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    Optical communication system optically combining both baseband and passband signals
    3.
    发明授权
    Optical communication system optically combining both baseband and passband signals 有权
    光通信系统光学地组合基带和通带信号

    公开(公告)号：US06763193B1

    公开(公告)日：2004-07-13

    申请号：US09450823

    申请日：1999-11-29

    申请人： Naresh Chand ,  Thomas Henry Daugherty ,  Wouterus Muys ,  Yong-Kwan Park ,  Venkataraman Swaminathan

    发明人： Naresh Chand ,  Thomas Henry Daugherty ,  Wouterus Muys ,  Yong-Kwan Park ,  Venkataraman Swaminathan

    IPC分类号： H04J1400

    CPC分类号： H04N7/22 ,  H04B10/272 ,  H04B10/503 ,  H04B10/506 ,  H04B10/5161 ,  H04B10/5561 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

    摘要： This invention is a new communication system in which multichannel broadcast digital services are distributed to each user with the broadcast services signal riding in the passband above a digital baseband signal. The system can deliver more than 1 Gbps additional bandwidth to each subscriber. The passband bandwidth will accommodate growth in downstream services including video on demand, higher speed web downloads including improved streaming audio and video, HDTV, interactive video, and personalized video. The invention requires only a single fiber path and a single optical receiver for each user or group of users. A single fiber, single optical receiver system is much less expensive than two systems, one transmitting baseband and the other passband. A single receiver is greatly cost beneficial to achieving economical fiber to the home.

    摘要翻译： 本发明是一种新的通信系统，其中多通道广播数字业务被分配给每个用户，广播业务信号在数字基带信号上方通过通带。 该系统可以为每个用户提供超过1 Gbps的附加带宽。 通带带宽将适应下游业务的增长，包括视频点播，更高速度的网络下载，包括改进的流式音频和视频，HDTV，交互式视频和个性化视频。 本发明对于每个用户或用户组仅需要单个光纤路径和单个光接收机。 单光纤单光接收机系统比两个系统便宜得多，一个发射基带和另一个通带。 单个接收器对于实现经济的光纤到家是非常有益的。

    Sensors Incorporating Freestanding Carbon NanoStructures
    4.
    发明申请
    Sensors Incorporating Freestanding Carbon NanoStructures 审中-公开
    包含独立碳纳米结构的传感器

    公开(公告)号：US20130256627A1

    公开(公告)日：2013-10-03

    申请号：US12490484

    申请日：2009-06-24

    申请人： Himanshu Jain ,  Venkataraman Swaminathan ,  Jiri Cech

    发明人： Himanshu Jain ,  Venkataraman Swaminathan ,  Jiri Cech

    IPC分类号： H01L31/028 ,  H01L31/18

    CPC分类号： H01L31/028 ,  B82Y10/00 ,  G01J5/023 ,  G01J5/024 ,  G01J5/0853 ,  G01J5/20 ,  H01L27/305 ,  H01L31/1804 ,  H01L51/0048

    摘要： Sensors for detecting IR radiation, UV radiation, X-Rays, light, gas, and chemicals. The sensors herein incorporate freestanding carbon nanostructures, such as single-walled carbon nanotubes (“SWCNT”), atomically thin carbon sheets having a thickness of about between 1 atom and about 5 atoms (“graphene”), and combinations thereof. The freestanding carbon nanostructures are suspended above a substrate by a plurality of conductors, each conductor electrically connected to the carbon nanostructure. In one method of manufacture, a resonance chamber is formed under the carbon nanostructure by etching of the substrate, yielding a sensor wherein the resonance chamber is bounded by at least the substrate and the carbon nanostructure.

    摘要翻译： 用于检测红外辐射，紫外线辐射，X射线，光，气体和化学物质的传感器。 本文中的传感器包括独立的碳纳米结构，例如单壁碳纳米管（“SWCNT”），具有约1原子和约5个原子之间的厚度的原子薄碳片（“石墨烯”）及其组合。 独立的碳纳米结构通过多个导体悬挂在基板上方，每个导体电连接到碳纳米结构。 在一种制造方法中，通过蚀刻基板在碳纳米结构下形成共振室，产生传感器，其中共振室至少由基底和碳纳米结构界定。

    Enhanced sensitivity vibrometer
    5.
    发明授权
    Enhanced sensitivity vibrometer 有权
    增强灵敏度测振仪

    公开(公告)号：US08072609B1

    公开(公告)日：2011-12-06

    申请号：US12345861

    申请日：2008-12-30

    申请人： Sudhir Trivedi ,  Venkataraman Swaminathan ,  Chen-Chia Wang

    发明人： Sudhir Trivedi ,  Venkataraman Swaminathan ,  Chen-Chia Wang

    IPC分类号： G01B9/02

    CPC分类号： G01H9/00 ,  G01D5/266

    摘要： An enhanced sensitivity laser vibrometer with increased output signal strength and more sensitive surface vibration detection, is provided by using a reflective mirror assembly to repeatedly bounce the sensing laser beam against the acoustic pressure-sensing diaphragm to magnify the acoustic incident pressure wave being detected. The enhancement in signal strength, in terms of power spectral density, is a function of the number of bounces squared and the detection of surface vibrations with a displacement of smaller than 4 picometers is demonstrated experimentally.

    摘要翻译： 通过使用反射镜组件来重复地将感测激光束反弹抵抗声压感测膜，以增大被检测到的声学入射压力波，提供具有增加的输出信号强度和更灵敏的表面振动检测的增强灵敏度激光振动计。 在功率谱密度方面，信号强度的增强是反射数平方的函数，并且通过实验证明了具有小于4皮米位移的表面振动的检测。

    Dual color retro-reflection sensing device
    6.
    发明授权
    Dual color retro-reflection sensing device 有权
    双色反光感测装置

    公开(公告)号：US08063348B1

    公开(公告)日：2011-11-22

    申请号：US12476581

    申请日：2009-06-02

    申请人： Venkataraman Swaminathan ,  Paul D. Willson ,  Deepak Bupathi

    发明人： Venkataraman Swaminathan ,  Paul D. Willson ,  Deepak Bupathi

    IPC分类号： G01C21/02 ,  G06M7/00

    CPC分类号： G01S17/026 ,  G01S7/4802

    摘要： A system for detection of optical type devices being used by an enemy sniper subject without alerting the enemy is shown. A coherent laser beam of a wave length in the visible color range, is sent along an axis and passing through a beam splitter device. A detection means is arranged to generate a signal when it detects retro-reflections from the target optical devices or subject including clutter reflections in a 180 degree direction relative to axis. The detection means is coaxially mounted with the source of illumination with a second detection means off axis therefrom to generate a second detection signal when it detects clutter reflections from the target optical devices or subject. A comparator means forms a difference signal between the retro-reflected detection signal and the second detection signal and indicates when the difference signal exceeds a predetermined threshold.

    摘要翻译： 示出了用于检测敌方狙击手所使用的光学类型装置的系统，而不向敌人发出警报。 可见色范围内的波长相干激光束沿轴线传送并通过分束器装置。 检测装置被布置成当其从目标光学装置或被摄体检测到包括相对于轴线的180度方向上的杂波反射的反射时产生信号。 当检测装置检测到来自目标光学装置或被摄体的杂波反射时，检测装置与照明源同轴地安装有离开其的轴线的第二检测装置，以产生第二检测信号。 比较器装置在反射检测信号和第二检测信号之间形成差分信号，并指示差信号何时超过预定阈值。

    Methods for Target Tracking, Classification and Identification by Using Foveal Sensors
    8.
    发明申请
    Methods for Target Tracking, Classification and Identification by Using Foveal Sensors 审中-公开
    通过使用中心凹传感器进行目标跟踪，分类和识别的方法

    公开(公告)号：US20110279682A1

    公开(公告)日：2011-11-17

    申请号：US12945640

    申请日：2010-11-12

    申请人： Le Li ,  Venkataraman Swaminathan ,  Paul D. Willson ,  Haiping Yu ,  Shenggang Wang ,  Lei Guo ,  Fang Du ,  Peng Li ,  Mark Massie

    发明人： Le Li ,  Venkataraman Swaminathan ,  Paul D. Willson ,  Haiping Yu ,  Shenggang Wang ,  Lei Guo ,  Fang Du ,  Peng Li ,  Mark Massie

    IPC分类号： H04N5/225

    CPC分类号： H04N5/23245 ,  G01S3/786

    摘要： A method of operating a sensor system may include the steps of sensing a predetermined area including a first object to obtain first sensor data at a first predetermined time, sensing the substantially same predetermined area including the first object to obtain second sensor data at a second predetermined time, determining a difference between the first sensor data and the second sensor data, identifying a target based upon the difference between the first sensor data and the second sensor data, identifying a material of the target and determining a target of interest to track based upon the material of the target.

    摘要翻译： 操作传感器系统的方法可以包括以下步骤：感测包括第一对象的预定区域，以在第一预定时间获得第一传感器数据，感测基本相同的包括第一对象的预定区域，以获得第二预定的第二传感器数据 确定第一传感器数据和第二传感器数据之间的差异，基于第一传感器数据和第二传感器数据之间的差异识别目标，识别目标的材料并基于 目标的材料。

    System and methods for assessing the suitability of analog lasers for broadband access applications
    9.
    发明授权
    System and methods for assessing the suitability of analog lasers for broadband access applications 失效
    用于评估模拟激光器适用于宽带接入应用的系统和方法

    公开(公告)号：US5767995A

    公开(公告)日：1998-06-16

    申请号：US596899

    申请日：1996-03-13

    申请人： Attilio J. Rainal ,  Venkataraman Swaminathan

    发明人： Attilio J. Rainal ,  Venkataraman Swaminathan

    IPC分类号： H04B10/155 ,  H04J14/02

    CPC分类号： H04B10/504 ,  H04B10/541 ,  H04B10/58 ,  H04J14/0298

    摘要： A system and method for predicting the ratio of the strength of the carrier signal to the strength of nonlinear distortion (C/NLD) generated by a communications laser is disclosed. The method jointly evaluates the individual distortion components arising from laser clipping and from inherent laser P-I nonlinearity. According to the method, the laser P-I curve is measured with high precision to quantify the P-I nonlinearity. Various derivatives of the P-I curve are determined and then utilized to calculate C/NLD as a function of a communications network parameter such as the optical modulation index per channel or rms modulation index. Based on this information, the laser can be identified in terms of its sensitivity to RF drive variations in the field. Lasers can be tagged, etc., depending on their C/NLD sensitivity. In this manner, a laser having a C/NLD ratio appropriate for the requirements of a broadband transmission network, such as a SCM CATV system, can be selected and installed in such a system.

    摘要翻译： 公开了一种用于预测载波信号的强度与通信激光器产生的非线性失真强度（C / NLD）的比率的系统和方法。 该方法联合评估由激光削波产生的各个失真分量和固有激光P-I非线性。 根据该方法，以高精度测量激光P-I曲线以量化P-I非线性。 确定P-I曲线的各种导数，然后用于计算作为通信网络参数的函数的C / NLD，例如每个信道的光调制指数或均方根调制指数。 基于该信息，可以根据其对现场RF驱动变化的灵敏度来识别激光。 激光器可以被标记等，这取决于它们的C / NLD灵敏度。 以这种方式，可以选择并安装具有适合于诸如SCM CATV系统的宽带传输网络的要求的C / NLD比率的激光器。