公开(公告)号：US06381049B1

公开(公告)日：2002-04-30

申请号：US08990421

申请日：1997-12-15

申请人： David J. Xu ,  Sami T. Hendow

发明人： David J. Xu ,  Sami T. Hendow

IPC分类号： H04B1000

CPC分类号： G02B6/29364 ,  G02B6/266 ,  G02B6/2938 ,  H04B10/2971

摘要： A four-port Wavelength-Division-Multiplexing (WDM) element is disclosed that can be employed for various purposes in optical communication networks, particularly in bi-directional fiber optic lines. In one embodiment, one four-port WDM element is used with one optical amplifier to provide bi-directional propagation on the same fiber. In another embodiment, the four-port element is used in conjunction with optical attenuators to provide for gain equalization of channels and the flexibility to add or remove channels. In yet another embodiment, input and output ports are added to current-art elements thereby enabling bi-directional operation to be achieved with equipment that does not provide such capabilities.

摘要翻译： 公开了四端口波分复用（WDM）元件，其可以用于光通信网络中的各种目的，特别是在双向光纤线路中。 在一个实施例中，一个四端口WDM元件与一个光放大器一起使用以在同一光纤上提供双向传播。 在另一个实施例中，四端口元件与光衰减器一起使用以提供通道的增益均衡以及添加或去除通道的灵活性。 在另一个实施例中，输入和输出端口被添加到当前艺术元件，从而使得能够利用不提供这种能力的设备实现双向操作。

公开(公告)号：US5418641A

公开(公告)日：1995-05-23

申请号：US140436

申请日：1993-10-25

申请人： Sami T. Hendow ,  Thomas J. Kujawa

发明人： Sami T. Hendow ,  Thomas J. Kujawa

IPC分类号： H01S3/08 ,  G01B9/02

CPC分类号： H01S3/08

摘要： Resonant cavity apparatus comprise a Fabry-Perot optical resonant cavity of a type having families of transverse modes between longitudinal TEM.sub.00 modes. In such resonant cavity apparatus and in methods of minimizing the effect of transverse modes, families of such transverse modes are merged into longitudinal TEM.sub.00 modes of the non-confocal Fabry-Perot optical resonant cavity, providing superior optical performance. This may be manifested by a transmission spectrum similar to that of a flat-flat Fabry-Perot cavity, but with superior Finesse and transmission efficiency.

摘要翻译： 谐振腔装置包括在纵向TEM00模式之间具有横向模式族的法布里 - 珀罗光学谐振腔。 在这种谐振腔装置和使横向模式的影响最小化的方法中，这种横向模式的族被合并成非共焦法布里 - 珀罗光学谐振腔的纵向TEM00模式，提供优异的光学性能。 这可以通过与平坦的法布里 - 珀罗腔相似的透射光谱来表现，但具有优异的精细度和透射效率。

公开(公告)号：US07130113B2

公开(公告)日：2006-10-31

申请号：US11015671

申请日：2004-12-20

申请人： Sami A. Shakir ,  Sami T. Hendow ,  William Robert Culver ,  Burke E. Nelson

发明人： Sami A. Shakir ,  Sami T. Hendow ,  William Robert Culver ,  Burke E. Nelson

IPC分类号： H04B10/12 ,  H01S4/00

CPC分类号： H01S3/2383 ,  G02B6/2817 ,  G02B27/108 ,  G02B27/144 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/10092 ,  H01S3/1302 ,  H01S3/1307

摘要： A method passively locks and phases an array of fiber amplifiers in a fiber amplifier system that emits a beam, such as a laser beam. The method locks the fiber amplifiers so that the fiber amplifiers operate at same or similar frequencies. The method samples a small portion of the emitted beam in a far-field around a central lobe on an optical axis and then couples this portion of emitted beam back into the array of fiber amplifiers. The fiber amplifiers may be phased so that the emitted beam concentrates its energy around the central lobe in the far-field. Phasing may be achieved by using an aperture, for example, to restrict the portion of the emitted beam to be coupled back to a restricted region around the optical axis.

公开(公告)号：US4825260A

公开(公告)日：1989-04-25

申请号：US17429

申请日：1987-02-20

申请人： Sami T. Hendow ,  Graham J. Martin ,  Sheridan W. Hammons

发明人： Sami T. Hendow ,  Graham J. Martin ,  Sheridan W. Hammons

IPC分类号： G01C19/66 ,  G01C19/64

CPC分类号： G01C19/665

摘要： An apparatus and method for path length control for a laser gyro using two external gain cells and the shifted gain spectra of two neon isotopes. The laser cavity is stabilized by detecting the difference in the amplification rate between the two gain cells that are traversed by two rays. Absorption cells may be used to replace the gain cells.

摘要翻译： 一种用于使用两个外部增益单元的激光陀螺仪的路径长度控制的装置和方法以及两个氖同位素的偏移增益谱。 通过检测由两条光线穿过的两个增益单元之间的放大率的差异来稳定激光腔。 可以使用吸收单元来代替增益单元。

公开(公告)号：US07006765B2

公开(公告)日：2006-02-28

申请号：US10967483

申请日：2004-10-18

申请人： Sami T. Hendow

发明人： Sami T. Hendow

IPC分类号： H04J14/02

CPC分类号： H04J14/02 ,  G01J3/36 ,  H04B10/077 ,  H04B10/07955 ,  H04J14/0201 ,  H04J14/0221 ,  H04Q11/0062 ,  H04Q2011/0049 ,  H04Q2011/0083

摘要： An optical network monitor and a method for monitoring the optical signals of an optical network including a spectrograph that includes a detector array, a processor and outputs. The network monitor receives an optical input signal which includes individual channels. The optical signal is transmitted onto the spectrograph which disperses the optical signal into the individual channels. The individual channels are directed onto the detector array so that the channels are spaced across the detector array. The detector array detects the channels in parallel and transmits to the processor channel parameter data which is processes the parameter data through internal algorithms to produce the outputs.

摘要翻译： 一种光网络监视器和用于监视光网络的光信号的方法，包括包括检测器阵列，处理器和输出的光谱仪。 网络监视器接收包括各个信道的光输入信号。 光信号被传输到将光信号分散到各个信道中的光谱仪上。 各个通道被引导到检测器阵列上，使得通道间隔开检测器阵列。 检测器阵列并行地检测通道，并将处理器通道参数数据传送到处理器参数数据，该数据通过内部算法处理参数数据以产生输出。

公开(公告)号：US5887091A

公开(公告)日：1999-03-23

申请号：US896930

申请日：1997-07-18

申请人： Salim N. Jabr ,  Gennady I. Farber ,  Edward A. Vetter ,  Sami T. Hendow

发明人： Salim N. Jabr ,  Gennady I. Farber ,  Edward A. Vetter ,  Sami T. Hendow

IPC分类号： H01S3/067 ,  H04B10/17 ,  G02N6/28

CPC分类号： H04B10/2941 ,  H01S3/067 ,  H04B10/2972 ,  H01S3/0675 ,  H01S3/06787

摘要： A bidirectionally amplifying rare earth doped fiber optical amplifier having an equalized gain at multiple wavelengths is disclosed for use in dense wavelength multiplexed bidirectional fiber transmission applications. In a first embodiment, a four port circulator is utilized with two amplifying fibers; one for each direction of propagation and a multiplicity of gratings configured to equalize the gain at the different wavelengths. Different embodiments utilizing three port and four port circulators are utilized. A more general amplifier device with equal gain at multiple wavelengths is disclosed.

摘要翻译： 公开了在多波长多路复用双向光纤传输应用中使用均衡增益的双向放大稀土掺杂光纤放大器。 在第一实施例中，四端口循环器与两个放大光纤一起使用; 一个用于每个传播方向，以及多个光栅被配置成均衡在不同波长的增益。 利用利用三端口和四端口循环器的不同实施例。 公开了一种在多个波长处具有相等增益的更一般的放大器装置。

公开(公告)号：US5163114A

公开(公告)日：1992-11-10

申请号：US653906

申请日：1991-02-12

申请人： Sami T. Hendow

发明人： Sami T. Hendow

IPC分类号： G02B6/32 ,  G02B6/34 ,  G02B6/42

CPC分类号： G02B6/29358 ,  G02B6/32 ,  G02B6/4226 ,  G02B6/4296

摘要： Methods and apparatus for mode coupling a light beam into an optical cavity provide an input fiber pigtail with a fiber endface at one end of that input fiber pigtail. A cavity input aperture adapter is made integral with that input fiber pigtail at an opposite end of that input fiber pigtail for attachment to the housing of the optical cavity at its light input aperture. The input fiber pigtail is provided with a fiber input coupler integral with that input fiber pigtail at the above mentioned one end of the input fiber pigtail. That fiber input coupler has an integrated lens for focusing the light beam onto the fiber endface. The cavity input aperture adapter has a lens assembly for directing light from the above mentioned opposite end of the fiber pigtail into the input aperture of the optical cavity. Either the fiber input coupler or the cavity input aperture adapter may be omitted in different embodiments.

摘要翻译： 用于将光束模式耦合到光腔中的方法和装置为输入光纤尾纤的一端提供具有光纤端面的输入光纤尾纤。 空腔输入孔适配器与该输入光纤引出线的相对端与该输入光纤引线一体形成，以在其光输入孔处附着到光腔的壳体。 输入光纤尾纤在输入光纤尾纤的上述一端设置有与该输入光纤尾纤一体的光纤输入耦合器。 该光纤输入耦合器具有用于将光束聚焦到光纤端面上的集成透镜。 空腔输入孔适配器具有用于将来自纤维尾纤的上述相对端的光引导到光腔的输入孔中的透镜组件。 在不同的实施例中，可以省略光纤输入耦合器或空腔输入孔适配器。

公开(公告)号：US4836675A

公开(公告)日：1989-06-06

申请号：US67254

申请日：1987-06-29

申请人： Sami T. Hendow ,  Graham J. Martin

发明人： Sami T. Hendow ,  Graham J. Martin

IPC分类号： H01S3/083 ,  G01C19/66

CPC分类号： G01C19/667

摘要： A multioscillator ring laser gyroscope includes a frame that encloses a closed optical path in which four circularly polarized optical waves propagate. A combining optics system combining the waves to produce an interference pattern. A pair of photodetectors are placed in the interference pattern in half quadrature with respect to the interference pattern so that the detectors produce oscillatory output signals that are in quadrature with respect to each other. Signals indicative of the beat signal in the interference pattern are processed to determine the rotation rate, the direction of rotation and to provide a cavity length control signal.

摘要翻译： 多振荡器环形激光陀螺仪包括围绕四个圆偏振光波传播的封闭光路的框架。 组合光学系统以组合波形以产生干涉图案。 相对于干涉图案，一对光电检测器以干涉图案被放置成半正交，使得检测器产生相对于彼此正交的振荡输出信号。 处理表示干涉图案中的拍频信号的信号，以确定旋转速度，旋转方向，并提供空腔长度控制信号。