Application of Yb:YAG short pulse laser system

US6760356B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Gaylen V. Erbert · Livermore, US
• Subrat Biswal · Ann Arbor, US
• Joseph M. Bartolick · Livermore, US
• Brent C. Stuart · Fremont, US
• John K. Crane · Pleasanton, US
• Steve Telford · Livermore, US
• Michael D. Perry · Poway, US

Key dates

• Filing date: Apr 8, 2002
• Grant date: Jul 6, 2004
• Expiry date: May 28, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/1643
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A diode pumped, high power (at least 20W), short pulse (up to 2 ps), chirped pulse amplified laser using Yb:YAG as the gain material is employed for material processing. Yb:YAG is used as the gain medium for both a regenerative amplifier and a high power 4-pass amplifier. A single common reflective grating optical device is used to both stretch pulses for amplification purposes and to recompress amplified pulses before being directed to a workpiece.