公开(公告)号：EP1338063A1

公开(公告)日：2003-08-27

申请号：EP01967072.8

申请日：2001-09-05

申请人： PURUP-ESKOFOT A/S

发明人： PETERSEN, Paul, Michael

IPC分类号： H01S5/0683 ,  H01S5/14 ,  H01S3/105 ,  H01S3/08

CPC分类号： H01S5/141 ,  H01S5/0656 ,  H01S5/06821 ,  H01S5/0683 ,  H01S5/148 ,  H01S5/2036

摘要： A diode laser system providing a high-power laser beam with good spatial coherence, which can be focused to a small spot size over long distances and which has a good pointing stability. The laser system comprises a laser diode (301) adapted to emit a first light beam, where the first light beam comprises a plurality of spatial modes, selection means (304) adapted to select a predetermined part of the first light beam, and a reflector (306), where the laser diode and the reflector define a cavity and where the reflector is adapted to reflect the selected part of the first light beam back into the laser diode as a second light beam. The laser system is characterised in that the selection means is adapted to select a part of the first light beam corresponding to a spatial mode with a higher mode number than a spatial mode with maximum gain.