Table of Contents
Advances in Optical Technologies
Volume 2017, Article ID 9256053, 15 pages
https://doi.org/10.1155/2017/9256053
Research Article

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

1Physics Department, Damascus University, Damascus, Syria
2Faculty of Informatics and Communications, Arab International University, Daraa, Syria

Correspondence should be addressed to Moustafa Sayem El-Daher; gro.ten-scs@mrehadle

Received 23 November 2016; Revised 6 February 2017; Accepted 2 March 2017; Published 10 April 2017

Academic Editor: Augusto Beléndez

Copyright © 2017 Moustafa Sayem El-Daher. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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.