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    CURVED WAVEGUIDE ELEMENT FOR CONNECTING SINGLEMODE OPTICAL WAVEGUIDES
    1.
    发明授权
    CURVED WAVEGUIDE ELEMENT FOR CONNECTING SINGLEMODE OPTICAL WAVEGUIDES 失效
    CROOKED光纤于连接MONO模光纤

    公开(公告)号：EP1002247B1

    公开(公告)日：2003-05-28

    申请号：EP97931977.9

    申请日：1997-08-04

    申请人： International Business Machines Corporation

    发明人： BONA, Gian-Luca ,  GERMANN, Roland ,  OFFREIN, Bert, Jan ,  SALEMINK, Huub, W., M.

    IPC分类号： G02B6/12

    CPC分类号： G02B6/12007 ,  G02B6/26 ,  G02B2006/12119 ,  G02B2006/12195

    摘要： A singlemode lightwaveguide-coupling element is positioned between an initial waveguide section (10) which there has a basic final width (W0f) and a final waveguide section (30) which there has a basic inital width (Wn+li) which is bigger than the basic final width (W0f). The lightwave directions of both waveguide sections are inclined at a predetermined total angle ( DELTA alpha ) towards each other. Starting from the inital waveguide section, the lightwaveguide element comprises intermediate waveguide sections each of which at its end has a lightwave direction which is inclined towards the lightwave direction at its opposite end at an inclination angle ( DELTA alpha v) such that the sum of all inclination angles equals the predetermined total angle ( DELTA alpha ). Each of the intermediate waveguide sections at its end which is directed towards the directly preceding waveguide section, has an initial width (Wvi) and at its opposite end has a final width (Wvf) which is bigger than the initial width (Wvi) by a width difference ( DELTA Wv) which follows the equation DELTA Wv= DELTA alpha v(Wn+li-W0f)/ DELTA alpha . For each intermediate waveguide section and for the final waveguide section its initial width (Wvi) equals the final width (Wv-1f) of the directly preceding waveguide section. Each intermediate waveguide section further has a length (1v) that is constant or steadily decreasing dependent on the final width (Wvf).

    OPTICAL MEMORY FOR STORING DATA
    8.
    发明授权
    OPTICAL MEMORY FOR STORING DATA 失效
    光存储用于数据存储

    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.