公开(公告)号：EP1037413A1

公开(公告)日：2000-09-20

申请号：EP00200774.8

申请日：2000-03-06

申请人： PIRELLI CAVI E SISTEMI S.p.A.

发明人： Boffi, Pierpaolo ,  Maier, Guido Alberto ,  Marazzi Lucia ,  Martinelli, Mario ,  Parolari, Paola ,  Piccinin, Davide ,  Sguazzotti, Alessandro

IPC分类号： H04B10/142 ,  G02B6/28

CPC分类号： H04B10/29 ,  G02B6/2861 ,  H04B10/67

摘要： Optical apparatus (100) for selecting a predetermined item of information from a coherent optical signal (1000) carrying a set of digital data, the said optical apparatus (100) comprising:

an input (10) for the said coherent optical signal (1000);
an optical-optical device (20) connected to the said input (10) for propagating the said coherent optical signal (1000), the said optical-optical device (20) being capable of generating a highly incoherent light having a predetermined coherence time and of transferring the said set of digital data carried by the said coherent optical signal (1000) to the said highly incoherent light in such a way as to provide at its output a highly incoherent optical signal (2000) carrying the said set of digital data,
an optical beam splitter (30) for cloning the said highly incoherent optical signal (2000) into at least two highly incoherent optical signals, the said optical beam splitter (30) having an input connected to the said optical-optical device (20) and at least two outputs for the said at least two highly incoherent optical signals;
at least two optical delay lines (40) connected to the said at least two outputs of the said optical beam splitter (30), the said at least two optical delay lines (40) having different wavelengths from each other, the difference in length between the said at least two optical delay lines (40) being such that the said at least two highly incoherent optical signals are delayed with respect to each other by a predetermined time, the said predetermined time being greater than the said predetermined coherence time of the said highly incoherent optical signal and being chosen in accordance with the said predetermined item of information which is to be selected;
an optical coupler (50) with at least two inputs connected to the said at least two optical delay lines (40), and one output, the said coupler being capable of recombining the said at least two highly incoherent optical signals into a single highly incoherent optical output signal (3000) having an intensity which is at a maximum in the presence of the said predetermined item of information which is to be selected.

摘要翻译： 光学设备（100），用于从相干光信号（1000）选择的信息的预定项目承载一组数字数据，所述的光学装置（100），包括：输入（10），用于将所述相干光信号（1000） ; 光光学装置（20）连接到用于传播所述相干光信号（1000），所述光光学装置（20）能够产生具有预定相干时间高度非相干光，并且所述输入端（10） 传递环的所述一组由所述相干光信号（1000）到所述高非相干光在谋求携带所述组的数字数据的一种方式，在它的输出，以提供高度的非相干光信号（2000）中进行数字数据的， 到用于所述高度非相干光信号（2000）克隆到至少两个高度非相干光信号的光分束器（30），具有输入所述光学分束器（30）连接到所述光光学装置（20）和 至少两个输出端的所述至少两个非相干高度光信号; 连接到所述光分束器（30）的所述至少两个输出端的至少两个光学延迟线（40），所述至少两个光学延迟线（40），具有从海誓山盟不同的波长，在之间的长度差 被检查的所述至少两个光学延迟线（40），DASS模具，所述至少两个高度非相干光信号由预定的时间延迟相对于海誓山盟，所述预定时间大于所述说的所述预定的相干时间大 高度非相干光信号，并与所有的信息将被选择的所述预定项目雅舞蹈被选择; 到光学耦合器（50）与连接到所述至少两个光学延迟线（40），至少有两个输入和一个输出，所述的耦合器能够重新组合所述至少两种高度不相干的光信号到一个单一的高度非相干的 具有强度的所有光输出信号（3000），其是在所有的信息的预定的所述物品是要被选择的存在最大值。