this paper, a simple geometrical representation is introduced which yields the accessible domain of spatial frequencies for a restricted choice of directions of incidence of coherent illumination, and an analytical method to perform the complete reconstruction is given.

TL;DR: In this article, a transient hologram has been produced in Si with a Q-switched Nd:YAG laser in the form of a spatially modulated free carrier pattern.

TL;DR: In this paper, the first Raman study employing a UV laser was performed and multiphonon zone center scattering processes were observed, as well as resonance with the scattered photon.

TL;DR: In this paper, the frequencies, wave numbers, and wavelengths of 120 CO2 laser lines calculated on the basis of recent absolute frequency measurements in the 9.3 μm and 10.6 μm regions and the previously determined accurate rotational constants are presented.

TL;DR: In this article, a single mode TE or TM propagation is demonstrated in an optical waveguide consisting of a high resistivity semiconductor (GaAs) layer (≈ 10 μ) which is sandwiched between a metal film and a lower resistor semiconductor.

TL;DR: In this paper, fast rising high voltage pulses produced by a pressurized spark gap are used to actuate a Kerr cell, which provides accurate synchronization with the laser radiation, and is used to detect laser induced gas breakdown.

TL;DR: A technique employing coded grids in order to spatially modulate regions where changes occur to allow rapid subtraction of two-dimensional information formats or rapid extraction of changes which occur between successive frames of information is described.

TL;DR: In this article, the authors show that the mutual intensity in the image is related in a simple way to the autocorrelation of the diffuser, and the experimental conditions necessary for equivalence are determined.

TL;DR: In this paper, the effect of stimulated Raman excitation of the v = 1 J = 1 level of normal H 2 has been studied at 300°K by optical scattering techniques.

TL;DR: In this article, the interaction of intense picosecond pulses with electro-optic crystals is investigated, with particular emphasis upon the resultant self-induced optical phase distortion, and an observable spectral broadening of the optical field is predicted for propagation in GaAs.

TL;DR: In this paper, a short (30 μm) saturable absorber cell in contact with one of the cavity mirrors of an Nd:glass laser was found to be the optimum configuration for the production of short (2.5 - 8 psec) mode-locked pulses.

TL;DR: A simplified approach to integrating sphere theory with a wall mounted sample is presented in this article, where a simplified approach is used to integrate sphere theory and wall mounted samples. But this approach is not suitable for indoor applications.

TL;DR: In this article, the optical and electrical properties of thin films of amorphous germanium are investigated as a function of the conditions of deposition, and the results are compared with the results of annealing experiments and interpreted in terms of varying amounts of imperfections.

TL;DR: In this article, the energy, pulse duration and frequency width of single picosecond pulses switched out from a train of mode-locked pulses (produced by an Nd-glass laser) were studied.

TL;DR: In this paper, the complex dielectric tensor elements ϵ(ω) and ϵ⊥ (ω) for the electric field vector parallel and perpendicular to the c axis of MoS2 are derived from the energy loss spectra of 60 keV electrons by means of a Kramers-Kronig analysis.

TL;DR: The Ewald-Oseen extinction theorem is derived in a new and general form that is applicable to any medium as discussed by the authors, and the usual form of the extinction theorem appears as a special case of the general formulation.

TL;DR: In this paper, the divergence of the electric field vanishes in a certain class of configurations of self-trapped "filaments" with transverse electric (TE), transverse magnetic (TM), or hybrid (HE and EH) field configurations.

TL;DR: In this paper, an experimental arrangement for pattern recognition by means of holography, which uses an electron beam-addressed crystal of deuterated KDP (KD 2 PO 4 ) as an input device, was described.

TL;DR: In this paper, the reflectance of solid Kr and Xe has been measured at temperatures below 40°K for an angle of incidence of 15° and photon energies between 8 and 25 eV using the continuous spectrum of the synchrotron radiation of DESY.

TL;DR: In this article, the influence of superficial layers on the plasma resonance emission produced on silver surfaces is studied as function of the dielectric constant and thickness of the surface films, and very thin tarnishing films can be detected in this way.

TL;DR: In this article, a new method to investigate the diffraction of an electromagnetic wave by a grating of infinite conductivity is given, based on a convenient conformal mapping, which leads to a general discussion of the validity of the Rayleigh expansion.

TL;DR: In this paper, the effects of quenching of two-photon fluorescence in Rhodamine 6G and 9, 10, 10-diphenylanthracene in measurements of picosecond pulse durations are discussed and a separate experimental demonstration is described.

TL;DR: In this paper, Zeeman splittings are used to compensate spectroscopic isotope shifts in the resonance frequencies of different atoms for level crossing effects in forward-scattering.

TL;DR: In this article, a quantitative comparison of experimental results on the frequency dependence of the intensity of single LO phonon Stokes Raman scattering in CdS, and theoretical predictions based upon Bloch, exciton, and single and two branch undamped polariton mechanisms is presented.

TL;DR: In this article, a report is given on some experiments with simple grating-like objects showing how this information can be utilized to form magnified images with superresolution, which can be used for image super-resolution.

TL;DR: In this article, a method of optical contouring and a technique of making moire topographical maps of objects is described, where two gratings are imaged on the tested object by means of two projectors and the moire is produced.

TL;DR: In this paper, explicit expressions for the two-photon interband transition rate in a magnetic field were derived for the inter-inter and intra-intra transitions, respectively.

TL;DR: In this article, the scalar dipole field is evaluated numerically in the homogeneous wave-field approximation for which all evanescent plane waves in its angular spectrum are discarded, and it is found that the fields are essentially identical outside a region the order of one wave-length from the plane containing the dipole.