Showing papers in "Optics Communications in 1980"

TL;DR: In this paper, a linear polarizer or Brewster plate is placed inside the reference cavity, so that the reflected light acquires a frequency-dependent elliptical polarization, which can provide the error signal for electronic frequency stabilization without any need for modulation techniques.

TL;DR: In this article, a rigorous definition of the local spectrum is proposed based on the Wigner distribution function, and optical methods for producing this local spectrum are developed for sound pattern analysis.

TL;DR: In this article, it was shown that an exact realization of a Collett-Wolf source is given by a laser oscillating on a suitable superposition of (infinitely many) transverse modes.

TL;DR: In this article, the brightest point in each image is shifted to the centre of image space and all images are superimposed, which is suitable for imaging faint astronomical objects with large optical telescopes.

TL;DR: In this article, four alternative criteria for the occurence of Bragg regime diffraction by phase gratings are presented and evaluated, and four alternative approaches for phase gratifications are compared.

TL;DR: In this article, the authors reported an efficient conversion from 1.054 μm to 0.35 μm by third harmonic generation in two Type II KDP crystals, achieving energy conversion efficiencies of up to 80% under conditions applicable to large glass laser systems.

TL;DR: In this paper, the solvent effect on fluorescence yield is interpreted in terms of the intervention of planar and non-planar excited species which appears to be general for polar dyes.

TL;DR: In this paper, the coherent anti-Stokes Raman spectroscopy (CARS) spectrum of N2 has been recorded experimentally over the pressure range from one to 100 atmospheres.

TL;DR: In this paper, a novel scheme for optical bistability in a coherently driven three-level atomic system is proposed, which utilizes the non-absorption resonance which occurs due to a population trapping in the coherent superposition of the ground state sublevels.

TL;DR: In this paper, three alternative criteria for the occurence of Raman-Nath regime diffraction by planar phase gratings are presented and evaluated, and three alternative approaches for the analysis of planar phases are presented.

TL;DR: In this article, the authors carried out a series of observations of the far field intensity distribution produced by a class of partially coherent planar sources and showed experimentally how the coherence length in the source plane can be measured directly from the far zone intensity distribution.

TL;DR: In this article, a tripling configuration was used in which the fundamental beam was incident upon the first of two KDP Type II crystals linearly polarized at an angle of tan−1 1/√2 to the ordinary direction.

TL;DR: In this article, a tunable narrowband VUV radiation has been generated at the Lyman-α wavelength λ = 1216 & A ring ; by frequency tripling in krypton the frequency-doubled output of a powerful dye laser system which is excited with the second harmonic of a Nd-YAG laser.

TL;DR: In this article, the dynamic holographic recording and phase conjugation of 3D diffuse objects in photorefractive B.S.O. crystals are analyzed and applied to mode pattern visualisation of a vibrating loudspeaker membrane.

TL;DR: Temporal broadening of an ultrafast laser pulse upon passage through a low and high resolution spectrograph has been measured using a streak camera/video readout system as discussed by the authors.

TL;DR: In this article, the dependence of photocurrent on laser intensity was studied up to the damage threshold of tungsten using 30 ps pulses from a Nd:YAG laser.

TL;DR: In this paper, the design of a pulsed dye laser cavity incorporating a double-prism beam expander is described and operating characteristics compared with those of single prism systems.

TL;DR: In this paper, microscopic models are proposed for the bandgap-resonant low-intensity nonlinear refraction observed in InSb by Miller et al., predicting the self-defocusing deduced from beam patterns.

TL;DR: In this paper, the sensitivity of pulsed photo-acoustic and photo-refractive (e.g., thermal lensing) techniques for the measurement of small absorptions in liquids have been evaluated both theoretically and experimentally.

TL;DR: In this paper, an explicit expression for the cross-spectral density function of the light in any cross-section perpendicular to the axis of a beam generated by a planar, steady-state, quasi-homogeneous source, whose intensity distribution and degree of spatial coherence are both gaussian, is presented.

TL;DR: In this paper, three saturable absorbers with an absorption recovery time shorter than the commercial dye No. 9860 were reported and the smallest time constant was found to be 2.7 ps.

TL;DR: In this paper, the storage of speckle pattern in real-time by means of Bi 12 SiO 20 -crystals was reported, and the double exposure technique was applied to analyze deformations, displacements, and tilts.

TL;DR: In this paper, the stability of the stationary solutions of dispersive optical bistability in a ring cavity for a homogeneously broadened atomic system was analyzed in the limit α L ⪡ 1, with C = αL 2 T fixed.

TL;DR: In this article, the orientation of the transition dipole moment for S1-S4 excitation in rhodamine 6G is measured by excited state absorption with a picosecond pump and probe technique.

TL;DR: In this paper, the authors investigated the interaction of gaussian pulses (spatial and temporal) with the two-level absorbber and calculated energy transmission, pulse shortening and pulse asymmetry as functions of pulse width and small signal transmission of the absorber.

TL;DR: In this paper, the photorefractive effects associated with quadratic electro-optic mechanisms were studied in the cubic phase of potassium tantalate-niobate, and the results of holographic measurements were compared with theory to explain the influence of writing and read-out electric fields and to determine the dominant charge carriers.

TL;DR: In this paper, the authors measured the change in direction of the emission lobes as a function of the injection field frequency, and recorded the spectrum of the 7P 3 2 − 7S 1 2 superradiant transition in cesium.

TL;DR: In this article, the importance of the laser pulse's wavefront divergence on the intensity distribution of the focalized energy along the axicon's axis is emphasized by solving the Kirchkoff-Fresnel integral.

TL;DR: In this article, the Rydberg states have been populated using cw dye lasers to reduce the influence of the background radiation, and a NEP of 10 -19 W Hz -1 2 can be achieved.

TL;DR: In this paper, the nonlinear susceptibilities of Kr up to fifth order via nonresonant third-harmonic generation (THG) of a frequency-doubled dye laser at 3648 A were measured.