Multi-element monolithic solid state laser

Details Multi-element monolithic solid state laser Multi-element monolithic solid state laser

H - Electricity

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H01S 3/08 (2006.01) H01S 3/02 (2006.01) H01S 3/06 (2006.01) H01S 3/042 (2006.01) H01S 3/0941 (2006.01) H01S 3/098 (2006.01) H01S 3/16 (2006.01) H01S 3/17 (2006.01)

Patent

CA 2237697

A monolithic solid state laser structure is used to construct erbium lasers that are insensitive to external pressure changes and vibrations, and have improved cooling of the gain medium (20) and reduced thermal lensing effect. In the monolithic laser structure, the gain medium (20) is separated from an optically transmissive plate (24) on one side and a wave plate (21) on the other side by spacers to form narrow air gaps (31 and 33) which provide effective cooling of the gain medium (20) and reduced the thermal lensing effect. Such an arrangement is further combined with a pressure-insensitive brewster polarizer such as a solid brewster polarizer (42 and 46), or a pressure-sealed brewster plate (249), to form a pressure-insensitive laser cavity. The wave plate (2') cooperates with the brewster polarizer (42 and 46) to select the wavelength of the solid state laser.

On utilise une structure laser monolithe à solide pour construire des lasers à l'erbium insensibles à des modifications de pression extérieure et aux vibrations et bénéficiant d'un refroidissement amélioré du milieu de gain (20) ainsi que d'un effet thermique lenticulaire réduit. Dans cette structure monolithe, le milieu de gain (20) est séparé d'une lame à transmissivité optique (24) d'un coté, et d'une lame à ondes (21) de l'autre coté, par des espaceurs afin de constituer des entrefers étroits (31 et 33), ce qui permet de refroidir efficacement le milieu de gain (20) et de réduire l'effet thermique lenticulaire. Cet agencement se combine, de surcroît, avec un polariseur de Brewster à solide (42 et 46) insensible à la pression ou à une lame de Brewster scellée sous pression (249) afin de former une cavité de laser insensible à la pression. La lame à ondes (2') coopère avec le polariseur de Brewster (42 et 46) afin de sélectionner la longueur d'onde du laser à solide.

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