The extreme intensities that can be reached within the fiber core give rise to a plethora of effects that can potentially limit further scaling of the output power. Thus, extensive multi-physics simulation models have to be devised to evaluate and optimize new high-power fiber-laser systems. Additionally, these models provide theoretical understanding of the impact of, among others, nonlinear and thermal effects. This understanding is required to propose solutions aimed at overcoming present limitations.

Simulated transversally resolved inversion distribution of a saturated fiber amplifier.
(rights: IAP)

At the fiber & waveguide lasers group we have developed over the years a wide variety of numerical tools that allow us to simulate, for example, complete multi-stage fiber laser systems, laser dynamics, the propagation of electromagnetic radiation within active fibers, the impact of temperature in fiber lasers, etc. These versatile tools help us in our daily task of advancing the technology of fiber lasers.

Multi-element simulation tool developed at the IAP for simulating fiber laser and amplifier systems.
(rights: IAP)

Selected publications:

[1] C. Jauregui, J. Limpert, and A. Tünnermann, "Derivation of Raman treshold formulas for CW double-clad fiber amplifiers," Opt. Express 17, 8476-8490 (2009), link to journal

[2] C. Jauregui, T. Eidam, J. Limpert, and A. Tünnermann, "Impact of modal interference on the beam quality of high-power fiber amplifiers," Opt. Express 19, 3258-3271 (2011), link to journal

[3] C. Jauregui, T. Eidam, H. Otto, F. Stutzki, F. Jansen, J. Limpert, and A. Tünnermann, "Temperature-induced index gratings and their impact on mode instabilities in high-power fiber laser systems," Opt. Express 20, 440-451 (2012), link to journal

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