公开(公告)号：EP0917776B1

公开(公告)日：2006-07-05

申请号：EP97935667.2

申请日：1997-08-07

申请人： Mears, Robert Joseph

发明人： MEARS, Robert, Joseph ,  COHEN, Adam, David ,  WARR, Stephen, Thomas ,  PARKER, Michael, Charles

IPC分类号： H04B10/18

CPC分类号： H04B10/25073 ,  G02F1/141 ,  G02F1/292 ,  G02F2203/055 ,  G03H1/0005 ,  H04J14/0221

摘要： A holographic filter for an optical communication system is configurable to provide signal power equalisation for a number of optical signals or signal channels in a wavelength division multiplexed system.

公开(公告)号：EP0783713B2

公开(公告)日：2007-02-14

申请号：EP95932845.1

申请日：1995-09-29

申请人： Mears, Robert Joseph

发明人： MEARS, Robert, Joseph ,  WARR, Stephen, Thomas ,  PARKER, Michael, Charles

IPC分类号： G02B5/20

CPC分类号： G02F1/31 ,  G02B5/203 ,  G02F1/139 ,  G02F1/141 ,  G02F1/292 ,  G02F2203/055 ,  G02F2203/06 ,  G02F2203/12 ,  G02F2203/22 ,  G02F2203/50 ,  G03H1/0005 ,  G03H1/2294

摘要： A tunable optical wavelength selective filter comprises a dynamic holographic diffraction element (3) in combination with a fixed diffraction grating or hologram (2). The dynamic diffraction element (3) is preferably implemented as an electronically controlled image displayed on a pixelated spatial light modulator and in particular a spatial light modulating using opto-electronic integrated circuits fabricated using silicon VLSI technology and integrated with ferro-electric liquid crystals. Amongst other uses, the filter can be implemented to form a digitally tunable laser.