Showing papers in "Optics Communications in 1977"

TL;DR: In this article, a simple method (speckle masking) for the reconstruction of real images from astronomical speckle photographs is described, which is applicable to a restricted class of objects that includes double stars.

TL;DR: In this paper, a volume phase hologram recording in pure LiNbO 3 crystals with applied electric field E ≈ 5 kV/cm is accompanied by considerable intensity redistribution of the writing beams by transient energy transfer.

TL;DR: In this article, the optical constants of organic monolayers on gold were calculated from shifts in the surface plasmon resonance (ATR) from two to several organized layers of cadmium arachidate (each known independently to be 2.68 nm thick).

TL;DR: In this article, the authors measured the absolute dissociation probability of SF6 gas irradiated by CO2 laser pulses varying in duration from 0.5 nsec to 100 nsec.

TL;DR: In this article, the problem of noncollinear second harmonic generation (NSHG) of short, spatially limited light pulses in uni-axial nonlinear crystals has been solved based on an analysis of the obtained solution.

TL;DR: In this paper, the fluorescence lifetime of an excited molecule described as a classical oscillating dipole in front of a partially reflecting plane interface is studied theoretically, the lifetime being inversely proportional to the radiated power.

TL;DR: In this paper, second-harmonic light generation (SHLG) is analyzed from the viewpoint of photon statistics of the fundamental and generated beams versus the path traversed by the two waves in the medium.

TL;DR: In this article, the authors show that there are various stable equilibrium positions for transparent glass spheres levitated by two horizontal TEM 00 laser beams and present both a theoretical study of the equilibrium positions and the experimental results confirming their theory.

TL;DR: In this paper, a comparison of ro-vibrational transitions in the separated optical isomers of camphor is presented, and the transition frequencies of d- and 1-camphor have been found to agree to within an accuracy of 1x10-8.

TL;DR: In this article, the N × N coherency matrix is expanded in terms of the principal idempotent decomposition whereby the eigenvalues of the cohemrency matrix are the scalar expansion coefficients rather than the generalized Stokes parameters.

TL;DR: In this article, a 1.064 μm pulsed pump of 250 W in a 175m, 6-μm diameter single-mode silica fiber was used as a pulsed tunable stimulated Raman source.

TL;DR: In this paper, a sampling technique utilizing an Auston switch was used to determine the time response of a fast oscilloscope and resolve the impulse response of two fast photodiodes.

TL;DR: In this paper, the use of nonlinear optical mixing for compensating for atmospheric propagation distortion is considered, and nonlinear mixing is used to compensate for atmospheric distortion in a nonlinear manner.

TL;DR: In this paper, a number of new optical effects in liquids are considered, including the electrical analog of the Faraday effect etc. The mechanisms of related processes are discussed and estimations of the corresponding constants are given.

TL;DR: In this article, the statistical properties of speckle in ordinary imaging systems using a gaussian approximation were examined and expressions for the probability density and contrast of the pattern at an arbitrary axial point were derived and discussed.

TL;DR: In this paper, the authors considered a Doppler broadened two-level system, where alternative absorption and emission from two oppositely travelling waves is interpreted as a multi-quantum absorption (or emission) process with quanta h kv.

TL;DR: In this paper, it is demonstrated that cw stimulated Raman spectroscopy using low power pump and probe sources is a viable coherent Raman technique for obtaining Raman spectrum.

TL;DR: In this paper, a positive branch 6.3 mm diameter rod Nd:YAG unstable resonator oscillator with a 12 nsec, 200 mJ Q -switched output at 10 Hz repetition rate was designed and operated.

TL;DR: In this article, the nuclear quadrupole hyperfine splittings of Pr3+ in LaF3 have been measured for the ground electronic state using a RF optical resonance technique, and a hamiltonian H = P[(I2z− 13I(I+1) + (η/6)(I2+−I2-)] was fitted to the data with zP=4.185 ± 0.003 MHz and η = 0.105 ± 0010.

TL;DR: In this paper, an expression relating the Hecht vibrational splitting parameters G33 and T33 to the normal coordinate force constants has been derived for molecules of octahedral symmetry.

TL;DR: A rich fluorescence spectrum extending between 4000 and 8200 A has been observed whenever sodium vapor is excited by dye laser light tuned to the 3 2 S → 3 2 P transition.

TL;DR: In this article, a geometry independent dissociation cross section is introduced and measured values are presented, below which no dissociation was observed, and the threshold energy densities, below the threshold, were also determined.

TL;DR: The first observation of reflected optical second harmonic generation of light due to excitation of fundamental and harmonic surface plasmon modes at the interface between a metallic film and a piezoelectric crystal was reported in this article.

TL;DR: In this paper, the dependence of molecular excitation upon laser frequency, between nonperturbative quantum-mechanical calculations and experimental measurements of the collisionless multiple-photon excitation of a few vibrational quanta in SF 6 by a CO 2 laser, results when anharmonic splitting of the vibrational energy levels is taken into account.

TL;DR: In this article, the existence of the inhomogeneous distribution of local vibrational frequencies in addition to pure electronic frequencies in the spectra of impurity molecules is demonstrated by the hole-burning technique.

TL;DR: In this paper, a technique for high resolution measurements using a c.w. tunable dye laser was described, with atomic beam fluxes as low as 10 atoms/s, corresponding to a spatial density of about 0.2 atoms/cm 3.

TL;DR: In this paper, the absolute frequencies of 93 lines of the 00°2]-10°1, 02°1]I, II and 00°3-[10°2, 2°2]I CO2 laser bands have been measured by heterodyning with the well known CO 2 laser frequencies of the 0°1]-I,II band in a tungsten-nickel diode and the measured frequencies were used to calculate the band centre frequencies and the rotational constants.

TL;DR: In this paper, light-controlled silicon switches have been used to drive a travelling wave Kerr cell and a fast Pockels cell with picosecond timing, and the results obtained with light controlled silicon switches are reported.

TL;DR: Active mode-locking and Q-switching of the Nd:YAG laser has produced short, transform-limited pulses from 60 ps to 1 ns, with more than 0.4 mJ energy per short pulse over most of this range.

TL;DR: In this article, a dye laser omega(p) focussed into sodium vapour produced stimulated hyper-Raman emission (2omega(p)- omega(3s-4p) ) at 2.3 µm.