COMPENSATION DEVICE FOR THERMAL LENS IN A HIGH-FREQUENCY FEMTOSECOND REGENERATING CAVITY

摘要

The invention concerns a laser cavity which is a laser cavity of the type of high-frequency pumping femtosecond regenerative cavity, comprising a gain medium, such as a Ti:Sa crystal, and at least two cavity base mirrors. The invention is characterized in that its gain medium (12) is designed to be contacting or proximate one of its cavity base mirrors (11), which is a convex mirror of which the radius of curvature is a function of the desired stability range compatible with the thermal focus of the crystal.