Pump light assembly for a disc laser

US8824522B2 · kind B2 · utility

Assignee

• TRUMPF Laser GmbH + Co. KG · DE

Inventors

• Sven-Silvius Schad · Rottweil, DE
• Alexander Killi · Trossingen, DE

Key dates

• Filing date: Feb 9, 2012
• Grant date: Sep 2, 2014
• Expiry date: Feb 9, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/094038
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A pump light assembly (6) for a disc laser (1), comprising: a focusing device, in particular a concave mirror (11), having a reflecting surface (10) for focusing a pump light beam (8) onto a laser-active medium (2), and a deflecting assembly for deflecting the pump light beam (8) between reflecting regions formed on the reflecting surface (10) and disposed in different angular regions about a central axis (12) of the reflecting surface (10). The deflecting device is configured to produce a deflection of the pump light beam (8) between in each case two of the reflecting regions with an optical path length (2 f+2 d1; 2 f+2 d2) that is greater than the optical path length (2f) in the case of telecentric imaging in order to compensate for a beam expansion of the pump light beam (8), caused by aberrations of the focusing device (11), in successive focusings onto the laser-active medium (2). The invention also relates to a disc laser (1) and to a method for pumping a laser-active medium (2).