Showing papers in "Optics Communications in 1973"

TL;DR: In this article, the opto- or photo-acoustic effect used in gas analysis has been extended to the study of solids, providing a simple method for obtaining information about optical absorptions and subsequent de-excitations in solids.

TL;DR: In this article, the modification of fluorescence lifetimes due to the presence of mirrors is discussed using an image method and the close analogy of this system with that of many-atom cooperative decay is exploited and discussed.

TL;DR: In this article, the diffraction of a plane electromagnetic wave by a photoresist grating lying on a dielectric optical guide was studied and the sharp resonances were found to correspond with the existence of modes in the optical guide.

TL;DR: In this article, an ellipsometry technique based upon on-line Fourier analysis of the transmitted light intensity of a rotating-analyzer ellipsometer by means of a minicomputer is presented and discussed.

TL;DR: In this article, a new interpretation of previous experimental results on frequency superbroadening is presented, where the temporal and spatial variations in the index of refraction due to electron plasma formation contribute significantly to the processes of self-phase modulation.

TL;DR: In this article, the electromagnetic field in grating coupler-waveguide systems is determined using a rigorous formalism, developed for the case of TE polarization (E parallel to the grooves of the grating), is here extended to the TM case (H parallel to a groove).

TL;DR: In this paper, the absolute nonlinear coefficient for AgGaSe 2 by phasematched second harmonic generation was measured and the measured value is d 36 = (3.24 ± 0.50) × 10 −11 m/V.

TL;DR: In this paper, the theory of transient mode-locking for an active modulator in a laser with a homogeneously broadened line is presented and applied to simultaneously Q-switched and mode-locked Nd:YAG lasers and good agreement between theory and experiment is obtained.

TL;DR: In this article, a dual frequency method interpolates the fringe pattern of any kind of hologram interfermetry down to better than 1 100 of a fringe, independent of intensity variations.

TL;DR: In this paper, the coupled-mode formalism is used to describe the behavior of a corrugated dielectric waveguide and explicit expressions for the dispersion near the Bragg regime are given.

TL;DR: The equivalence with the Shannon number is shown to hold with a great generality and the problem of the determination of the number of significant degrees of freedom of an image is considered.

TL;DR: In this article, a new dispersion formula which corroborates with the oscillator strength values found in the literature was proposed and compared with those obtained by extrapolation of dispersion formulae proposed by other authors and those calculated from their dispersion formulas.

TL;DR: In this paper, the average indices of refraction of pure ZnS, ZnSe and ZnTe at 2, 80, and 300°K were measured in the spectral region from 10 to 100 cm -1.

TL;DR: In this article, a normal vibrational mode of a binary liquids is strongly excited and the relaxation via energy transfer to a normal mode of component B is studied on a time scale of several 10 −12 seconds.

TL;DR: In this article, a method for measuring star diameters with very high precision in spite of the turbulent atmosphere was proposed and verified by model experiments, and this method can be used to obtain star maps.

TL;DR: In this paper, a formula for the efficiency of coupling of electromagnetic energy between dielectric waveguides which, in the absence of coupling, have unequal guided-mode propagation constants is derived.

TL;DR: In this article, a continuous and quasi-continuous operation of an organic dye laser was achieved with eight coumarin dyes in the wavelength region 420 to 585 nm.

TL;DR: In this paper, a ruby laser beam mixed in AgGaS 2 with the output of various ruby-pumped dye lasers has provided down-converted infrared radiation tuned from 4.6 to 12 μm.

TL;DR: In this article, a small pulsed CO2 laser has been used to optically pump gaseous formic acid, ethyl fluoride and ozone as well as other molecules previously know to lase.

TL;DR: In this article, the authors suggest that a recent method of stellar interferometry developed by Labeyrie and his colleagues may be used to obtain diffraction-limited resolution from telescopes whose aberrations are poor by conventional standards.

TL;DR: In this paper, the authors used a streak-camera to measure 1 mJ pulses at the beginning of the pulse train of a mode-locked Nd: glass laser, with self-phase modulation frequency broadening at the end of the train.

TL;DR: In this paper, the absolute wavenumbers of the 2 − 0 vibration-rotation band of 12 C 16 O have been measured at Laboratoire Aime Cotton, in direct reference to krypton-86 line standard with the High Information Fourier Interferometer operating now in vacuum.

TL;DR: In this article, numerical solutions of the mode equation of planar dielectric waveguides are discussed, and it is shown that the required accuracy of the computer must be high to obtain exact results.

TL;DR: In this paper, the use of a special geometrical configuration allowing high efficiency coupling to thin film optical waveguides using thin grating couplers is described, and experimental coupling efficiencies of 70% are reported.

TL;DR: In this article, it was shown that if an off-axis Fresnel hologram is formed on a spherical surface the hologram as a lens will be aplanatic if the position of the reference and object points satisfy the condition ( l ′) −1 + l −1 = R −1.

TL;DR: In this paper, a quantum efficiency of ≈ 0.01 for the generation of the photoisomer of DODCI has been obtained, and the establishment of equilibrium concentrations for the two forms of the dye in mode-locked rhodamine dye lasers has been confirmed.

TL;DR: In this paper, the authors proposed a rigorous electromagnetic formalism to study the coupling resonances which occur when a plane wave illuminates a grating coupler waveguide system under a convenient angle of incidence.

TL;DR: In this article, exact propagation constants and Poynting vectors for surface excitations at an interface between two media with complex dielectric functions are calculated for surface plasmon mean-free-paths.

TL;DR: In this paper, extreme narrowing of bands in the fluorescence excitation spectra of some organic molecules is found, and the effect is observed in a wide variety of matrices and permits one to determine exactly the vibronic structure of the excited electronic state of the dissolved molecule.

TL;DR: In this article, the dispersion diagram of a corrugated dielectric waveguide is derived and the behavior of the waveguide near the important Bragg regime, where the corrugation period is equal to half a wavelength, is considered in detail.