We present a Yb:YAG thin-disk laser with an adjustable and stable beam profile. A double-cavity geometry with an acousto-optic modulator (AOM) makes the spatial separation of the gain area, in which the central and external parts are used for
L
G
00
and
L
G
01
mode generation, respectively. By changing the loss of the AOM, the beam profile of the primary cavity is adjustable from annularity to flat-top continuously. At input pump power of 44 W, 8.5 W annular, 11.1 W shallow crater-shaped, and 12.1 W flat-topped modes were obtained. Moreover, the thin-disk laser with a multi-pass pumping scheme not only improves thermal management, but also minimizes depolarization loss, allowing the optimization of mode stability and laser performances. This Letter implies that a high-power laser with an adjustable and stable beam profile can be implemented via this scheme.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.