公开(公告)号：US5701375A

公开(公告)日：1997-12-23

申请号：US626610

申请日：1996-04-02

Applicant: Gary S. Duck ,  Yihao Cheng ,  Koichi Abe

Inventor： Gary S. Duck ,  Yihao Cheng ,  Koichi Abe

IPC: G02B6/28 ,  G02B6/32 ,  G02B6/38

CPC classification number: G02B6/2817 ,  G02B6/32

Abstract: A system for automatically aligning optical components without active alignment techniques is provided. Optical components are placed into an alignment sleeve having an opening with a diameter sized to tightly receive optical components. Optical fibers having thermally expanded core ends are used to coupled light within the alignment sleeve. In instances where the optical fibers are offset from the longitudinal axis of the sleeve, means are provided to prevent rotation of an optical fiber tube holding the optical fibers.

Abstract translation: 提供了一种用于自动对准光学部件而没有主动对准技术的系统。 将光学部件放置在具有开口的对准套筒中，该开口具有尺寸适于紧密接收光学部件的直径。 使用具有热膨胀的芯端的光纤用于将对准套筒内的光耦合。 在光纤从套筒的纵向轴线偏移的情况下，提供了用于防止保持光纤的光纤管的旋转的装置。

公开(公告)号：US5588078A

公开(公告)日：1996-12-24

申请号：US513028

申请日：1995-08-09

Applicant: Yihao Cheng ,  Gary S. Duck

Inventor： Yihao Cheng ,  Gary S. Duck

IPC: G02B6/26 ,  G02F1/09

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

Abstract: A non-reciprocal optical device for interconnecting single mode optical fiber waveguides so that a light beam can pass between the fibers in a forward direction but a reverse beam, such as might be caused by unwanted reflections, is displaced away the input fiber, includes a focussing lens unit and at least one non-reciprocal optical element in series between respective ends of an input optical fiber and an output optical fiber. The focussing lens unit has a focal length such that a light beam from the input optical fiber will be focussed onto the end of the output optical fiber. The focussing lens unit may comprise, for example, a half-pitch grin-rod lens. The non-reciprocal device is positioned adjacent one or other of the foci of the focussing lens unit. The focussing lens unit may comprise several lens elements, for example a pair of quarter pitch collimating lenses, allowing additional optical elements, such as filters, to be interposed. An isolator/wavelength division multiplexing hybrid device is formed by interposing a wavelength-division multiplexing filter and arranging the geometry so that different wavelength light beams are coupled to different output fibers. High isolation and low insertion loss are achieved in a compact device because the non-reciprocal device is placed where the width of the light beams is small.

Abstract translation: 用于互连单模光纤波导的不可逆的光学装置，使得光束可以在向前方向上的光纤之间穿过，但是可能由不想要的反射引起的反向光束被偏移离开输入光纤，包括 聚焦透镜单元和至少一个不可逆的光学元件串联在输入光纤和输出光纤的各个端之间。 聚焦透镜单元具有焦距，使得来自输入光纤的光束将被聚焦到输出光纤的端部上。 聚焦透镜单元可以包括例如半间距微光杆透镜。 不可逆装置位于聚焦透镜单元的一个或另一个焦点附近。 聚焦透镜单元可以包括多个透镜元件，例如一对四分之一间距准直透镜，允许插入诸如滤光器的附加光学元件。 隔离器/波分复用混合器件通过插入波分多路复用滤波器并布置几何结构形成，使得不同波长的光束耦合到不同的输出光纤。 在紧凑的装置中实现了高隔离度和低插入损耗，因为不可逆装置被放置在光束宽度小的地方。

公开(公告)号：US06607313B1

公开(公告)日：2003-08-19

申请号：US09342154

申请日：1999-06-23

Applicant: Mark Farries ,  Yihao Cheng

Inventor： Mark Farries ,  Yihao Cheng

IPC: H04J1408

CPC classification number: G02B6/2861 ,  H04J14/06 ,  H04J14/08

Abstract: A micro-optical delay element for a polarization time-division multiplexing scheme is disclosed wherein two light beams are provided to a polarization beam splitter/combiner (PBS/C) in the absence of optical fiber. At least one beam exiting a modulator is collimated and reaches the (PBS/C) unguided as a substantially collimated beam. In this manner the polarization state of the beam is substantially unchanged. This obviates a requirement for polarization controllers.

Abstract translation: 公开了一种用于偏振时分复用方案的微光延迟元件，其中在没有光纤的情况下将两个光束提供给偏振分束器/组合器（PBS / C）。 离开调制器的至少一个光束被准直，并且到达（PBS / C）无视为基本上准直的光束。 以这种方式，光束的偏振状态基本上不变。 这消除了偏振控制器的要求。

公开(公告)号：US06529328B1

公开(公告)日：2003-03-04

申请号：US09363824

申请日：1999-07-30

Applicant: Yihao Cheng ,  Donald R. Zimmerman

Inventor： Yihao Cheng ,  Donald R. Zimmerman

IPC: G02B2700

CPC classification number: H04B10/2912 ,  G02B5/284 ,  G02B6/29364 ,  G02B6/2937 ,  G02B6/29391 ,  G02B6/29395 ,  H01S3/10023 ,  H01S3/1608 ,  H01S2301/04 ,  H01S2301/06 ,  H04B10/2941

Abstract: This invention relates to invention relates to a variable slope optical filter in the form of a Fabry-Perôt etalon having an end face with a variable finesse. A method for filtering and a variable slope optical filter for in-line use with an optical amplifier signal is also disclosed. The filter has a wavelength response that is substantially linear in slope within a band of operation wavelengths of the amplifier; the slope of the filter in an operating band of wavelengths is between zero and a only one of a positive or negative number; furthermore the filter has an amplitude response that has an opposite and counter slope as a function of wavelength to that of a gain tilt of the amplifier within the operation band of wavelengths. Relative movement between the filter and the optical amplifier signal is provided to vary the slope of the filter by means of varying the amplitude wavelength response of the filter.

Abstract translation: 本发明涉及一种法布里 - 珀罗标准具形式的可变斜率光学滤波器，其具有可变的精细度的端面。 还公开了一种用于滤波的方法和用于与光放大器信号串联使用的可变斜率滤光器。 滤波器具有波长响应，其在放大器的工作波长范围内的斜率基本上是线性的; 波长工作频带中的滤波器的斜率在零和仅为正数或负数之间; 此外，滤波器具有幅度响应，其具有与波长的操作频带内的放大器的增益倾斜的波长相对的和相反的斜率。 提供滤波器和光放大器信号之间的相对运动，以通过改变滤波器的振幅波长响应来改变滤波器的斜率。

公开(公告)号：US06449091B1

公开(公告)日：2002-09-10

申请号：US08754032

申请日：1996-12-03

Applicant: Yihao Cheng ,  Neil Teitelbaum

Inventor： Yihao Cheng ,  Neil Teitelbaum

IPC: G02B530

CPC classification number: G02F1/093 ,  Y10S359/90 ,  Y10S372/703

Abstract: Tuning to maximize the isolation provided by an optical isolator to one of a predetermined plurality of wavelengths is achieved by tilting the isolator with respect to an input beam of light. Further tuning to a peak response for a given wavelength is achieved by rotation of the isolator about its longitudinal axis while or after tilting. In the manufacture of the isolator a test beam is launched into an output port end directed toward the input end. Tilting, or tiling and rotating is initiated and light at the input end is measured while tilting/rotating. When the position is determined where the minimal amount of light is measured, the optical elements are glued or secured in place, thereby providing a way to alter the response of an isolator for a given wavelength of input light.

Abstract translation: 通过使隔离器相对于输入光束倾斜来实现将由光隔离器提供的隔离度最大化为预定多个波长中的一个的调谐。 通过在倾斜期间或之后围绕其纵向轴线旋转隔离器来实现对于给定波长的进一步调谐到峰值响应。 在隔离器的制造中，测试光束被发射到指向输入端的输出端口端。 开始倾斜或平铺和旋转，并在倾斜/旋转时测量输入端的光。 当确定测量最小光量的位置时，将光学元件胶合或固定就位，从而提供改变隔离器对于给定波长的输入光的响应的方式。

公开(公告)号：US06268954B1

公开(公告)日：2001-07-31

申请号：US09377692

申请日：1999-08-20

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: H01S300

CPC classification number: G02B6/2746 ,  G02B6/2937 ,  G02F1/0136 ,  G02F1/09 ,  G02F1/093 ,  G02F2203/055 ,  H01S3/06754 ,  H01S3/10023 ,  H01S2301/04

Abstract: This invention relates to a method for filtering and to a variable slope optical filter for in-line use with an optical amplifier signal. The filter has a wavelength response that is substantially linear in slope within a band of operation wavelengths of the amplifier; the slope of the filter in an operating band of wavelengths is between zero and only one of a positive or negative number; furthermore the filter has an amplitude response that has an opposite and counter slope as a function of wavelength to that of a gain tilt of the amplifier within the operation band of wavelengths. The filter having means of operating on polarized light such that different wavelengths within a band of wavelengths within the operation band are subject to different levels of attenuation according to their polarization state. A wave plate having a predetermined thickness provides a relative polarization difference between two wavelengths of an incoming beam in a controlled manner. A polarizer receives light from the wave plate and only allows a predetermined polarization of light to pass therethrough unattenuated and variably attenuates or substantially prevents and/or attenuates other predetermined polarizations of light to pass therethrough.

Abstract translation: 本发明涉及一种用于滤波的方法和一种用于与光放大器信号一起使用的可变斜率滤光器。 滤波器具有波长响应，其在放大器的工作波长范围内的斜率基本上是线性的; 波长工作频带中的滤波器的斜率在零和只有正数或负数之一; 此外，滤波器具有幅度响应，其具有与波长的操作频带内的放大器的增益倾斜的波长相对的和相反的斜率。 滤光器具有对偏振光进行操作的装置，使得在工作频带内的波长带内的不同波长根据其偏振态受到不同的衰减水平。 具有预定厚度的波片以受控的方式提供入射光束的两个波长之间的相对偏振差。 偏振器接收来自波片的光，并且仅允许预定的偏振光通过其通过，并且可变地衰减或基本上防止和/或衰减光的其它预定极化从而通过。

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：US6014256A

公开(公告)日：2000-01-11

申请号：US45946

申请日：1998-03-23

Applicant: Yihao Cheng

Inventor： Yihao Cheng

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

CPC classification number: G02B6/272 ,  G02B27/283 ,  G02B6/266 ,  G02B6/2746 ,  G02B6/2773 ,  G02B6/2848 ,  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：US6014254A

公开(公告)日：2000-01-11

申请号：US803827

申请日：1997-02-24

Applicant: Yihao Cheng

Inventor： Yihao Cheng

IPC: G02B6/28 ,  G02B6/26 ,  G02B6/34 ,  G02B27/28 ,  G02F1/09 ,  G02B5/30 ,  G02B6/32

CPC classification number: G02B6/272 ,  G02B27/283 ,  G02B6/2773 ,  G02B6/2746 ,  G02F1/093

Abstract: An optical fiber having a small numerical aperture (NA) is optically coupled with a short birefringent crystal to provide a polarization beam splitter. This arrangement obviates the use of a GRIN lens coupled between an input optical fiber and the birefringent crystal and provides significant cost savings by allowing a short crystal to be used. In this invention, the birefringent crystal has a beam-shifting angle that is larger than the numerical aperture at the output end of the optical fiber.

Abstract translation: 具有小数值孔径（NA）的光纤与短双折射晶体光学耦合以提供偏振分束器。 这种布置避免了使用耦合在输入光纤和双折射晶体之间的GRIN透镜，并且通过允许使用短晶体来显着降低成本。 在本发明中，双折射晶体具有大于光纤输出端的数值孔径的光束移动角度。

公开(公告)号：US5850493A

公开(公告)日：1998-12-15

申请号：US896540

申请日：1997-07-18

Applicant: Yihao Cheng

Inventor： Yihao Cheng

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

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

Abstract: An optical device comprising an optical element optically coupled with at least two lenses, each lens having at least a substantially collimating end, the at least substantially collimating ends being inwardly facing one another and each lens having a substantially focusing end, the substantially focusing ends being outwardly facing, and at least one waveguide disposed adjacent and spaced from the each outwardly facing end for coupling light to or from an adjacent lens, the waveguides each having an end that is separated from its adjacent lens by an optical distance of approximately d1, an optical distance between the two collimating end faces of the at least two lenses being d2, where d1 is approximately equal to one half d2.

Abstract translation: 一种光学装置，包括与至少两个透镜光学耦合的光学元件，每个透镜具有至少基本上准直的端部，所述至少基本上准直的端部彼此面对，并且每个透镜具有基本上聚焦的端部， 并且至少一个波导设置成与每个面向外的端部相邻并间隔开，用于将光耦合到相邻透镜或从相邻透镜耦合光，每个波导具有与其相邻透镜分开大约d1的光学距离的端部， 至少两个透镜的两个准直端面之间的光学距离为d2，其中d1近似等于一半d2。