摘要:
Procédé de réalisation d'une fibre optique selon lequel on prévoit les étapes suivantes: ― une étape de réalisation d'une préforme (1) possédant un axe de symétrie et leurs extrémités (11, 12) et comportant un coeur optique ainsi qu'au moins un évidement cylindrique (13, 14) dont l'axe est parallèle à l'axe de symétrie de la préforme; ― une étape d'étirage à une température permettant le ramollissement de la partie étirée de la préforme, de façon à obtenir une fibre optique creuse, caractérisé en ce qu'il comporte, après l'étape précédente de réalisation de la préforme: ― une étape de fixation de manière étanche, à une extrémité (11) de la.préforme (1), d'une enceinte creuse (2) dont la cavité (20) communique avec l'évidement de la préforme, ladite cavité (20) communique également avec un dispositif de régulation pneumatique; ― l'étape d'étirage comportant une régulation pneumatique du gaz contenu dans la cavité (20) et dans l'évidement à l'aide du dispositif de régulation pneumatique (3).
摘要:
An electrooptic photonic crystal fiber having a central part forming a Bragg structure, the central part comprising a core (1) made homogeneously from low refractive glass and pre-designed set of altering claddings made of high refractive (2) and low refractive glasses (3); and a peripheral part forming an envelope of the Bragg structure, the peripheral part (5, 7) being formed from multicomponent glasses with low viscosity in the fiber drawing temperature range. Metallic electrodes (8) are embedded in the peripheral part adjacent to the central part on diametrically opposite sides. The method for manufacturing such a fiber includes drawing of separate rods from glass bars constituting fiber elements, drawing of electrodes in the form of metal filled glass capillaries, bundling a package with hexagonal section and internal Bragg structure from the rods, drawing a rod from the package, assembling a secondary package from the rods with Bragg structure, electrode capillaries and glass rods forming the envelope of Bragg structure, re-drawing the secondary package into a preform and then into photonic crystal electrooptic fiber.
摘要:
The invention concerns a device and a method for continuously producing a glass-sheathed metal wire (10) of great length, which consists in mainly using a feeding tube (15) containing all the required metal, itself placed in a glass tube (20), so as to provide continuous supply of a drop of molten metal (14) at the base of the glass tube (20). By heating with a first inductor (23) around the glass tube (20) and a second inductor (24) beneath the glass tube (20) the molten metal drop (14) temperature is maintained continuously constant and the glass-sheathed metal wire (10) is continuously drawn.
摘要:
An electrooptic photonic crystal fiber having a central part forming a Bragg structure, the central part comprising a core (1) made homogeneously from low refractive glass and pre-designed set of altering claddings made of high refractive (2) and low refractive glasses (3); and a peripheral part forming an envelope of the Bragg structure, the peripheral part (5, 7) being formed from multicomponent glasses with low viscosity in the fiber drawing temperature range. Metallic electrodes (8) are embedded in the peripheral part adjacent to the central part on diametrically opposite sides. The method for manufacturing such a fiber includes drawing of separate rods from glass bars constituting fiber elements, drawing of electrodes in the form of metal filled glass capillaries, bundling a package with hexagonal section and internal Bragg structure from the rods, drawing a rod from the package, assembling a secondary package from the rods with Bragg structure, electrode capillaries and glass rods forming the envelope of Bragg structure, re-drawing the secondary package into a preform and then into photonic crystal electrooptic fiber.
摘要:
The invention discloses a static support bed (SSB) for purification, separation, detection, modification, and/or immobilization of target chemical entities or target biological entities present in a fluid. The static support bed of the present invention comprises one or more microwire supports suitable for the attachment of target chemical entities or target biological entities.