公开(公告)号：EP0784853B1

公开(公告)日：1999-06-02

申请号：EP94928362.6

申请日：1994-09-15

申请人： International Business Machines Corporation

发明人： BONA, Gian-Luca ,  GERMANN, Roland ,  SALEMINK, Huub, Wilhelmus, Maria

IPC分类号： G11C21/00

CPC分类号： G11C13/04 ,  C07C233/47 ,  C07C235/12 ,  C07C237/12 ,  C07C323/59 ,  G11C21/00

摘要： The present invention concerns optical memories. Such an optical memory (30) comprises a data line (31) which is optically coupled via a directional waveguide coupler (33) to a circular memory loop (32). In addition, it comprises a pump line (35), which is employed in order to couple a refresh signal into the loop (32). As in case of the data line, the pump line is coupled via a directional waveguide coupler (34) to the loop (32). The counter propagating refresh light pulse provides for an amplification of the light pulse circulating in the memory loop being doped with Erbium ions. The length L of the memory loop (32) is chosen such that the circulation frequency of the light pulse in said loop (32) is equal to the clock frequency of the optical memory (30). The memory provides for individual manipulation of each stored optical bit.

公开(公告)号：EP0784853A1

公开(公告)日：1997-07-23

申请号：EP94928362.0

申请日：1994-09-15

申请人： International Business Machines Corporation

发明人： BONA, Gian-Luca ,  GERMANN, Roland ,  SALEMINK, Huub, Wilhelmus, Maria

IPC分类号： G02F1 ,  C07C233 ,  C07C235 ,  C07C237 ,  C07C323 ,  C07D233 ,  G11C21 ,  H01S3

CPC分类号： G11C13/04 ,  C07C233/47 ,  C07C235/12 ,  C07C237/12 ,  C07C323/59 ,  G11C21/00

摘要： The present invention concerns optical memories. Such an optical memory (30) comprises a data line (31) which is optically coupled via a directional waveguide coupler (33) to a circular memory loop (32). In addition, it comprises a pump line (35), which is employed in order to couple a refresh signal into the loop (32). As in case of the data line, the pump line is coupled via a directional waveguide coupler (34) to the loop (32). The counter propagating refresh light pulse provides for an amplification of the light pulse circulating in the memory loop being doped with Erbium ions. The length L of the memory loop (32) is chosen such that the circulation frequency of the light pulse in said loop (32) is equal to the clock frequency of the optical memory (30). The memory provides for individual manipulation of each stored optical bit.