Showing papers by "Daniel J. Gauthier published in 1986"

Simple, compact, high-performance permanent-magnet Faraday isolator.

Abstract: The design of a Faraday isolator that uses a short glass rotator rod and produces highly uniform rotation across its clear aperture is presented. The rotator rod is 19.5 mm long, and at a wavelength of 633 nm the rotation angle is 45 deg and the isolation ratio is >45 dB.

Procede et installation de dissociation d'eau par thermolyse

Abstract: L'INVENTION CONCERNE UN PROCEDE ET UNE INSTALLATION POUR LA DISSOCIATION CONTINUE D'EAU EN HYDROGENE ET OXYGENE, PAR UNE REACTION DE THERMOLYSE AU CONTACT DE LA SURFACE 9A D'UN CORPS REFRACTAIRE 9, PORTEE A HAUTE TEMPERATURE LA SURFACE 9A DISPOSEE DANS UN REACTEUR 1 EST IMMERGEE DANS UNE MASSE D'EAU LIQUIDE 19 ET EST CHAUFFEE PAR UN APPORT ENERGETIQUE - NOTAMMENT PAR CONCENTRATION D'UN RAYONNEMENT SOLAIRE A TRAVERS UNE PAROI TRANSPARENTE 4 - DE FACON A LA MAINTENIR A LA TEMPERATURE DE THERMOLYSE AU COEUR DE LA MASSE D'EAU UN REGIME D'EBULLITION PERMANENTE EST AINSI ENTRETENU AU VOISINAGE IMMEDIAT DE LADITE SURFACE ET PRODUIT UNE PELLICULE GAZEUSE A PROXIMITE DE CELLE-CI LA MASSE D'EAU EST PREVUE EN QUANTITE APPROPRIEE POUR CONSERVER DE FACON PERMANENTE DE L'EAU SOUS FORME LIQUIDE AUTOUR DE CETTE PELLICULE GAZEUSE DANS CETTE PELLICULE, LES MOLECULES D'EAU VAPORISEES SONT DECOMPOSEES ET UNE TREMPE DES PRODUITS ISSUS DE LA DECOMPOSITION EST ASSURE IN SITU PAR L'EAU LIQUIDE AVOISINANTE

Instabilities in a Self-Pumped Barium Titanate Phase Conjugate Mirror

Abstract: We report the observation of intrinsic instabilities in the reflectivity of a barium titanate, self-pumped phase conjugate mirror (SPPCM). In such a device, a laser beam is focused into a crystal of barium titanate, and a beam is generated within the crystal that has been shown by FEINBERG [1] to be the phase conjugate of the incident laser beam. A model has been proposed [2] to explain this effect in terms of self beam fanning: the incident laser beam breaks up into new spatial components by self focusing. These components undergo total internal reflection at the corners of the crystal and are redirected in such a way that they intercept the incident laser beam, thereby forming the counterpropagating pump waves needed to create the phase conjugate beam by the usual four-wave mixing process. Since the pump waves grow from noise by a highly nonlinear process, and interact strongly with the incident and conjugate beams, it might be expected that the output beam would show unstable or even chaotic behavior. An alternative model for self-pumped phase conjugation has been presented by LAM [3]. According to this model, the phase conjugate return is formed by a two-beam stimulated scattering process. This process would not be expected to produce a chaotic output.