公开(公告)号：US07177511B2

公开(公告)日：2007-02-13

申请号：US10415474

申请日：2001-10-23

申请人： Paolo Vavassori ,  Alessandro Iommi

发明人： Paolo Vavassori ,  Alessandro Iommi

IPC分类号： G02B6/02 ,  G02B6/36

CPC分类号： G02B6/02047 ,  G02B6/02052 ,  G02B6/2552 ,  G02B6/29352 ,  G02B6/2938

摘要： An optical fiber filter includes an optical fiber, a pair of first coupling regions, and a phase-shift region. The optical fiber includes a core and a cladding. An optical signal can pass through the optical fiber. The first coupling regions are formed in the optical fiber, at a predefined mutual distance, for producing power transfer between first and second propagation modes of the optical signal. The phase-shift region is defined by a section of the optical fiber, disposed between the first coupling regions, for producing a phase shift between the first and second propagation modes of the optical signal. In the first coupling regions, the optical fiber includes, in cross-section, an asymmetrical refractive index profile. A related optical fiber filtering device, optical fiber, process for producing an optical filter, optical amplifier, optical telecommunications system, optical fiber modal coupler, and method for filtering an optical signal are also disclosed.

摘要翻译： 光纤滤波器包括光纤，一对第一耦合区域和相移区域。 光纤包括芯和包层。 光信号可以通过光纤。 第一耦合区域以预定的相互距离形成在光纤中，用于在光信号的第一和第二传播模式之间产生功率传输。 相移区域由设置在第一耦合区域之间的光纤部分限定，用于在光信号的第一和第二传播模式之间产生相移。 在第一耦合区域中，光纤在横截面中包括不对称的折射率分布。 还公开了一种相关的光纤滤波装置，光纤，用于制造滤光器的方法，光放大器，光通信系统，光纤模态耦合器以及用于滤波光信号的方法。