公开(公告)号：EP1226637B1

公开(公告)日：2006-12-27

申请号：EP00960947.0

申请日：2000-09-13

申请人： YEDA RESEARCH AND DEVELOPMENT CO. LTD.

发明人： FRIESEM, Asher, A., Weizmann Institute of Science ,  BLIT, Shmuel ,  ORON, Ram ,  HASMAN, Erez ,  DAVIDSON, Nir

IPC分类号： H01S3/10

CPC分类号： H01S3/08036 ,  H01S3/08054 ,  H01S3/082 ,  H01S3/106 ,  H01S2301/20 ,  H01S2301/203

摘要： An optical resonator supporting two sets of simultaneously co-existent oscillation modes (30 and 31), having polarizations orthogonal to each other. Mode control elements (28 and 29), such as apertures and phase elements, are introduced into the resonato to allow only preferred modes to exist. The placement and orientation of the sets are designed such that the high intensity zones of one set fall on the nodes or low intensity zones of the other set in an interlaced pattern. Thus, in a laser resonator, better utilization of the gain medium (24) is achieved and the beam quality and brightness over multimode lasing are improved. This configuration improves the performance of high Fresnel number resonators, in both pulsed and continuous lasers, for applications such as scribing, drilling, cutting, target designation and rangefinding. An application of the intra-cavity coherent summation of orthogonally polarized modes is described, whereby azimuthally or radially polarized beams may be obtained.

公开(公告)号：EP1226637A1

公开(公告)日：2002-07-31

申请号：EP00960947.0

申请日：2000-09-13

申请人： YEDA RESEARCH AND DEVELOPMENT CO. LTD.

发明人： FRIESEM, Asher, A.Weizmann Institute of Science ,  BLIT, Shmuel ,  ORON, Ram ,  HASMAN, Erez ,  DAVIDSON, Nir

IPC分类号： H01S3/10

CPC分类号： H01S3/08036 ,  H01S3/08054 ,  H01S3/082 ,  H01S3/106 ,  H01S2301/20 ,  H01S2301/203

摘要： An optical resonator supporting two sets of simultaneously co-existent oscillation modes (30 and 31), having polarizations orthogonal to each other. Mode control elements (28 and 29), such as apertures and phase elements, are introduced into the resonato to allow only preferred modes to exist. The placement and orientation of the sets are designed such that the high intensity zones of one set fall on the nodes or low intensity zones of the other set in an interlaced pattern. Thus, in a laser resonator, better utilization of the gain medium (24) is achieved and the beam quality and brightness over multimode lasing are improved. This configuration improves the performance of high Fresnel number resonators, in both pulsed and continuous lasers, for applications such as scribing, drilling, cutting, target designation and rangefinding. An application of the intra-cavity coherent summation of orthogonally polarized modes is described, whereby azimuthally or radially polarized beams may be obtained.

公开(公告)号：EP0886897B1

公开(公告)日：2004-11-24

申请号：EP97904559.8

申请日：1997-02-18

申请人： YEDA RESEARCH AND DEVELOPMENT CO. LTD.

发明人： DANZIGER, Yochay ,  HASMAN, Erez ,  DAVIDSON, Nir ,  FRIESEM, Asher, A.

IPC分类号： H01S3/098

CPC分类号： H01S3/0804 ,  H01S3/03 ,  H01S3/061 ,  H01S3/0805 ,  H01S3/08068 ,  H01S3/082 ,  H01S3/083 ,  H01S3/0941 ,  H01S3/10076 ,  H01S3/2232 ,  H01S2301/20

公开(公告)号：EP0858608A2

公开(公告)日：1998-08-19

申请号：EP96928667.0

申请日：1996-09-04

申请人： YEDA RESEARCH AND DEVELOPMENT CO. LTD.

发明人： DANZIGER, Yochay ,  HASMAN, Erez ,  FRIESEM, Asher, A.

IPC分类号： G02B5

CPC分类号： G02B5/1876

摘要： A multilevel diffractive optical element (DOE) comprising a base (10) and a plurality of phase zones (1), the phase zones being defined by a modulation depth (d', d') and a number of phase levels (κ', κ') of phase levels (12), the number of phase levels per phase zone varying at different locations (11', 11') of the element (DOE), characterised in that the variation of said number of phase levels is such that the modulation depth, at said different locations, varies in a predetermined manner.