Abstract
AbstractA comprehensive spatio‐temporal characterization is presented describing the pump‐induced wavefront aberrations in Yb3 + ‐doped YAG, CaF2, and fluorophosphate glass. Time‐resolved interferometric measurements were performed to reveal the profiles of the total optical path differences (OPDs), which are described by the spatio‐temporal superposition of thermal as well as electronic contributions, across the free aperture of the considered diode‐pumped active materials. These contributions were individually determined by a COMSOL‐based thermal profile model along with a detailed characterization of the electronic changes by measuring the single‐pass gain and the spatial fluorescence profile. Due to the low quantum defect, the amplitude of the electronic component becomes comparable for all three materials and, in the case of Yb:CaF2, almost completely compensates the thermal component resulting from a pump pulse during the time frame of laser pulse amplification. Finally, all relevant material constants – such as the photoelastic constant and the polarizability difference – could be determined during this investigation, allowing the accurate modeling of the total pump‐induced wavefront aberrations and subsequent optimization for laser systems worldwide employing these Yb3 + ‐doped materials.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
