公开(公告)号：EP1709713A1

公开(公告)日：2006-10-11

申请号：EP04812473.9

申请日：2004-11-30

申请人： COHERENT, INC.

发明人： DEMARIA, Anthony, J. ,  NEWMAN, Leon, A. ,  SEQUIN, Vernon

IPC分类号： H01S3/00 ,  H01S3/23

CPC分类号： G02B27/0927 ,  B23K26/0604 ,  B23K26/067 ,  B23K26/0732 ,  B23K26/0736 ,  G02B27/0977 ,  H01S3/0315 ,  H01S3/08031 ,  H01S3/10092 ,  H01S3/105 ,  H01S3/2232 ,  H01S3/2383

摘要： Multiple laser beams, each having a shape such as a Gaussian profile (200), can be incoherently combined to obtain a shaped, flat top laser beam (300, 400). The combined laser beams can provide power levels necessary for material processing applications such as annealing, drilling, and cutting, while minimizing the amount of unused power. The lasers can be positioned in an array (700, 800) in order to shape the flat top beam, and can be staggered in position where necessary to give each output beam an equal beam path length. The relative frequencies and/or powers of the lasers can be adjusted to control the flatness and stability of the incoherently combined beam.