Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission

Saha S, Mackenzie J, Pflaum C (2024)

Publication Language: English

Publication Type: Conference contribution, Original article

Publication year: 2024

Publisher: SPIE Digital Library

Series: SPIE Optical Systems Design

Book Volume: 13023

Conference Proceedings Title: Proceedings Computational Optics 2024

Event location: Strasbourg, France FR

DOI: 10.1117/12.3016718

Abstract

Simulation of diode-pumped solid-state lasers (DPSSL) and amplifiers often do not account for the temperature and spectral dependencies of the absorption and emission cross sections of the gain medium. Typically, to track the pump absorption within the crystal, an average absorption coefficient is applied via a raytracing technique. The outcome, therefore, is an approximation of the pump absorption profile that is independent of the temperature profile within the gain medium. Here an iterative algorithm involving raytracing and Finite Element Analysis (FEA) is demonstrated in the simulation of neodymium(Nd) and ytterbium(Yb) doped yttrium aluminium garnet(YAG) single crystal fiber (SCF) gain media. The algorithm calculates the local temperature, associated absorption coefficient and hence temperature-dependent pump absorption. This allows for a more accurate determination of the distributions of the calculated population inversion and temperature in the crystal. The temperature dependence of the emission spectra can then be taken into account as well, which defines the achievable gain of the amplifying media. The resulting calculations’ influence on the simulated output beam quality and gain for these active media is presented.

Authors with CRIS profile

Souryadeep Saha Professur für Informatik (Numerische Simulation mit Höchstleistungsrechnern) Christoph Pflaum Professur für Informatik (Numerische Simulation mit Höchstleistungsrechnern)

How to cite

APA:

Saha, S., Mackenzie, J., & Pflaum, C. (2024). Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission. In Proceedings Computational Optics 2024. Strasbourg, France, FR: SPIE Digital Library.

MLA:

Saha, Souryadeep, Jacob Mackenzie, and Christoph Pflaum. "Simulation of solid-state lasers with temperature and wavelength dependent absorption and emission." Proceedings of the SPIE Optical Systems Design, 2024, Strasbourg, France, Strasbourg, France SPIE Digital Library, 2024.

BibTeX: Download