Share Email Print
cover

Proceedings Paper

Characterization of Yb:YAG active slab media based on a layered structure with different doping
Author(s): A. Lapucci; M. Ciofini; L. Esposito; P. Ferrara; L. A. Gizzi; J. Hostaša; L. Labate; A. Pirri; G. Toci; M. Vannini
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Slabs with non-uniform doping distribution are studied with the aim of reducing thermal deformations in high-energy high-average-power Yb:YAG slab systems. We present a numerical analysis based on Finite Element Mesh (FEM) methods suitable to model non-uniform devices. The thermal variation of the refractive index, the end-faces deformations and the photo-elastic effect have been calculated in order to estimate the total thermal-lens effect. The stress distributions are also obtained. Some results of this numerical approach are compared to experimental thermal lens measurements in a simple geometry for both uniform and structured samples, in order to validate the numerical procedures. Finally we compare numerical simulations for different single- or double-sided pumping and cooling geometries. They show that structured slabs can reduce thermal gradients with respect to uniformly doped means with comparable absorption and geometry. This means a reduction of thermal lens effect and thus an increase of maximum allowed pump power loading. Previous literature reports some work made with structured slabs where higher doping was located in layers with lower pump radiation levels, in order to get a more uniform absorption. Interestingly our modeling indicates that reduced thermal effects are instead obtained when a higher doping is located close to the cooled surfaces.

Paper Details

Date Published: 7 May 2013
PDF: 12 pages
Proc. SPIE 8780, High-Power, High-Energy, and High-Intensity Laser Technology; and Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers, 87800J (7 May 2013); doi: 10.1117/12.2017380
Show Author Affiliations
A. Lapucci, Istituto Nazionale di Ottica, CNR (Italy)
M. Ciofini, Istituto Nazionale di Ottica, CNR (Italy)
L. Esposito, Institute of Science and Technology for Ceramics, CNR (Italy)
P. Ferrara, Istituto Nazionale di Ottica, CNR (Italy)
L. A. Gizzi, Istituto Nazionale di Ottica, CNR (Italy)
J. Hostaša, Institute of Science and Technology for Ceramics, CNR (Italy)
Institute of Chemical Technology, Prague (Czech Republic)
L. Labate, Istituto Nazionale di Ottica, CNR (Italy)
A. Pirri, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)
G. Toci, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)
M. Vannini, Istituto di Fisica Applicata Nello Carrara, CNR (Italy)


Published in SPIE Proceedings Vol. 8780:
High-Power, High-Energy, and High-Intensity Laser Technology; and Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers
Georg Korn; Luis Oliveira Silva; Joachim Hein, Editor(s)

© SPIE. Terms of Use
Back to Top