LASER-SIMULATION TOOLS

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.

simulation2 
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.

simulation3
Multi-element simulation tool developed at the IAP for simulating fiber laser and amplifier systems.
(rights: IAP)


Selected publications:

[1] 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 (2012).
link to journal


[2] C. Jauregui, C. Stihler, A. Tünnermann, and J. Limpert, "Pump-modulation-induced beam stabilization in high-power fiber laser systems above the mode instability threshold," Opt. Express 26, 10691 (2018). link to journal

[3] C. Stihler, C. Jauregui, A. Tünnermann, and J. Limpert, "Modal energy transfer by thermally-induced refractive index gratings in Yb-doped fibers," Light Sci. Appl. submitted, (2018). link to journal

[4] C. Jauregui, H.-J. Otto, F. Stutzki, J. Limpert, and A. Tünnermann, "Simplified modelling the mode instability threshold of high power fiber amplifiers in the presence of photodarkening," Opt. Express 23, 20203 (2015). link to journal

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

[6] D. Nodop, C. Jauregui, D. Schimpf, J. Limpert, and a Tünnermann, "Efficient high-power generation of visible and mid-infrared light by degenerate four-wave-mixing in a large-mode-area photonic-crystal fiber.," Opt. Lett. 34, 3499-501 (2009).
link to journal

[7] C. Gaida, M. Gebhardt, F. Stutzki, C. Jauregui, J. Limpert, and A. Tünnermann, "Self-compression in a solid fiber to 24 MW peak power with few-cycle pulses at 2 um wavelength," Opt. Lett. 40, 5160-5163 (2015). link to journal



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