公开(公告)号：US07477827B2

公开(公告)日：2009-01-13

申请号：US12022776

申请日：2008-01-30

申请人： Miaoqing Wang ,  Yatao Yang ,  Ting Xue ,  Yunhui Sun

发明人： Miaoqing Wang ,  Yatao Yang ,  Ting Xue ,  Yunhui Sun

IPC分类号： G02B6/00

CPC分类号： G02B6/34 ,  G02B6/266

摘要： A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.

摘要翻译： 公开了一种可变光衰减器，其在保持其基本上与波长无关的极化的同时衰减光束。 光束被由具有锯齿状边缘的阻挡条纹光栅图案化的滤光片衰减，其分别部分地阻挡并部分地透射光束。 锯齿边缘提供低偏振相关损耗。 沿滤波器的长度，阻挡条纹和孔径宽度的标记与空间比增加。 通过沿其长度的滤波器的线性平移可以将衰减改变为期望值。 具有导螺杆的步进电机可以提供适当的线性平移以使过滤器具有锁定特性。

公开(公告)号：US20080205845A1

公开(公告)日：2008-08-28

申请号：US12022776

申请日：2008-01-30

申请人： Miaoqing Wang ,  Yatao Yang ,  Ting Xue ,  Yunhui Sun

发明人： Miaoqing Wang ,  Yatao Yang ,  Ting Xue ,  Yunhui Sun

IPC分类号： G02B6/00

CPC分类号： G02B6/34 ,  G02B6/266

摘要： A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.

摘要翻译： 公开了一种可变光衰减器，其在保持其基本上与波长无关的极化的同时衰减光束。 光束被由具有锯齿状边缘的阻挡条纹光栅图案化的滤光片衰减，其分别部分地阻挡并部分地透射光束。 锯齿边缘提供低偏振相关损耗。 沿滤波器的长度，阻挡条纹和孔径宽度的标记与空间比增加。 通过沿其长度的滤波器的线性平移可以将衰减改变为期望值。 具有导螺杆的步进电机可以提供适当的线性平移以使过滤器具有锁定特性。