公开(公告)号：EP1168035A2

公开(公告)日：2002-01-02

申请号：EP01303561.3

申请日：2001-04-19

申请人： JDS Uniphase Inc.

发明人： Delisle, Vincent ,  Wills, Gonzalo ,  Wall, Pierre D. ,  Hnatiw, Alan J.P. ,  Cheng, Yihao ,  Spicer, Dean Sheldon ,  McLaughlin, Sheldon

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

CPC分类号： G02B6/2706 ,  G02B6/12004 ,  G02B6/2773 ,  G02B6/32 ,  G02B27/283

摘要： This invention relates to elements such as birefringent crystals, which are used to separate a non-collimated input beam into two orthogonally polarized sub-beams or to combine two orthogonally polarized beams into a single beam. The optical device lessens or obviates the optical path length difference encountered in prior art devices and provides a polarization beam splitter / combiner that has substantially same optical path lengths for two split or combined beams propagating therethrough. Alternatively, the device is designed to provide a selected path length difference to compensate for polarization mode dispersion in other optical devices. The polarization beam splitter/combiner in accordance with the invention has a first uniaxial crystal having an o-ray path and an e-ray path and having the first port disposed at an end face thereof; a second uniaxial crystal having an o-ray path and an e-ray path, the e-ray path of the second uniaxial crystal being optically coupled with the o-ray path of the first uniaxial crystal and the o-ray path of the second uniaxial crystal being optically coupled with the e-ray path of the first uniaxial crystal. Alternatively, the axis of the second crystal is aligned in such a manner that the o- ray path is retarded by an extraordinary index of refraction of the crystal and the e-ray path is retarded by an ordinary index of refraction to equalize the optical path lengths.

摘要翻译： 本发明涉及诸如双折射晶体的元件，其用于将非准直输入光束分成两个正交偏振子光束或将两个正交偏振光束组合成单个光束。 该光学器件减少或消除了现有技术器件中遇到的光程长度差异，并提供了一种偏振分束器/组合器，其对于从中传播的两个分离或组合光束具有基本相同的光路长度。 或者，该器件被设计成提供选定的路径长度差以补偿其他光学器件中的偏振模色散。 根据本发明的偏振分束器/组合器具有第​​一单轴晶体，该第一单轴晶体具有o射线路径和e射线路径并且具有设置在其端面处的第一端口; 具有o射线路径和e射线路径的第二单轴晶体，第二单轴晶体的e射线路径与第一单轴晶体的o射线路径和第二单轴晶体的o射线路径光耦合 单轴晶体与第一单轴晶体的e射线路径光耦合。 或者，第二晶体的轴以这样的方式排列，即o射线路径被晶体的特殊折射率延迟，并且e射线路径被普通折射率延迟以均衡光路 长度。

公开(公告)号：EP1168035A3

公开(公告)日：2002-03-20

申请号：EP01303561.3

申请日：2001-04-19

申请人： JDS Uniphase Inc.

发明人： Delisle, Vincent ,  Wills, Gonzalo ,  Wall, Pierre D. ,  Hnatiw, Alan J.P. ,  Cheng, Yihao ,  Spicer, Dean Sheldon ,  McLaughlin, Sheldon

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

CPC分类号： G02B6/2706 ,  G02B6/12004 ,  G02B6/2773 ,  G02B6/32 ,  G02B27/283

摘要： This invention relates to elements such as birefringent crystals, which are used to separate a non-collimated input beam into two orthogonally polarized sub-beams or to combine two orthogonally polarized beams into a single beam. The optical device lessens or obviates the optical path length difference encountered in prior art devices and provides a polarization beam splitter / combiner that has substantially same optical path lengths for two split or combined beams propagating therethrough. Alternatively, the device is designed to provide a selected path length difference to compensate for polarization mode dispersion in other optical devices. The polarization beam splitter/combiner in accordance with the invention has a first uniaxial crystal having an o-ray path and an e-ray path and having the first port disposed at an end face thereof; a second uniaxial crystal having an o-ray path and an e-ray path, the e-ray path of the second uniaxial crystal being optically coupled with the o-ray path of the first uniaxial crystal and the o-ray path of the second uniaxial crystal being optically coupled with the e-ray path of the first uniaxial crystal. Alternatively, the axis of the second crystal is aligned in such a manner that the o- ray path is retarded by an extraordinary index of refraction of the crystal and the e-ray path is retarded by an ordinary index of refraction to equalize the optical path lengths.

摘要翻译： 本发明涉及诸如双折射晶体的元件，其用于将非准直输入光束分成两个正交极化子光束或将两个正交偏振光束组合成单个光束。 光学装置减轻或消除现有技术装置中遇到的光路长度差异，并提供对于通过其传播的两个分裂或组合光束具有基本上相同的光程长度的偏振分束器/组合器。 或者，该设备被设计成提供所选择的路径长度差以补偿其他光学设备中的偏振模式色散。 根据本发明的偏振分束器/组合器具有第​​一单轴晶体，其具有o射线路径和e射线路径，并且其第一端口设置在其端面; 具有o射线路径和e射线路径的第二单轴晶体，第二单轴晶体的e射线路径与第一单轴晶体的o射线路径和第二单轴晶体的o射线路径光学耦合， 单轴晶体与第一单轴晶体的e射线路径光学耦合。 或者，第二晶体的轴线以这样一种方式对准，使得该射线路径被晶体的非凡的折射率延迟，并且e-射线路径被普通折射率延迟以均衡光路 长度。