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：US5629995A

公开(公告)日：1997-05-13

申请号：US595487

申请日：1996-02-01

Applicant: Gary S. Duck ,  Yihao Cheng

Inventor： Gary S. Duck ,  Yihao Cheng

IPC: G02B6/34 ,  H04J14/02 ,  G02B6/28

CPC classification number: G02B6/2938 ,  G02B6/2937 ,  H04J14/02

Abstract: A wavelength filter for use with optical fibers comprises a plurality of filter units, each unit comprising first and second collimating lenses separated by a filter element, the filter elements of the two units being capable of passing first and second wavelengths respectively, and each unit being such as to reflect light transmitted by the filter element of each of the other units. A first of the units has its first lens connected to an input optical fiber and also connected to a first connecting optical fiber positioned so that one of these optical fibers is capable of receiving light from the other fiber reflected off the filter element of the first unit. The first unit has its second lens connected to a second connecting optical fiber carrying light of a first wavelength transmited from the input optical fiber through the first filter unit. A second of the units has its first lens connected to the first connecting optical fiber and its second lens connected to the second connecting optical fiber and to an output optical fiber in transmitted light relationship with the first connecting optical fiber. The second connecting optical fiber and the output optical fiber are positioned so that one of these latter fibers is capable of receiving light from the other reflected off the filter element of the second unit.

Abstract translation: 用于光纤的波长滤波器包括多个滤波器单元，每个单元包括由滤波器元件隔开的第一和第二准直透镜，两个单元的滤波器元件能够分别通过第一和第二波长，并且每个单元为 以便反射由每个其它单元的过滤元件传输的光。 第一单元具有连接到输入光纤的第一透镜，并且还连接到第一连接光纤，第一连接光纤被定位成使得这些光纤中的一个能够接收来自第一单元的滤波器元件反射的另一光纤的光 。 第一单元具有连接到第二连接光纤的第二透镜，第二连接光纤承载从输入光纤通过第一滤波器单元传输的第一波长的光。 第二单元具有连接到第一连接光纤的第一透镜和连接到第二连接光纤的第二透镜以及与第一连接光纤透射光关联的输出光纤。 第二连接光纤和输出光纤被定位成使得这些后一个光纤中的一个能够接收来自第二单元的滤波器元件的另一个反射的光。

公开(公告)号：US5574596A

公开(公告)日：1996-11-12

申请号：US442368

申请日：1995-05-16

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B5/30 ,  G02F1/09

CPC classification number: G02F1/093 ,  G02B5/3083

Abstract: The optical circulator according to the present invention comprises two birefringent crystal end-plates, non-reciprocal Faraday rotators inserted between birefringent crystal plates, and a pair of matched birefringent crystal plates disposed between the rotators. The first birefringent crystal end-plate functions as a dividing and combining means for dividing a beam into two beams of orthogonal electric field vectors from different paths into one on the same path. The pair of matched birefringent crystal plates serve as beam path determining means shifting a beam to a different direction depending on the direction of the electric field vector and the propagation. The pair of crystal plates are substantially identical but oppositely oriented, such that the pair of means have opposite beam shifted directions.

Abstract translation: 根据本发明的光循环器包括两个双折射晶体端板，插入在双折射晶体板之间的不可逆法拉第转子和设置在转子之间的一对匹配的双折射晶体板。 第一双折射晶体端板用作分割和组合装置，用于将光束分成两束来自不同路径的正交电场矢量到同一路径上的一个。 一对匹配的双折射晶体板用作根据电场矢量和传播的方向将光束移动到不同方向的光束路径确定装置。 该对晶体板基本上相同但相反地取向，使得该对装置具有相反的光束偏移方向。

公开(公告)号：US5539577A

公开(公告)日：1996-07-23

申请号：US442362

申请日：1995-05-16

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

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

IPC: G02B6/28 ,  G02B6/34 ,  G02B27/14 ,  G02B1/10 ,  G02B6/26 ,  G02B6/32

CPC classification number: G02B6/29358 ,  G02B6/2817 ,  G02B6/2937

Abstract: A device for splitting an optical beam into two beams propagating along different optical paths, is provided. The device includes a pair of graded index collimating lenses having their planar collimating ends aligned such that they are both inwardly facing and share a common optical axis. A partially transmitting partially reflective material is disposed between the lenses. At least one of the planar endfaces of the collimating ends are wedge shaped such that a non-zero angle is formed between the two endfaces. This non-zero angle reduces the effect of unwanted optical interference.

Abstract translation: 提供了一种用于将光束分成沿着不同光路传播的两个光束的装置。 该装置包括一对分级折射准直透镜，其平面准直端对准，使得它们都向内并且共享共同的光轴。 部分透射部分反射材料设置在透镜之间。 准直端的平面端面中的至少一个是楔形的，使得在两个端面之间形成非零角。 该非零角度减少了不需要的光学干涉的影响。

公开(公告)号：US06711311B2

公开(公告)日：2004-03-23

申请号：US09836465

申请日：2001-04-18

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

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

IPC: G02B600

CPC classification number: G02B6/2706 ,  G02B6/12004 ,  G02B6/2773 ,  G02B6/32 ,  G02B27/283

Abstract: 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.

Abstract translation: 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它光学设备中的偏振模色散。 根据本发明的偏振分束器/组合器具有第​​一单轴晶体，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o射线路径被晶体的非凡折射率延迟，并且e-光路径被普通的折射率延迟以均衡光路 长度

公开(公告)号：US06587266B2

公开(公告)日：2003-07-01

申请号：US09930266

申请日：2001-08-16

Applicant: Kuochou Tai ,  Kok-Wai Chang ,  Jyehong Chen ,  Thomas Ducellier ,  Yihao Cheng

Inventor： Kuochou Tai ,  Kok-Wai Chang ,  Jyehong Chen ,  Thomas Ducellier ,  Yihao Cheng

IPC: G02B530

CPC classification number: H01S3/06754 ,  G02B6/2746 ,  G02F1/093 ,  G02F2201/17 ,  H01S3/10023 ,  H01S2301/04 ,  Y10S372/703

Abstract: Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a second set of optical signals from passing thereto. The bi-directional wavelength interleaving optical isolators also pass the second set of optical signals (e.g., ITU odd channels) from the second port to the first port, while preventing the first set of optical signals from passing thereto. Thus, the bi-directional wavelength interleaving optical isolator can provide bi-directional communications by passing a first set of signals in a first direction and a second set of signals in a second direction.

Abstract translation: 双向波长交织光隔离器提供将第一组光信号（例如，ITU甚至信道）从第一端口传递到第二端口的能力，同时防止第二组光信号通过。 双向波长交织光隔离器还将第二组光信号（例如，ITU奇信道）从第二端口传递到第一端口，同时防止第一组光信号通过。 因此，双向波长交织光隔离器可以通过在第一方向上传递第一组信号和在第二方向上传递第二组信号来提供双向通信。

公开(公告)号：US6157485A

公开(公告)日：2000-12-05

申请号：US358444

申请日：1999-07-22

Applicant: Yihao Cheng

Inventor： Yihao Cheng

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

CPC classification number: G02B6/2937 ,  G02B27/283 ,  G02B6/2746 ,  G02B6/2848 ,  G02B6/29359 ,  G02B6/29361 ,  G02B6/29394 ,  G02B6/32 ,  G02B6/272

Abstract: An optical device that includes a filter element which affects a beam incident thereon by shifting it is provided with a lens, wherein a distance between the lens end face and the filter is different than the distance between the lens end face and the input waveguide. By ensuring an appropriate difference in distance, optimum coupling is achieved even in view of the beam shift from the filter.

Abstract translation: 包括影响通过移动入射到其上的光束的滤光元件的光学装置设置有透镜，其中透镜端面与滤光器之间的距离不同于透镜端面与输入波导之间的距离。 通过确保距离的适当差异，即使考虑到过滤器的光束偏移，也能实现最佳耦合。

公开(公告)号：US6142678A

公开(公告)日：2000-11-07

申请号：US333018

申请日：1999-06-15

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B6/26 ,  G02B6/32 ,  G02B6/36

CPC classification number: G02B6/32 ,  G02B6/262 ,  G02B6/266 ,  G02B6/2746 ,  G02B6/327

Abstract: The present invention relates to an optical coupling between an end of an optical fiber and an end of a lens, which provides a reliable joint with a determined spacing and angular orientation. The optical coupling permits movement of the end of the optical fiber relative to the lens in at least two alignment directions. Advantageously, the present invention permits movement of the end of the optical fiber relative to the end of the lens in a direction perpendicular to the optical axis of the lens, before the optical coupling is secured. The optical fibre within an optical fiber tube/ferrule and the lens are secured within separate sleeves and the sleeves bonded together. The end of the optical fiber and the end of the lens are optically aligned before being secured in place relative to each other.

Abstract translation: 本发明涉及光纤的端部和透镜的端部之间的光耦合，其提供具有确定的间隔和角度取向的可靠接头。 光耦合允许在至少两个对准方向上相对于透镜移动光纤的端部。 有利地，本发明允许在光耦合被固定之前光纤的端部相对于透镜的端部在垂直于透镜的光轴的方向上移动。 光纤管/套管内的光纤和透镜被固定在分开的套筒内，并且套筒结合在一起。 在相对于彼此固定就位之前，光纤的端部和透镜的端部被光学对准。

公开(公告)号：US5825950A

公开(公告)日：1998-10-20

申请号：US647596

申请日：1996-05-13

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B6/26 ,  G02F1/09

CPC classification number: G02B6/2746 ,  G02F1/093 ,  Y10S372/703

Abstract: An optical isolator for passing light in a forward direction with greater intensity than reverse directed light, is provided. The device includes a conventional isolating means having at least two birefringent crystals, and a non-reciprocal rotating element disposed between the two crystals. The isolating means is disposed between two substantially collimating GRIN lenses, and a thermally expanded core (TEC) output optical fiber is coupled to one of the two lenses and an optical fiber having a thermally expanded core optically coupled to the other of the two collimating lenses. Unwanted reflected incident light is poorly coupled into the input TEC optical fiber due the angle of incidence at the fiber end.

Abstract translation: 提供了一种光学隔离器，用于以比反向指示的光更大的强度向前传播光。 该装置包括具有至少两个双折射晶体的常规隔离装置和设置在两个晶体之间的不可逆旋转元件。 隔离装置设置在两个基本上准直的GRIN透镜之间，并且热膨胀芯（TEC）输出光纤耦合到两个透镜中的一个透镜，并且具有光学耦合到两个准直透镜中的另一个的热膨胀芯的光纤 。 由于光纤端的入射角，不需要的反射入射光与输入TEC光纤耦合较差。

公开(公告)号：US5790314A

公开(公告)日：1998-08-04

申请号：US791325

申请日：1997-01-31

Applicant: Gary S. Duck ,  Yihao Cheng

Inventor： Gary S. Duck ,  Yihao Cheng

IPC: G02B5/28 ,  G02B3/00 ,  G02B6/293 ,  G02B6/34 ,  G02B6/32

CPC classification number: G02B6/2937 ,  G02B6/29389

Abstract: An optical device is disclosed wherein a first GRIN lens and a second GRIN lens having their optical axes offset. The first GRIN lens has one or more input ports at an input end. The second GRIN lens is disposed to receive light from the first GRIN lens. A reflecting surface is coated onto a second end face of the second GRIN lens or alternatively is disposed adjacent to the second end face and positioned to reflect an input beam of light launched into the input end face of the first GRIN lens. The reflective surface is at a location where light incident upon it to be returned to the first GRIN lens is collimated. By placing a filter and third GRIN lens between the first and second lenses double filtering may be achieved at the pass band or pass wavelength of the filter. Furthermore, the more simple arrangement including only first and second lenses provides a means of directing light into and out of the device at different angles or directions with respect to the optical axis of the first lens.

Abstract translation: 公开了一种光学装置，其中第一GRIN透镜和其光轴偏移的第二GRIN透镜。 第一个GRIN镜头在输入端有一个或多个输入端口。 第二GRIN透镜设置成接收来自第一GRIN透镜的光。 反射表面被涂覆到第二GRIN透镜的第二端面上，或者设置成与第二端面相邻并且被定位成反射投射到第一GRIN透镜的输入端面中的输入光束。 反射表面位于入射到其上的光返回到第一GRIN透镜的位置被准直。 通过在第一和第二透镜之间放置滤光器和第三GRIN透镜，可以在滤光器的通带或通过波长处实现双重滤光。 此外，仅包括第一透镜和第二透镜的更简单的布置提供了以相对于第一透镜的光轴不同的角度或方向将光引入和移出设备的装置。