Discharge arrangement for pulsed gas lasers

H - Electricity – 01 – S

Patent

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Details

H01S 3/038 (2006.01) H01S 3/0971 (2006.01)

Patent

CA 2195770

The description relates to a discharge arrangement (1) for pulsed gas lasers in which there are laser electrodes (8, 9) in the space (15) between which discharges with intense u/v emission are produced by an arrangement on at least one side, by means of which the space (15) between the laser electrodes (8, 9) is pre-ionised. Essentially in the invention, the arrangement (2, 3, 4) consists of at least one rod electrode (2) which is surrounded by an insulating, preferably ceramic, material (4) and has a conductive contact (5) with the surface (6) of insulating ceramic material (4) and on this surface (6) there is at least one counter-electrode (7) spaced from the rod electrode (2) which is conductively connected to one of the laser electrodes (8), whereby sliding discharge paths (13) are formed between the rod electrode (2) and the counter-electrode (7). This provides a discharge arrangement (1) making the laser beam generation markedly more effective and lengthening the useful life of the components and gas filling of the laser.

L'invention concerne un système de décharge (1) pour lasers à gaz impulsionnels comprenant des électrodes laser (8, 9), dans l'espace intermédiaire (15) desquels il est prévu un système (2, 3, 4) situé au moins d'un côté et servant à produire des décharges à émission intense d'U.V., qui entraîne une pré-ionisation des espaces intermédiaires (15) situés entre les électrodes laser (8, 9). L'invention se caractérise essentiellement en ce que le système (2, 3, 4) se compose d'au moins une électrode (2) se présentant sous forme de barre, entourée d'un matériau isolant, de préférence céramique, et comportant un contact (5) conducteur en direction de la surface (6) du matériau céramique (4) isolant. Au niveau de cette surface (6), il est prévu au moins une contre-électrode (7) placée à distance de l'électrode (2) en forme de barre, qui est reliée de manière conductrice à une des électrodes laser (8), et des sections de décharge glissante (13) se forment entre l'électrode (2) en forme de barre et la contre-électrode (7). Le système de décharge (1) ainsi obtenu permet de produire des faisceaux laser nettement plus efficaces et de prolonger la durée de vie des éléments constitutifs et du remplissage de gaz du laser.

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