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    Reducing crosstalk in optical wavelength converters
    1.
    发明授权
    Reducing crosstalk in optical wavelength converters 有权
    减少光波长转换器中的串扰

    公开(公告)号：US09054807B2

    公开(公告)日：2015-06-09

    申请号：US11138007

    申请日：2005-05-26

    Applicant: Aref Chowdhury ,  Gregory Raybon

    Inventor： Aref Chowdhury ,  Gregory Raybon

    IPC: H04B10/2513

    CPC classification number: H04B10/2513

    Abstract: An optical fiber transmission system includes a series of optical fiber transmission spans and one or more all-optical signal processors. The optical fiber transmission spans are connected to form an optical communication path. Each all-optical signal processor directly connects a corresponding adjacent pair of the spans. Each all-optical signal processor includes an optical wavelength converter having input and output ports and a dispersion adjustment module connected to the input port of the optical wavelength converter of the same processor. The dispersion module is also configured to adjust cumulative dispersions of some received optical pulses to be outside of a range for the cumulative dispersions of corresponding optical pulses in the span directly preceding the same processor.

    Abstract translation: 光纤传输系统包括一系列光纤传输跨度和一个或多个全光信号处理器。 光纤传输跨接连接形成光通信路径。 每个全光信号处理器直接连接相应的相邻的一对跨距。 每个全光信号处理器包括具有输入和输出端口的光波长转换器和连接到同一处理器的光波长转换器的输入端口的色散调节模块。 分散模块还被配置为将一些接收到的光脉冲的累积色散调整在与直接在同一处理器之前的范围内的对应光脉冲的累积色散的范围之外。

    Optical Wavelength-Selective Switch With A Bank Of Wavelength Convertors
    2.
    发明申请
    Optical Wavelength-Selective Switch With A Bank Of Wavelength Convertors 有权
    具有波长转换器组的光波长选择开关

    公开(公告)号：US20140177658A1

    公开(公告)日：2014-06-26

    申请号：US13726382

    申请日：2012-12-24

    Applicant: Aref Chowdhury ,  Dominick Scordo

    Inventor： Aref Chowdhury ,  Dominick Scordo

    IPC: H04Q11/00

    CPC classification number: H04Q11/0005 ,  H04J14/0212 ,  H04Q2011/0011 ,  H04Q2011/0016 ,  H04Q2011/003 ,  H04Q2011/0058

    Abstract: An apparatus includes a wavelength-selective optical switch able to route light between a first optical port and a plurality of second optical ports. The wavelength-selective optical switch includes a bank of optical wavelength-converters. Each wavelength converter of the bank is able to selectively optically couple an optical data stream on a wavelength-channel between the first optical port and individual ones of the second optical ports.

    Abstract translation: 一种装置包括能够在第一光学端口和多个第二光学端口之间路由光的波长选择性光学开关。 波长选择光开关包括一组光波长转换器。 银行的每个波长转换器能够选择性地光耦合在第一光学端口和第一光学端口上的波长通道之间的波长信道上的光学数据流。

    LOW TOTAL EXCURSION DISPERSION MAPS
    5.
    发明申请
    LOW TOTAL EXCURSION DISPERSION MAPS 失效
    低总挥发分散度

    公开(公告)号：US20070286607A1

    公开(公告)日：2007-12-13

    申请号：US11844940

    申请日：2007-08-24

    Applicant: Aref Chowdhury ,  Rene'-Jean Essiambre ,  Lisa Wickham

    Inventor： Aref Chowdhury ,  Rene'-Jean Essiambre ,  Lisa Wickham

    IPC: H04B10/18

    CPC classification number: H04B10/25253

    Abstract: A process optically transports digital data over an all-optical long-haul communication path. The process includes transporting digital optical data signals at a selected bit rate and a selected wavelength over a sequence of transmission spans. The sequence includes 70 percent or more of the spans of the long-haul all-optical communication path. Each span of the sequence has a primary local maximum optical power point for the wavelength on a transmission fiber and nearest to an input of the span. The transporting causes a cumulative dispersion of each signal to evolve such that residual dispersions per span are positive over some of the spans and are negative over other of the spans. At the primary local maximum power points, magnitudes of cumulative dispersions of the signals in pico seconds per nanometer remain at less than 32,000 times the inverse of the bit rate in giga bits per second.

    Abstract translation: 一种过程通过全光学长途通信路径光学传输数字数据。 该过程包括以选定的比特率传送数字光学数据信号，并在一系列传输跨度上传输选定的波长。 该序列包括长距离全光通信路径的70％或更多的跨度。 序列的每个跨度具有用于传输光纤上的波长并且最接近跨度的输入的主要局部最大光功率点。 运输导致每个信号的累积色散发展使得每跨度的每个跨度的残余分散是正的，并且在其它跨度上是负的。 在主要局部最大功率点，信号的累积分散幅度以微微秒/纳米为单位，保持在比特率（千比特每秒）的倒数的32000倍以下。

    Group III-nitride layers with patterned surfaces
    6.
    发明授权
    Group III-nitride layers with patterned surfaces 有权
    具有图案化表面的III族氮化物层

    公开(公告)号：US07084563B2

    公开(公告)日：2006-08-01

    申请号：US11180350

    申请日：2005-07-13

    Applicant: Aref Chowdhury ,  Hock Min Ng ,  Richart Elliott Slusher

    Inventor： Aref Chowdhury ,  Hock Min Ng ,  Richart Elliott Slusher

    IPC: H01J1/62 ,  H01L33/00

    CPC classification number: B82Y20/00 ,  B81B1/00 ,  G02B6/1225 ,  G02B2006/12035 ,  H01J1/304 ,  H01J3/022 ,  H01J9/025 ,  H01L21/0254 ,  H01L21/02639 ,  H01L21/30612

    Abstract: An apparatus includes a crystalline substrate, a layer of a first group III-nitride located on a planar surface of the substrate, and a layer of a second group III-nitride located over the layer of the first group III-nitride. The first and second group III-nitrides have different alloy compositions. The layer of second group III-nitride may have a pattern of columnar holes or trenches therein. The apparatus may include a plurality of pyramidal field-emitters that include the second group III-nitride.

    Abstract translation: 一种装置包括晶体衬底，位于衬底的平面表面上的第一III族氮化物层和位于第一III族氮化物层上的第二III族氮化物层。 第一和第二III族氮化物具有不同的合金组成。 第二III族氮化物的层可以具有柱状孔或其中的沟槽的图案。 该装置可以包括多个金字塔形场致发射体，其包括第二III族氮化物。

    Optical wavelength-conversion
    7.
    发明申请
    Optical wavelength-conversion 审中-公开
    光波长转换

    公开(公告)号：US20050244159A1

    公开(公告)日：2005-11-03

    申请号：US10835753

    申请日：2004-04-30

    Applicant: Aref Chowdhury ,  Christopher Doerr ,  Gregory Raybon

    Inventor： Aref Chowdhury ,  Christopher Doerr ,  Gregory Raybon

    IPC: G02B6/34 ,  H04J14/06

    CPC classification number: H04J14/02 ,  H04J14/06

    Abstract: An apparatus includes an optical wavelength-converter and a polarization splitter. The polarization splitter is configured to receive input and pump light, to direct a first polarization component of the received input and pump light to a first optical path, and to direct a second polarization component of the received input and pump light to a separate second optical path. The optical wavelength-converter has first and second optical ports. The first optical port is at an end of the first optical path. The second port is at an end of the second optical path. The wavelength-converter outputs wavelength-converted light from one of the ports in response to receiving the input and pump light at the other of the ports. The two optical paths may include polarization-maintaining optical waveguides. The polarization splitter and optical paths may be configured to transmit substantially the same pump light intensity to the two optical ports.

    Abstract translation: 一种装置包括光波长转换器和偏振分离器。 偏振分离器被配置为接收输入和泵浦光，以将接收到的输入和泵浦光的第一偏振分量引导到第一光路，并且将接收的输入和泵浦光的第二偏振分量引导到单独的第二光学 路径。 光波长转换器具有第一和第二光端口。 第一光口位于第一光路的一端。 第二端口处于第二光路的一端。 响应于接收另一个端口处的输入和泵浦光，波长转换器从一个端口输出波长转换的光。 两个光路可以包括偏振保持光波导。 偏振分离器和光路可以被配置为将基本相同的泵浦光强度传输到两个光学端口。

    Group III-nitride layers with patterned surfaces
    8.
    发明授权
    Group III-nitride layers with patterned surfaces 有权
    具有图案化表面的III族氮化物层

    公开(公告)号：US08070966B2

    公开(公告)日：2011-12-06

    申请号：US12315202

    申请日：2008-12-01

    Applicant: Aref Chowdhury ,  Hock Ng ,  Richart Elliott Slusher

    Inventor： Aref Chowdhury ,  Hock Ng ,  Richart Elliott Slusher

    IPC: C25F3/00 ,  C03C25/68 ,  H01L21/461

    CPC classification number: B82Y20/00 ,  B81B1/00 ,  G02B6/1225 ,  G02B2006/12035 ,  H01J1/304 ,  H01J3/022 ,  H01J9/025 ,  H01L21/0254 ,  H01L21/02639 ,  H01L21/30612

    Abstract: A fabrication method produces a mechanically patterned layer of group III-nitride. The method includes providing a crystalline substrate and forming a first layer of a first group III-nitride on a planar surface of the substrate. The first layer has a single polarity and also has a pattern of holes or trenches that expose a portion of the substrate. The method includes then, epitaxially growing a second layer of a second group III-nitride over the first layer and the exposed portion of substrate. The first and second group III-nitrides have different alloy compositions. The method also includes subjecting the second layer to an aqueous solution of base to mechanically pattern the second layer.

    Abstract translation: 制造方法产生III族氮化物的机械图案化层。 该方法包括提供晶体衬底并在衬底的平坦表面上形成第一III族氮化物的第一层。 第一层具有单一极性，并且还具有露出基板的一部分的孔或沟槽的图案。 该方法包括在第一层和衬底的暴露部分上外延生长第二III族氮化物层的第二层。 第一和第二III族氮化物具有不同的合金组成。 该方法还包括使第二层经受基底水溶液以机械地图形化第二层。

    SURFACE-PLASMON-ASSISTED OPTICAL FREQUENCY CONVERSION
    9.
    发明申请
    SURFACE-PLASMON-ASSISTED OPTICAL FREQUENCY CONVERSION 有权
    表面 - 等离子体辅助光学频率转换

    公开(公告)号：US20110128614A1

    公开(公告)日：2011-06-02

    申请号：US13018997

    申请日：2011-02-01

    Applicant: Girsh Blumberg ,  Aref Chowdhury

    Inventor： Girsh Blumberg ,  Aref Chowdhury

    IPC: G02F1/37 ,  G02B6/00

    CPC classification number: G02B6/1226 ,  B82Y20/00 ,  G02F1/0356 ,  G02F1/3532 ,  G02F1/3534 ,  G02F1/3536 ,  G02F2001/3548 ,  G02F2201/066 ,  G02F2201/127 ,  G02F2202/20 ,  G02F2203/10

    Abstract: A frequency-conversion method that uses a nonlinear optical process to transfer energy between a surface-plasmon (SP) wave that is guided along an electrically conducting strip and a light beam that is guided along an optical waveguide whose core is adjacent to the electrically conducting strip. A periodic structure spatially modulates the nonlinear susceptibility of the waveguide core with a spatial period that is related to a momentum mismatch in the nonlinear optical process. The spatial modulation provides quasi-phase matching for the SP wave and the light beam and enables efficient energy transfer between them.

    Abstract translation: 一种频率转换方法，其使用非线性光学方法在沿着导电条带引导的表面等离子体（SP）波之间传递能量，并且沿着沿与光导体相邻的光波导引导的光束 跳闸。 周期性结构利用与非线性光学过程中的动量失配相关的空间周期空间调制波导芯的非线性磁化率。 空间调制为SP波和光束提供准相位匹配，并实现它们之间的有效能量传递。

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