2026-04-14T09:08:38Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3879902026-02-01T08:23:41Zcom_2072_1033col_2072_452950

Transverse modes and beam spatial quality in microchip lasers Plukys, Matas Gaizauskas, Eugenijus Gailevicius, Darius Staliunas, Kestutis Universitat Politècnica de Catalunya. Departament de Física Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers Àrees temàtiques de la UPC::Física Lasers Optical pumping Lasers Lasers Bombeig òptic We analyze the transverse modes in flat-flat mirror microchip-laser resonators, which occur due to the gain guiding and the thermal lensing. We rigorously calculate the transverse-mode functions, their eigenfrequencies, and their generation-threshold conditions. We apply a plausible assumption that the mode amplitudes in multi-transverse-mode emission are proportional to the individual gain factors of each mode, and we estimate the beam quality factor for the multi-transverse-mode emission. This simple and intuitive approach leads to the beam quality estimations corresponding well to the experimental measurements performed here. Postprint (published version) 2023-04-01 Article Plukys, M. [et al.]. Transverse modes and beam spatial quality in microchip lasers. "Physical review, A", 1 Abril 2023, vol. 107, núm. 43505. 2469-9934 https://hdl.handle.net/2117/387990 10.1103/PhysRevA.107.043505 eng https://journals.aps.org/pra/abstract/10.1103/PhysRevA.107.043505 http://creativecommons.org/licenses/by-nc-nd/4.0/ Restricted access - publisher's policy Attribution-NonCommercial-NoDerivatives 4.0 International application/pdf American Physical Society