Lens transformations of high power solid-state laser beams

✍ Scribed by A. Khizhnyak; M. Lopiitchouk; I. Peshko

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 411 KB
• Volume: 30
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(98)00067-x

✦ Synopsis

Beam parameters of 300 W-class CW Nd:YAG lasers with double pump cavities have been investigated. The calculations have demonstrated that in the strongly pumped operating laser the amplitude of stresses in the rod can be decreased by a factor of approximately 1.5. A multibeam model of high power beam structure has been proposed. It has been shown theoretically and experimentally that 1.4±1.8 times reduction of the beam parameter product of a complex non-Gaussian beam may be achieved by placing a lens with a strength and location determined by laser parameters. An integrated parameters product has been proposed to describe the complex beams. In the range of possible pumping levels (3±10 kW) the output full divergence angle changed from 2 up to 23±28 mrad but in image space of the lens the variations of this value were no more than 212%.