Finite Element Analysis of Thermal Effects in Diode End-Pumped Solid-State Lasers | Zendy

Moustafa Sayem ElDaher | Zendy

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Finite Element Analysis of Thermal Effects in Diode End-Pumped Solid-State Lasers

Author(s) -

Moustafa Sayem ElDaher

Publication year - 2017

Publication title -

advances in optical technologies

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.124

H-Index - 25

eISSN - 1687-6407

pISSN - 1687-6393

DOI - 10.1155/2017/9256053

Subject(s) - materials science , laser , focal length , optics , thermal , diode , lens (geology) , laser beam quality , solid state laser , finite element method , optoelectronics , crystal (programming language) , power (physics) , beam (structure) , work (physics) , laser beams , mechanical engineering , physics , quantum mechanics , meteorology , engineering , programming language , computer science , thermodynamics

Thermal effects are the main obstacle to getting high power and good beam quality in diode end-pumped solid-state lasers. In this work, a theoretical investigation of thermal effects in single and dual end-pumped solid-state lasers is carried out using finite element analysis (FEA) for a selected number of widely used laser producing materials, namely, Nd:YAG, Yb:YAG, and Nd:KGW. Crystals with different dimensions are also investigated both in single and in dual end-pumped configuration. Finally, the effect of using composite crystals on thermal lensing is investigated. An experiment to measure the thermal focal length for two different crystals was carried out and a comparison with FEA computed focal length of the thermal lens is made. In all cases studied in this work, results show clear effects of thermal lensing with some differences depending on crystal type, pump power, and size

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