公开(公告)号：US5920411A

公开(公告)日：1999-07-06

申请号：US801118

申请日：1997-02-14

申请人： Gary S. Duck ,  Yihao Cheng

发明人： Gary S. Duck ,  Yihao Cheng

IPC分类号： G02B6/34 ,  H04J14/02

CPC分类号： G02B6/29364 ,  G02B6/29367 ,  G02B6/2938

摘要： An optical multiplexing/demultiplexing device has a plurality of optical ports along a cascading optical path with wavelength-specific filters disposed at the ports. The filters are selected to form groups of at least two virtually identical filters. At least one "add" connection is provided for admitting a selected band into the optical path, the connection being disposed at a second or consecutive (third, fourth etc . . . ) filter of the same wavelength as the band being added. The device uses a single medium for processing optical signals, e.g. a single polygonal optical block or air.

摘要翻译： 光复用/解复用装置具有沿着级联光路的多个光端口，其中波长特定滤波器设置在端口处。 选择过滤器以形成至少两个实际上相同的过滤器的组。 提供至少一个“添加”连接用于将所选择的频带接纳到光路中，该连接被布置在与所添加的频带相同的波长的第二或连续（第三，第四等等）滤波器处。 该装置使用单个介质来处理光信号，例如。 单个多边形光学块或空气。

公开(公告)号：US5878176A

公开(公告)日：1999-03-02

申请号：US917102

申请日：1997-08-25

申请人： Yihao Cheng

发明人： Yihao Cheng

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

CPC分类号： G02B6/2746 ,  G02B27/283 ,  G02F1/093

摘要： 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.

摘要翻译： 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：US5754718A

公开(公告)日：1998-05-19

申请号：US701796

申请日：1996-08-26

申请人： Gary S. Duck ,  Yihao Cheng ,  Mark Farries

发明人： Gary S. Duck ,  Yihao Cheng ,  Mark Farries

IPC分类号： G02B6/34 ,  G02B6/32

CPC分类号： G02B6/2932 ,  G02B6/2937 ,  G02B6/2938 ,  G02B6/29395 ,  G02B6/29398

摘要： A hybrid filter includes a dichroic interference WDM filter closely coupled with a Bragg grating. Preferably the Bragg grating is housed within a sleeve having an end face that is directly coupled with an end face lens of the WDM interference filter. The entire filter can be placed within a single housing and temperature controlled. Etalon effects are lessened by placing the Bragg grating as close as possible to the WDM filter. Multiple hybrid filters of this type optically coupled to an optical circulator provided multi-channel demultiplexing.

摘要翻译： 混合滤波器包括与布拉格光栅紧密耦合的二向干涉WDM滤波器。 优选地，布拉格光栅容纳在具有与WDM干涉滤光器的端面透镜直接耦合的端面的套筒内。 整个过滤器可以放置在单个壳体内并进行温度控制。 通过将布拉格光栅尽可能靠近WDM滤光片来减少Etalon效应。 这种类型的光耦合到光循环器的多重混合滤波器提供多通道解复用。

公开(公告)号：US5680237A

公开(公告)日：1997-10-21

申请号：US558537

申请日：1995-11-16

申请人： Yihao Cheng

发明人： Yihao Cheng

IPC分类号： G02B6/26 ,  G02B6/34 ,  H04J14/02

CPC分类号： G02B6/2937 ,  G02B6/2746

摘要： A lensing system is provided for coupling light from one optical fiber to another through a plurality of graded index (GRIN) lenses. The system is capable of coupling light of two significantly different wavelengths in a relatively efficient manner. More specifically, a first GRIN lens having at least two ports on an outwardly facing end face is provided for coupling light of one of the wavelenghts from one of the at least two ports to another of the at least two ports. A second GRIN lens typically being about one half pitch, having an end face juxtaposed to an end face of the first GRIN lens, is provided for, in combination with the first lens, adjusting for differences in the two significantly different wavelengths, so that light will efficiently be coupled between a third graded index lens and the first graded index lens that are of different lengths to accommodate for the different wavelengths of light. The third GRIN lens has an inwardly facing end face spaced apart from an inwardly facing end face of the second GRIN lens, and includes a port on an outwardly facing end face that is optically aligned with one of the ports on the first GRIN lens. The first lens GRIN lens and the second GRIN lens in combination collimate or focus light that is traversing a gap between the inwardly facing end face of the second GRIN lens to the inwardly facing end face of the third GRIN lens.

摘要翻译： 提供透镜系统，用于通过多个渐变折射率（GRIN）透镜将来自一个光纤的光耦合到另一个光纤。 该系统能够以相对有效的方式耦合两种显着不同波长的光。 更具体地说，提供了一种在面向外的端面上具有至少两个端口的第一GRIN透镜，用于将至少两个端口中的一个的所述波长中的一个的光耦合到所述至少两个端口中的另一个。 通常具有约半个间距的第二GRIN透镜，其具有与第一GRIN透镜的端面并置的端面，与第一透镜组合，用于调节两个明显不同的波长的差异，使得光 将有效地耦合在具有不同长度的第三渐变折射率透镜和第一渐变折射率透镜之间以适应不同波长的光。 第三GRIN透镜具有与第二GRIN透镜的面向内的端面间隔开的向内的端面，并且包括与第一GRIN透镜上的端口中的一个光学对准的朝外端面上的端口。 第一透镜GRIN透镜和第二GRIN透镜组合准直或聚焦光，其穿过第二GRIN透镜的面向内的端面与第三GRIN透镜的向内的端面之间的间隙。

公开(公告)号：US5657155A

公开(公告)日：1997-08-12

申请号：US698648

申请日：1996-08-16

申请人： Yihao Cheng

发明人： Yihao Cheng

IPC分类号： G02B6/28 ,  G02B6/34 ,  H01S3/094 ,  H01S3/00 ,  G02B27/10

CPC分类号： G02B6/29311 ,  G02B6/2848 ,  H01S3/094003

摘要： An optical tap/coupler consists essentially of a two graded index lenses having a holographic beam splitter (HBS) in between. The HBS independent of polarization state and wavelength of an input light beam splits an incoming beam into at least two beams. The two beams are directed to two separate locations or ports at an end face of one of the graded index lenses thereby providing a main beam and a tap beam at an output of the device. The device is compact and can accommodate other optical components between the two graded index lenses.

摘要翻译： 光学分接头/耦合器基本上由两个分级折射率透镜组成，其间具有全息分束器（HBS）。 独立于输入光束的偏振状态和波长的HBS将入射光束分成至少两个光束。 两个光束被引导到一个渐变折射率透镜的端面处的两个分开的位置或端口，从而在装置的输出处提供主光束和光束。 该设备紧凑，可容纳两个渐变折射率镜片之间的其他光学部件。

公开(公告)号：US5594821A

公开(公告)日：1997-01-14

申请号：US442361

申请日：1995-05-16

申请人： Yihao Cheng

发明人： Yihao Cheng

IPC分类号： G02B6/26 ,  G02B6/34 ,  G02B6/28

CPC分类号： G02B6/2937 ,  G02B6/2746

摘要： An integrated optical isolator arrangement is described that is capable of isolating an input optical signal and coupling a pump signal. The coupler includes a pair of lenses with an isolator disposed therebetween. The isolator is sandwiched between a splitter/filter and a wavelength selective device. An end face of each lens has an input and an output port for receiving and transmitting optical signals. The splitter/filter is selected to transmit some of the input signal on a first input port and to reflect the remaining untransmitted portion of the input optical signal to a first output port proximate to the first input port. The wavelength selective device allows the input signal from the first input port to pass through it to a second output port, and in addition, reflects a pump signal transmitted on the second input port to the second output port for combination with the input optical signal.

摘要翻译： 描述了能够隔离输入光信号并耦合泵浦信号的集成光隔离器装置。 耦合器包括一对透镜，其间设置有隔离器。 隔离器夹在分离器/滤波器和波长选择装置之间。 每个透镜的端面具有用于接收和发送光信号的输入端口和输出端口。 选择分路器/滤波器以在第一输入端口上传送一些输入信号，并将输入光信号的剩余未发射部分反射到靠近第一输入端口的第一输出端口。 波长选择装置允许来自第一输入端口的输入信号通过它到第二输出端口，此外，将在第二输入端口上传输的泵浦信号反映到第二输出端口以与输入光信号组合。

公开(公告)号：US5481402A

公开(公告)日：1996-01-02

申请号：US199793

申请日：1994-02-22

申请人： Yihao Cheng ,  Timothy P. Cutts ,  Gary S. Duck ,  Carey M. Garrett

发明人： Yihao Cheng ,  Timothy P. Cutts ,  Gary S. Duck ,  Carey M. Garrett

IPC分类号： G02B5/28 ,  G02B5/30 ,  G02B6/26 ,  G02B6/34 ,  G02B7/00 ,  G02F1/21

CPC分类号： G02B5/285 ,  G02B26/007 ,  G02B5/30 ,  G02B6/2706 ,  G02B6/29361 ,  G02B6/29395 ,  G02B6/2746 ,  G02B6/2793

摘要： An tunable optical filter of the kind used, for example, in wavelength-division multiplexing (WDM) optical communication systems and tunable source applications, has an interference filter element which is pivotable to adjust the operating wavelength of the filter. In order to reduce polarization dependency as the angle of the interference filter element changes, the light beam to be filtered is passed through the filter element twice, the second time with its polarization state shifted, specifically orthogonal, relative to the polarization state during the first pass. As a result, polarization dependent effects are equalized. The optical filter comprises a pivotally mounted filter element, an input optical fiber for directing a light beam to be filtered through the filter element in a first direction with a first polarization state, optical elements for rotating the polarization state of the filtered light beam and returning the light beam through the filter element (10) a second time, and an output optical fiber for receiving the light beam following passage of the light beam though the filter element the second time. The optical elements may comprise a reflector for reflecting a light beam emerging from the optical filter element to return through the optical filter element in the opposite direction, and a polarization rotator, such as a quarter-wave plate or a Faraday rotator, for rotating the polarization state of the light beam through 90 degrees before passage in the opposite direction.

摘要翻译： 例如在波分多路复用（WDM）光通信系统和可调源应用中使用的类型的可调光滤波器具有可以枢转的调谐滤波器的工作波长的干涉滤光元件。 为了在干涉滤光元件的角度变化时减小偏振依赖性，要滤波的光束通过滤光元件两次，其第二次偏振态相对于第一次的偏振态偏移，具体地是正交的 通过。 结果，使偏振相关效应相等。 光学滤波器包括枢轴安装的滤波器元件，用于沿第一极化状态的第一方向引导要滤波通过滤光元件的光束的输入光纤，用于旋转滤光片的偏振状态的光学元件并返回 第二次通过滤光元件（10）的光束;以及输出光纤，用于在第二次通过滤光元件之后接收通过光束的光束。 光学元件可以包括反射器，用于反射从光学滤光器元件出射的光束，以沿相反方向返回穿过滤光器元件，以及偏振旋转器，例如四分之一波片或法拉第旋转器，用于旋转 在相反方向通过之前，光束的极化状态通过90度。