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    • 4. 发明授权
    • Optical 1.times.N and N.times.N switching matrix having a tree structure
    • 具有树结构的光1xN和NxN切换矩阵
    • US5892864A
    • 1999-04-06
    • US793297
    • 1997-03-11
    • Lothar StollMeinrad SchienleGustav Muller
    • Lothar StollMeinrad SchienleGustav Muller
    • G02F1/313H04B10/02H04Q3/52G02B6/35
    • H04Q11/0005G02F1/313G02F1/3132G02F1/3137
    • Optical 1.times.N and N.times.N switching matrix has a tree structure. In the case of 1.times.N switching matrices having a tree structure, in which an optical input (1.sub.0) is connected to N outputs (1.sub.1) by means of an optical waveguide structure (1) which branches like a tree, and in which an optical changeover switch (4) is arranged in each junction point (3) of the waveguide structure, it is intended to improve the crosstalk suppression. To this end, in each case one gate switch (5) is assigned to each output (1.sub.1) for optional release and blocking of this output (1.sub.1) as a function of a switching state of the changeover switch (4) of a junction point (3) from which a branching waveguide (11) is connected to this output (1.sub.1). An N.times.N switching matrix, which is also described, having greatly improved crosstalk suppression can be obtained with such 1.times.N switching matrices. The switching matrix is used in optical communications networks, for example telecommunications networks.
    • PCT No.PCT / DE95 / 01254 Sec。 371日期1997年3月11日 102(e)1997年3月11日PCT PCT 1995年9月13日PCT公布。 出版物WO96 / 08932 日期1996年3月21日光学1xN和NxN切换矩阵具有树结构。 在具有树结构的1xN切换矩阵的情况下,其中光输入(10)通过像树分支的光波导结构(1)连接到N个输出(11),并且其中光转换 开关(4)布置在波导结构的每个接合点(3)中,旨在改善串扰抑制。 为此,在每种情况下,一个门开关(5)被分配给每个输出端(11),用于根据连接点的转换开关(4)的切换状态来选择释放和阻塞该输出端(11) (3),分支波导(11)从该输出端(11)连接。 也可以使用这样的1xN开关矩阵来获得具有极大改善的串扰抑制的NxN开关矩阵。 交换矩阵用于光通信网络,例如电信网络。