High power diode pumped solid state (DPSS) laser systems active media robust modeling and analysis

Tamer M. Kashef; Ayman M. Mokhtar; Samy A. Ghoniemy

doi:10.1117/12.2292307

15 February 2018 High power diode pumped solid state (DPSS) laser systems active media robust modeling and analysis

Tamer M. Kashef, Ayman M. Mokhtar, Samy A. Ghoniemy

Proceedings Volume 10511, Solid State Lasers XXVII: Technology and Devices; 105112E (2018) https://doi.org/10.1117/12.2292307
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

Diode side-pumped solid-state lasers have the potential to yield high quality laser beams with high efficiency and reliability. This paper summarizes the results of simulation of the most predominant active media that are used in high power diode pumped solid-state (DPSS) laser systems. Nd:YAG, Nd:glass, and Nd:YLF rods laser systems were simulated using the special finite element analysis software program LASCAD. A performance trade off analysis for Nd:YAG, Nd:glass, and Nd:YLF rods was performed in order to predict the system optimized parameters and to investigate thermally induced thermal fracture that may occur due to heat load and mechanical stress. The simulation results showed that at the optimized values Nd:YAG rod achieved the highest output power of 175W with 43% efficiency and heat load of 1.873W/mm³. A negligible changes in laser output power, heat load, stress, and temperature distributions were observed when the Nd:YAG rod length was increased from 72 to 80mm. Simulation of Nd:glass at different rod diameters at the same pumping conditions showed better results for mechanical stress and thermal load than that of Nd:YAG and Nd:YLF which makes it very suitable for high power laser applications especially for large rod diameters. For large rod diameters Nd:YLF is mechanically weaker and softer crystal compared to Nd:YAG and Nd:glass due to its poor thermomechanical properties which limits its usage to only low to medium power systems.

Citation Download Citation

Tamer M. Kashef, Ayman M. Mokhtar, and Samy A. Ghoniemy "High power diode pumped solid state (DPSS) laser systems active media robust modeling and analysis", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105112E (15 February 2018); https://doi.org/10.1117/12.2292307

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KEYWORDS

Nd:YAG lasers

Optical simulations

Neodymium lasers

Laser crystals

Laser systems engineering

Semiconductor lasers

Diodes

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