公开(公告)号：EP1176451A2

公开(公告)日：2002-01-30

申请号：EP01306080.1

申请日：2001-07-13

申请人： JDS Uniphase Inc. ,  JDS Uniphase Corporation

发明人： Wills, Gonzalo ,  Wall, Pierre D. ,  Chang, Kok-Wai ,  Jin, Fahong ,  Wang, Xinglong

IPC分类号： G02B27/28 ,  G02B5/30 ,  G02B1/08

CPC分类号： G02B6/2773 ,  G02B6/272 ,  G02B6/2746 ,  G02B6/32 ,  G02B27/283

摘要： The present invention relates to an isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmission of light in a reverse direction. As a splitter, a beam of light is separated through a birefringent material into sub-beams of orthogonal polarization components, and each sub-beam is passed through a non-reciprocal polarization rotator to rotate the polarization so that a reflected beam, or other counter-transmitted light cannot return on the same path through the birefringent material to the source. As a combiner, two separate beams of light are launched with known orthogonal polarizations into a first birefringent material, passed through a non-reciprocal polarization rotator and then combined as orthogonal polarizations into a single output port. Advantageously, by providing the splitting or combining function in a same isolating device, insertion losses are reduced and the device is smaller and more cost effective. As a further advantage, a polarization beam splitter/combiner is provided in which the optical path length for the two separated orthogonal polarizations traveling through a birefringent crystal is equal, while still permitting the economical use of birefringent crystals with an uncollimated beam of light.

摘要翻译： 本发明涉及一种孤立的偏振分束器或组合器，用于将来自不同输入的光连接到一个公共端口中，并将光束分成正交偏振。 在这两种操作模式中，分光器/合成器提供隔离，防止反向传输光。 作为分束器，通过双折射材料将光束分离成正交偏振分量的子光束，并且使每个子光束通过非互易偏振旋转器以旋转偏振，以便反射光束或其他计数器 透射光不能通过双折射材料返回到光源。 作为组合器，两个单独的光束以已知的正交偏振发射到第一双折射材料中，穿过非互易偏振旋转器，然后作为正交偏振组合成单个输出端口。 有利的是，通过在相同的隔离装置中提供分离或组合功能，插入损耗减小并且装置更小且更节省成本。 作为进一步的优点，提供了一种偏振分束器/组合器，其中，通过双折射晶体的两个分开的正交偏振的光路长度相等，同时仍然允许经济地使用具有未矫正光束的双折射晶体。

公开(公告)号：EP1176451A3

公开(公告)日：2002-03-20

申请号：EP01306080.1

申请日：2001-07-13

申请人： JDS Uniphase Inc. ,  JDS Uniphase Corporation

发明人： Wills, Gonzalo ,  Wall, Pierre D. ,  Chang, Kok-Wai ,  Jin, Fahong ,  Wang, Xinglong

IPC分类号： G02B27/28 ,  G02B5/30 ,  G02B1/08 ,  G02B6/28

CPC分类号： G02B6/2773 ,  G02B6/272 ,  G02B6/2746 ,  G02B6/32 ,  G02B27/283

摘要： The present invention relates to an isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmission of light in a reverse direction. As a splitter, a beam of light is separated through a birefringent material into sub-beams of orthogonal polarization components, and each sub-beam is passed through a non-reciprocal polarization rotator to rotate the polarization so that a reflected beam, or other counter-transmitted light cannot return on the same path through the birefringent material to the source. As a combiner, two separate beams of light are launched with known orthogonal polarizations into a first birefringent material, passed through a non-reciprocal polarization rotator and then combined as orthogonal polarizations into a single output port. Advantageously, by providing the splitting or combining function in a same isolating device, insertion losses are reduced and the device is smaller and more cost effective. As a further advantage, a polarization beam splitter/combiner is provided in which the optical path length for the two separated orthogonal polarizations traveling through a birefringent crystal is equal, while still permitting the economical use of birefringent crystals with an uncollimated beam of light.

摘要翻译： 本发明涉及一种用于将来自不同输入端的光连接到一个公共端口中并用于将光束分成正交偏振的隔离偏振分束器或组合器。 在这两种工作模式下，分离器/组合器提供隔离，防止光沿相反方向传播。 作为分光器，光束通过双折射材料分离成正交偏振分量的子光束，并且每个子光束通过非可逆偏振旋转器以旋转偏振，使得反射光束或其他反射器 发射光不能在通过双折射材料到源的相同路径上返回。 作为组合器，通过已知的正交偏振将两个单独的光束发射到第一双折射材料中，通过非倒数偏振旋转器，然后作为正交偏振组合成单个输出端口。 有利地，通过在相同的隔离装置中提供分离或组合功能，减少了插入损耗，并且该装置更小并且更具成本效益。 作为另一个优点，提供了偏振分束器/组合器，其中通过双折射晶体行进的两个分离的正交偏振的光程长度相等，同时仍然允许经济地使用未被准直的光束的双折射晶体。