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Q: Fachverband Quantenoptik und Photonik
Q 44: Laser Development and Applications
Q 44.4: Vortrag
Donnerstag, 12. März 2020, 11:45–12:00, f435
High-Order and Multi-Line Transverse Mode Locking of an End-Pumped Solid-State Laser — •Florian Schepers1 and Carsten Fallnich1,2 — 1Institute of Applied Physics, University of Münster, Germany — 2MESA+ Institute of Nanotechnology, University of Twente, The Netherlands
Transverse mode locking (TML) was demonstrated for the first time by Auston [1] in 1968, generating a fast scanning beam in the transverse direction of the cavity by locking the phases of multiple transverse modes.
In this talk we demonstrate a three times broader beam scanning range in comparison to previous results [2] by implementing TML in an end-pumped solid-state laser using an acousto-optic modulator. This improvement was accomplished by both, a large effective open aperture of the gain medium and a line-shaped pump light distribution, providing gain for a high number of transverse modes and thus enabling an increase of the central mode number n of the TML-process from n = 4 to n = 36. Furthermore, we realized a beam that was scanning synchronously on multiple parallel lines by being operated on a single higher-order mode in the orthogonal direction of the TML-process.
[1] D. Auston, IEEE J. Quantum Electron. 4, 471–473 (1968)
[2] C. Haug et al., IEEE J. Quantum Electron. 10, 406-408 (1974)