公开(公告)号：US20040047583A1

公开(公告)日：2004-03-11

申请号：US10653918

申请日：2003-09-04

申请人： Hitachi Cable, Ltd.

发明人： Takafumi Chiba ,  Satoshi Takasugi ,  Tetsu Hasegawa ,  Hisato Uetsuka

IPC分类号： G02B006/00

CPC分类号： G02F1/225 ,  G02F1/0147 ,  G02F2001/0113 ,  G02F2203/48

摘要： A waveguide type variable optical attenuator has: a substrate; two optical circuits that are in parallel formed on the substrate, each of the optical circuits including two couplers that conduct the branching and coupling of light and are connected to the input port and output port of light and two waveguides through which the two couplers are connected; a polarization maintaining fiber one end of which is connected to the output port of one of the two optical circuits and the other end of which is connected to the input port of the other of the two optical circuits while being twisted 90null; and a heater that is provided around neighboring waveguides of the two optical circuits such that the neighboring waveguides share heat to be generated by the heater.

摘要翻译： 波导型可变光衰减器具有：基板; 平行地形成在基板上的两个光电路，每个光电路包括两个耦合器，两个耦合器传导光的分支和耦合，并连接到光的输入端口和输出端口以及两个耦合器所连接的两个波导 ; 保偏光纤的一端连接到两个光电路之一的输出端口，另一端连接到两个光电路中的另一个的输入端口，同时扭转90°; 以及设置在两个光电路的相邻波导周围的加热器，使得相邻波导共享由加热器产生的热量。