Beam quality of a high-power CO2 laser MOPA system

被引：3

作者：

Riede, W ^{[1
]}

Mayerhofer, W ^{[1
]}

机构：

[1] DLR, Inst Tech Phys, D-70569 Stuttgart, Germany

来源：

OPTICS AND LASER TECHNOLOGY | 1998年 / 30卷 / 08期

关键词：

beam quality; MOPA system; M-2; parameter;

D O I：

10.1016/S0030-3992(98)00082-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, the effects of amplification of diffraction-limited pulsed CO2 laser radiation over several meters of amplification length on beam quality and pointing stability are documented. Millijoule pulses are amplified up to 3 J. Generation and amplification of the 10 mu m wavelength pulses were performed in the discharge volume of an e-beam sustained CO2 laser. Beam quality is measured according to the ISO/DIS 11146 standard in terms of the beam quality factor M-2. Fluence distributions were recorded with a beam analysing system of 100 mu m spatial resolution. M-2 parameter values ranged up to 1.55 for amplified pulse energies of 3 J. The necessity of beam-quality restoring techniques is inferred for the multijoule pulse energy regime. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：491 / 496

页数：6