Laser

US5148443A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Keming Du · Aachen, DE
• Peter Loosen · Stolberg, DE
• Gerd Herziger · Rosdorf, DE

Key dates

• Filing date: Dec 17, 1990
• Grant date: Sep 15, 1992
• Expiry date: Dec 17, 2010

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/08059
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A laser has a beam path multiply folded by two resonator end mirrors and at east one reflector retroreflectively folding the laser beam. The laser axis is parallel displaced to the axis of a further reflector. In order to improve the laser beam quality while retaining its comparatively low adjustment sensitivity, the beam path is folded at least twice with the retroreflective reflector.