Passive conductively cooled laser crystal medium

H - Electricity – 01 – S

Patent

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Details

H01S 3/04 (2006.01) H01S 3/042 (2006.01) H01S 3/091 (2006.01) H01S 3/06 (2006.01) H01S 3/0941 (2006.01)

Patent

CA 2246640

There is provided an optically pumped laser apparatus 10 which includes a heat conductive assembly 14 which is affixed to a solidstate yag laser crystal medium for generating a laser beam 49 within the laser crystal medium 12. The heat conductive assembly 14 comprises a heat diffusing element 32 which serves to diffuse the heat that is generated through the cooling surfaces 24 and 26. It includes a heat discharging structure 37 for removing the heat from the system. The efficiency of the laser system is improved by the geometry of pumping the crystal laser medium along the paths shown by the arrow 40 and to directing heat removed by the heat conductive assembly along the arrows 42, which paths are normal to one another and which provide an effective geometry that minimizes temperature variations within the laser crystal 12 to provide a low value for the OPD of the system. The heat conductive assembly 14 may include a liquid type heat exchanger 43, or heat pipes 33 to facilitate removal of the heat from the diffuser 32.

Présentation d'un dispositif laser (10) à pompage optique comprenant un mécanisme transmettant la chaleur (14) qui est rattaché au cristal d'un laser YAG à l'état solide pour produire un faisceau laser (49) dans le cristal du laser (12). Le mécanisme transmettant la chaleur (14) comprend un élément de diffusion thermique (32) qui sert à disperser la chaleur produite à travers les surfaces de refroidissement (24) et (26). Il comprend une structure d'évacuation de la chaleur (37) pour éliminer la chaleur du système. L'efficacité du système laser est améliorée par la géométrie du pompage du laser à cristal sur les trajets du rayon laser illustré au moyen de la flèche (40) et de l'orientation de la chaleur éliminée par le mécanisme transmettant la chaleur le long des flèches (42), ces trajets sont normaux l'un par rapport à l'autre et présentent une géométrie efficace qui minimise les variations de température dans le cristal du laser (12) de manière à obtenir une faible valeur pour la différence de chemin optique (OPD) du système. Le mécanisme transmettant la chaleur (14) peut comprendre un échangeur du type à liquide (43), ou des échangeurs à tube (33) pour faciliter l'élimination de la chaleur du diffuseur (32).

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