Closed-loop controlled compensation of thermal lensing in high-power thin-disk lasers using spherically deformable mirrors. (13th January 2021)

• Record Type: Journal Article
• Authors: Beirow, Frieder; Schmidt, Kevin; Sawodny, Oliver; Graf, Thomas; Ahmed, Marwan Abdou
• Is Part Of: Laser physics letters. Volume 18:Number 2(2021)
• Publication Date: 2021-01-13
• Subjects: Thin-disk laser -- deformable mirror; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/abd3fa
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We present the closed-loop controlled compensation of the thermally induced lens in a high-power thin-disk oscillator to obtain fundamental-mode operation over a wide range of pump powers. The radius of the oscillating beam was measured in real time at the position of the thin-disk crystal. This signal was used by the control system to adapt the curvature of a spherically deformable mirror to maintain a constant radius of the oscillating laser beam.