Analytical model for thermal lensing and spherical aberration in diode side-pumped Nd:YAG laser rod having Gaussian pump profile. (20th October 2015)

• Record Type: Journal Article
• Authors: Moghtader Dindarlu, M H; Kavosh Tehrani, M; Saghafifar, H; Maleki, A
• Is Part Of: Chinese physics B. Volume 24:Number 12(2015:Dec.)
• Publication Date: 2015-10-20
• Subjects: 42.55.Xi -- 42.25.Lc -- 42.25.Bs; side-pumped laser rod -- Gaussian pump profile -- thermal effects -- thermal lens -- spherical aberration; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1674-1056/24/12/124205
• Languages: English
• ISSNs: 1674-1056

Abstract

Abstract: In this paper, according to the temperature and strain distribution obtained by considering the Gaussian pump profile and dependence of physical properties on temperature, we derive an analytical model for refractive index variations of the diode side-pumped Nd:YAG laser rod. Then we evaluate this model by numerical solution and our maximum relative errors are 5% and 10% for variations caused by thermo–optical and thermo–mechanical effects; respectively. Finally, we present an analytical model for calculating the focal length of the thermal lens and spherical aberration. This model is evaluated by experimental results.