公开(公告)号：US06014484A

公开(公告)日：2000-01-11

申请号：US15325

申请日：1998-01-29

Applicant: Gary S. Duck ,  Yihao Cheng ,  Calvin Si

Inventor： Gary S. Duck ,  Yihao Cheng ,  Calvin Si

IPC: G02B27/28 ,  G02B6/26 ,  G02B6/28 ,  G02B6/32 ,  G02B6/34

CPC classification number: G02B6/2937 ,  G02B6/2746 ,  G02B6/2848 ,  G02B6/29361 ,  G02B6/32 ,  G02B6/272

Abstract: A method and circuit is provided for more efficiently coupling light between two optical waveguides such as optical fibres. When the two waveguides are coupled to spaced apart collimating lenses such as GRIN lenses, the beam propagating between the spaced part lenses may be shifted. In this instance light can more efficiently be coupled out of the output optical fibre if it is angled with respect to the optical axis of the GRIN lens to which it is coupled. This invention provides an output fibre that is non-parallel with the optical axis of the lens it is coupled thereto.

Abstract translation: 提供了一种方法和电路，用于在诸如光纤之类的两个光波导之间更有效地耦合光。 当两个波导耦合到诸如GRIN透镜的间隔开的准直透镜时，在间隔的部分透镜之间传播的光束可能被偏移。 在这种情况下，如果相对于与其耦合的GRIN透镜的光轴成角度，则光可以更有效地耦合到输出光纤外。 本发明提供一种输出光纤，其不与其与其耦合的透镜的光轴平行。

公开(公告)号：US5878176A

公开(公告)日：1999-03-02

申请号：US917102

申请日：1997-08-25

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B6/26 ,  G02B27/28 ,  G02F1/09 ,  G02B6/00

CPC classification number: G02B6/2746 ,  G02B27/283 ,  G02F1/093

Abstract: A multi-port optical circulator for transmitting light from incoming and outgoing ports circularly includes one or more birefringent crystal plates disposed adjacent to one another for dividing an input beam into two beams having orthogonal polarizations and for combining two beams having orthogonal polarizations into a singe beam. Polarization beam splitting cubes introduce a beam to an opposite direction depending on the direction of the polarization of the beam and thereby substantially reflecting only one of s and p-polarizations of the beam. A polarization rotator between the first dividing and combining birefringent crystal and said polarization dependent beam splitting cube makes two orthogonal polarization vectors parallel or the two parallel polarization vectors orthogonal to one another.

Abstract translation: 用于从入口和出口端口圆周传播光的多端口光循环器包括一个或多个彼此相邻布置的双折射晶体板，用于将输入光束分成具有正交偏振的两个光束，并将具有正交偏振的两个光束组合成单个光束 。 偏振分束立方体根据光束的偏振方向将光束引向相反的方向，从而基本上仅反射光束的s和p偏振中的一个。 在第一分割和组合双折射晶体和所述偏振相关光束分裂立方体之间的偏振旋转器使得两个正交偏振矢量平行或两个平行偏振矢量相互正交。

公开(公告)号：US6055112A

公开(公告)日：2000-04-25

申请号：US95065

申请日：1998-06-10

Applicant: Margot Campbell-Miller ,  Brian S. Kawasaki ,  Yihao Cheng ,  Nebojsa Galic ,  Gary Pomerant

Inventor： Margot Campbell-Miller ,  Brian S. Kawasaki ,  Yihao Cheng ,  Nebojsa Galic ,  Gary Pomerant

IPC: G02B6/293 ,  G02B5/20 ,  G02B6/34 ,  G02B3/00 ,  G02B6/18

CPC classification number: G02B6/29364 ,  G02B5/20 ,  G02B6/2937

Abstract: A multi-pass optical filter using two identical filters provides narrower band filtering by double filtering an optical signal passing therethrough. Although passing a beam of light at an optical filter having a substantially thick optical thickness is known to have significant coupling losses due to angular misalignment of the output beam and the receiving optical fibre, it has been found that twice filtering in the conventional manner by serially coupling two same filters increases coupling losses. However, this invention provides a coupling arrangement wherein losses are significantly lessened by offsetting the axes of the lensed filters such that the beam exiting the first filter couples into the second filter as it would be reflected backward into the first filter.

Abstract translation: 使用两个相同滤波器的多通滤光器通过对通过其中的光信号进行双重滤波来提供较窄带滤波。 已知由于输出光束和接收光纤的角度偏移，通过具有基本上厚的光学厚度的滤光器的光束具有显着的耦合损耗，已经发现以常规方式串联地进行两次滤波 耦合两个相同的滤波器增加耦合损耗。 然而，本发明提供了一种耦合装置，其中通过偏置透镜滤光器的轴来显着减少损耗，使得离开第一滤光器的光束将被反射入第一滤光器而耦合到第二滤光器中。

公开(公告)号：US5930422A

公开(公告)日：1999-07-27

申请号：US198500

申请日：1998-11-24

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B6/26 ,  G02B5/30

CPC classification number: G02B6/2746

Abstract: A compact non-reciprocal optical waveguide-circulating device comprising three optical waveguides disposed along side one another at an input end adjacent a thin birefringent crystal to which they are optically coupled. The circulating device also includes at a distal end, a mirror for reflecting light backwards and providing a folded configuration. The device is capable of accepting a non-collimated beam of light that is launched from the input end through the birefringent crystal and rotating elements. By providing end faces at one end of the waveguides that are mode field expanded, light is effectively coupled between the waveguides and the adjacent crystal.

Abstract translation: 一种紧凑的不可逆的光波导循环装置，包括在与光学耦合的薄双折射晶体相邻的输入端处彼此相邻布置的三个光波导。 循环装置还包括在远端，用于向后反射光并提供折叠构型的反射镜。 该装置能够接受通过双折射晶体和旋转元件从输入端发射的非准直光束。 通过在模场扩展的波导的一端提供端面，光被有效地耦合在波导和相邻晶体之间。

公开(公告)号：US6091866A

公开(公告)日：2000-07-18

申请号：US144447

申请日：1998-09-01

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B5/30 ,  G02B6/26 ,  G02B6/00

CPC classification number: G02B6/2746 ,  G02B5/3083

Abstract: A multi-stage optical isolating device having at least three stages includes birefringent crystals for separating shifting and combining an incoming beam of light into orthogonal polarized beams. The multi-stage device also includes at least three Faraday rotators that rotate incoming light propagating through the device in a same direction. The inclusion of a reciprocal rotator in the form of a half-wave plate advantageously obviates orienting the Faraday rotators differently.

Abstract translation: 具有至少三级的多级光隔离装置包括用于分离移动并将入射光束组合成正交偏振光束的双折射晶体。 多级装置还包括至少三个法拉第旋转器，其以相同的方向旋转通过装置传播的入射光。 包含半波形形式的往复旋转器有利地避免了对法拉第旋转器的定向不同。

公开(公告)号：US6059462A

公开(公告)日：2000-05-09

申请号：US28880

申请日：1998-02-24

Applicant: Jozef Finak ,  Neil Teitelbaum ,  Yihao Cheng

Inventor： Jozef Finak ,  Neil Teitelbaum ,  Yihao Cheng

IPC: G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02B6/38

CPC classification number: G02B6/2937 ,  G02B6/32

Abstract: The present invention relates to a coupling element for coupling between optical elements, for instance a ferrule encased fiber end and a lens, two lenses, or filter and lens assemblies, which provides a reliable joint with a determined spacing and angular orientation between them if needed. Advantageously, the coupling in accordance with the present invention does not obscure optical transmission through the coupling with an epoxy layer. A stand off element is provided which has opposite reference surfaces for joining the end faces of the optical elements and a central aperture, slot or equivalent open area for light transmission. In use the open area is aligned, for example with the fiber end and the desired port in the lens. Adhesive connection can be provided between the opposite surfaces of the stand off element and the coupling end faces of the optical elements. No epoxy is applied over the open area. Other securing methods such as external securing elements can be used. Alignment is established by the planar surfaces of the stand off element. The separation between elements can be accurately established by selecting the desired thickness between faces of the stand off element. Alternatively, the surfaces of the stand off element may be angled to compliment the surfaces of the elements, or to provide an accurate angled coupling. Loss is reduced by not transmitting light through an epoxy layer.

Abstract translation: 本发明涉及用于在光学元件之间耦合的耦合元件，例如套圈封装的光纤端和透镜，两个透镜或滤光器和透镜组件，其在需要时提供具有确定的间距和角度定向的可靠接头 。 有利地，根据本发明的联接器不会通过与环氧树脂层的联接来遮蔽光学传输。 提供了一个支架元件，其具有用于连接光学元件的端面的相对的参考表面和用于光透射的中心孔，槽或等效的开口区域。 在使用中，开口区域对齐，例如与光纤端部和镜头中的所需端口对齐。 可以在支架元件的相对表面和光学元件的联接端面之间提供粘合剂连接。 在开放区域没有施加环氧树脂。 可以使用诸如外部固定元件的其它固定方法。 对准由支架元件的平面形成。 可以通过在支架元件的表面之间选择期望的厚度来精确地建立元件之间的间隔。 或者，支架元件的表面可以成角度以补偿元件的表面，或者提供精确的成角度的联接。 通过不透过环氧树脂层的光来减少损失。

公开(公告)号：US6055104A

公开(公告)日：2000-04-25

申请号：US82517

申请日：1998-05-21

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B27/28 ,  G02B6/26 ,  G02B6/28 ,  G02B6/32 ,  G02B6/34 ,  G02B5/30 ,  G02B6/00

CPC classification number: G02B6/2848 ,  G02B27/283 ,  G02B6/266 ,  G02B6/272 ,  G02B6/2746 ,  G02B6/2773 ,  G02B6/2937 ,  G02B6/29394 ,  G02B6/32

Abstract: A polarization beam splitter combiner uses a birefringent crystal that is a fraction of the size of conventional crystals used in similar devices. Since the crystal is considerably shorter in length, the beam passing through the crystal can be uncollimated, spreading very little from one end to the other. Launching uncollimated beams through a short small crystal obviates the requirement for lenses at the end face of the crystal having two waveguides coupled thereto. Since lenses are not required the waveguides at the input/output end face can be very closely spaced apart. Conventional lensed devices utilizing a pair of lenses at an input/output end face must be considerably larger in order to accommodate the lenses and resulting collimated beams.

Abstract translation: 偏振分束器组合器使用双折射晶体，其是类似器件中使用的常规晶体尺寸的一部分。 由于晶体的长度要短得多，所以通过晶体的光束可以被无约束，从一端扩展到另一端。 通过短的小晶体发射未经准备的光束，避免了在具有耦合到其上的两个波导的晶体的端面处的透镜的需求。 由于不需要透镜，输入/输出端面处的波导可以非常紧密地间隔开。 在输入/输出端面处使用一对透镜的传统透镜装置必须相当大以容纳透镜和所得到的准直光束。

公开(公告)号：US5991076A

公开(公告)日：1999-11-23

申请号：US942496

申请日：1997-10-02

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B27/28 ,  G02B6/26 ,  G02B6/28 ,  G02B6/32 ,  G02B6/34 ,  G02B5/30

CPC classification number: G02B6/2746 ,  G02B6/2848 ,  G02B6/32 ,  G02B6/272 ,  G02B6/2937

Abstract: An at least 3-port optical circulator has first group of optical components, and a second group of optical components, the first group being separated from the second group by an optical distance "1". Each group of optical components has a divider and combiner for dividing an input beam into two beams having orthogonal polarizations and for combining two beams having orthogonal polarizations into a single beam. Furthermore, each group has a GRIN lens for at least substantially collimating or focussing input light, and a polarization rotator between the first divider and combiner and the GRIN lens for making two orthogonal polarization vectors parallel or the two parallel polarization vectors orthogonal to one of or both of the first and second group of optical elements having beam shifting means disposed to shift two beams having a predetermined same polarization. The beam shifting means are of a thickness and orientation so that a beam of light that propagates from a first port sequentially to a second port and from the second port sequentially to a third port are shifted a distance equal to the distance between the optical axes of the first and the third ports.

Abstract translation: 至少3端口光循环器具有第一组光学部件和第二组光学部件，第一组通过光学距离“1”与第二组分离。 每组光学部件具有用于将输入光束分成具有正交偏振的两个光束并用于将具有正交偏振的两个光束组合成单个光束的分割器和组合器。 此外，每个组具有用于至少基本上准直或聚焦输入光的GRIN透镜，以及在第一分割器和组合器与GRIN透镜之间的偏振旋转器，用于使两个正交偏振矢量平行或两个平行偏振矢量正交于 具有光束移动装置的第一组光学元件和第二组光学元件都设置成移动具有预定相同极化的两束光束。 光束移动装置具有厚度和取向，使得从第一端口顺序地传播到第二端口并且从第二端口顺序地传播到第三端口的光束被移动距离等于光轴的光轴之间的距离 第一和第三个港口。