REDUCING CROSSTALK IN FREE-SPACE OPTICAL COMMUNICATIONS
    71.
    发明申请
    REDUCING CROSSTALK IN FREE-SPACE OPTICAL COMMUNICATIONS 审中-公开
    减少自由空间光通信中的串扰

    公开(公告)号:WO2008105800A2

    公开(公告)日:2008-09-04

    申请号:PCT/US2007/015705

    申请日:2007-07-10

    CPC classification number: H04B10/118 H04B10/1121

    Abstract: An optical transmitter includes a modulator, a dispersion adjustment module, and an optical amplifier. The optical transmitter is configured to transmit optical pulses over a free-space optical communication channel. The modulator is configured to produce an optical carrier that is amplitude and/or phase modulated by data. The dispersion adjustment module is connected between the modulator and the amplifier and is configured to substantially change temporal widths of optical pulses received from the modulator by changing dispersions of the received optical pulses.

    Abstract translation: 光发射机包括调制器,色散调节模块和光放大器。 光发射器被配置为通过自由空间光通信信道发送光脉冲。 调制器被配置为产生由数据幅度和/或相位调制的光载波。 色散调整模块连接在调制器和放大器之间,并且被配置为通过改变所接收的光脉冲的色散来实质上改变从调制器接收的光脉冲的时间宽度。

    COMMUNICATION TRANSCEIVER ARCHITECTURE
    72.
    发明申请
    COMMUNICATION TRANSCEIVER ARCHITECTURE 审中-公开
    通信收发器架构

    公开(公告)号:WO2007016537A3

    公开(公告)日:2007-05-10

    申请号:PCT/US2006029870

    申请日:2006-08-01

    CPC classification number: H04B10/1125 H04B10/118

    Abstract: A free-space communication transceiver includes a telescope for transmitting and receiving laser beams, a tunable laser transmitter for generating a transmit laser beam modulated with data, a tunable optical receiver for processing a receive laser beam received from the telescope to recover data, and a tunable beamsplitter that directs the transmit laser beam to the telescope and directs the receive laser beam from the telescope to the optical receiver. Between the telescope and beamsplitter, the transmit and receive laser beams travel along a common optical axis as collinear collimated free-space beams. The transmit and receive laser beams operate at different wavelengths that can be interchanged, thereby support full-duplex operation. The beamsplitter employs a tunable etalon filter whose wavelength-dependent transmission characteristics are adjusted according to the transmit and receive wavelengths. Optionally, RF signals can additionally be couple to the common optical axis and transmitted and received by the telescope.

    Abstract translation: 自由空间通信收发器包括用于发送和接收激光束的望远镜,用于产生用数据调制的发射激光束的可调谐激光发射器,用于处理从望远镜接收的接收激光束以恢复数据的可调谐光接收机,以及 可调谐分束器将发射激光束引导到望远镜,并将接收激光束从望远镜引导到光接收器。 在望远镜和分束器之间,发射和接收激光束作为共线准直自由空间光束沿共同的光轴行进。 发射和接收激光束以可互换的不同波长工作,从而支持全双工操作。 分束器采用可调标准具滤波器,其波长相关传输特性根据发射和接收波长进行调整。 可选地,RF信号还可以耦合到共同的光轴并被望远镜发射和接收。

    A METHOD AND SYSTEM FOR FREE-SPACE COMMUNICATION
    73.
    发明申请
    A METHOD AND SYSTEM FOR FREE-SPACE COMMUNICATION 审中-公开
    一种自由空间通信的方法和系统

    公开(公告)号:WO03026166A3

    公开(公告)日:2003-09-25

    申请号:PCT/IL0200770

    申请日:2002-09-17

    CPC classification number: H04B10/1121 H04B10/118 H04B10/60

    Abstract: Optical signals emanating from the tip of an optical communication fiber can be converted, using a non-linear crystal, to signals (carrier waves) whose wavelength fall in the range of far infra-red to RF. These longer wavelength converted signals maintain the modulation of the original data. Dense fog is inherently opaque to near infra-red waves used in fiber optics communications and relatively transparent to these longer wavelengths. The modulated long wave radiation can, therefore, serve to transmit data from a fiber tip through free space under foggy (and possibly other) prevailing weather conditions. The original optical wave may be recovered by reconverting the received long wave radiation in a heterodyning process taken place in a non-linear crystal with continuous wave laser radiation of an appropriate wave length. Consequently, fiber optics communications networks can be inter-connected seamlessly through a far infra-red/RF free space link.

    Abstract translation: 从光通信光纤的尖端发出的光信号可以使用非线性晶体转换成其波长在远红外范围内的信号(载波)到RF。 这些较长波长转换的信号保持原始数据的调制。 密集的雾对于在光纤通信中使用的近红外波具有固有的不透明度,并且对这些较长波长相对透明。 因此,调制的长波辐射可以用于在有雾(也可能是其他)主要的天气条件下将数据从光纤尖端传送到自由空间。 可以通过在具有适当波长的连续波激光辐射的非线性晶体中发生的外差处理中重新接收接收的长波辐射来恢复原始光波。 因此,光纤通信网络可以通过远红外/无RF空间链路无缝连接。

    VORRICHTUNG UND EINE ANLAGE ZUR OPTISCHEN ÜBERTRANGUNG VON DATEN ZWISCHEN SATELLITEN
    74.
    发明申请
    VORRICHTUNG UND EINE ANLAGE ZUR OPTISCHEN ÜBERTRANGUNG VON DATEN ZWISCHEN SATELLITEN 审中-公开
    设备和卫星之间用于光学ÜBERTRANGUNGDATA植物

    公开(公告)号:WO2002084902A2

    公开(公告)日:2002-10-24

    申请号:PCT/DE2002/001383

    申请日:2002-04-12

    CPC classification number: H04B10/118 H04B2210/258

    Abstract: Die Erfindung betrifft eine Vorrichtung und eine Anlage zur Übertragung von optischen Daten zwischen Satelliten, die einen Laser-Oszillator (10) zur Erzeugung eines optischen Signals, einen Modulator (11) zur Modulierung des optischen Signals mit einer Dateninformation und eine Verstärkeranordnung, eine Kollimatoranordnung und eine Sendeeinrichtung zur Übertragung der Signale umfasst. Es ist vorgesehen, dass ein Vorverstärker (12) mit einer Leistungsteilerstufe (13) verbunden ist, der eine Parallelschaltung von wenigstens zwei jeweils in Reihe geschalteten Phasenstellern (14) und Hauptverstärkern (15), zur Verstärkung und Einstellung der optischen Signale, nachgeschaltet ist und die Hauptverstärker (15) über ein der Anzahl der Reihenschaltung entsprechendes Bündel (16) von optischen Wellenleitungen mit der entsprechenden anzahl der Kollimatoren (17) verbunden sind.

    Abstract translation: 本发明涉及一种装置和用于光学数据的传输具有用于产生用于调节与数据信息和放大器装置,准直装置的光信号的光信号,一个调制器(11)的激光振荡器(10),卫星之间的植物,并 包括一个发送装置,用于发送的信号。 可以设想,一个前置放大器(12),其具有功率分配器级(13)被连接,其连接放大和光信号的调整,至少两个相应的串联连接的移相器(14)和主放大器(15)的并联连接的下游和 主放大器(15)经由对应于束(16)准直器(17)的相应数量的光学波导的数量的串联电路相连。

    MODULATING RETROREFLECTOR USING MULTIPLE QUANTUM WELL TECHNOLOGY
    75.
    发明申请
    MODULATING RETROREFLECTOR USING MULTIPLE QUANTUM WELL TECHNOLOGY 审中-公开
    使用多种量子阱技术调制回波器

    公开(公告)号:WO99066367A1

    公开(公告)日:1999-12-23

    申请号:PCT/US1999/010789

    申请日:1999-05-17

    CPC classification number: H04B10/2587 H04B10/118

    Abstract: A system for remote optical communications includes a base station and a remote station. The remote station includes a retroreflector, a multiple quantum well modulator (MQW), and drive circuitry that drives the MQW. A base station transmitter sends an interrogating light beam to the MQW, which modulates the light beam based on the information in the electrical signal from the drive circuitry. The retroreflector reflects the modulated light beam to the base station for detection by a receiver.

    Abstract translation: 用于远程光通信的系统包括基站和远程站。 远程站包括后向反射器,多量子阱调制器(MQW)以及驱动MQW的驱动电路。 基站发射机向MQW发送询问光束,MQW根据来自驱动电路的电信号中的信息调制光束。 后向反射器将调制的光束反射到基站,以便由接收机检测。

    OPTICAL COMMUNICATION SYSTEM
    76.
    发明申请
    OPTICAL COMMUNICATION SYSTEM 审中-公开
    光通信系统

    公开(公告)号:WO99012286A1

    公开(公告)日:1999-03-11

    申请号:PCT/US1998/018192

    申请日:1998-09-01

    Abstract: A high speed optical receiver (fig. 1) for receiving a substantially diminished optical signal. An optical amplifier (6) amplifies the diminished optical signal at least at several db and an ultra narrow-band filter filters (8) the noise generated in the optical amplifier (6) to produce a filtered amplified optical signal which is detected by a fast response photo detector (10). In a preferred embodiment the optical amplifier is a semiconductor laser amplifier. In this embodiment a Faraday filter provides the ultra narrow-band filtering, virtually eliminating the noise produced by the amplifier. Transmitters are described for transmitting information at a wavelength tuned to the ultra narrow-band filters.

    Abstract translation: 一种用于接收基本上减小的光信号的高速光接收器(图1)。 光放大器(6)至少在几个db处放大减小的光信号,并且在超宽带滤波器(8)中放大在光放大器(6)中产生的噪声,以产生经过滤波的放大的光信号,其被快速检测 响应光电检测器(10)。 在优选实施例中,光放大器是半导体激光放大器。 在该实施例中,法拉第滤波器提供超窄带滤波,实际上消除了由放大器产生的噪声。 发射机被描述为以调谐到超窄带滤波器的波长发送信息。

    SYSTEM FOR PROVIDING LOCATION-SPECIFIC DATA TO A USER
    77.
    发明申请
    SYSTEM FOR PROVIDING LOCATION-SPECIFIC DATA TO A USER 审中-公开
    向用户提供位置特定数据的系统

    公开(公告)号:WO1998020631A1

    公开(公告)日:1998-05-14

    申请号:PCT/US1997019919

    申请日:1997-10-31

    CPC classification number: H04B10/118 H04B7/18523

    Abstract: An FDMA/TDM satellite-based broadcast system is used to provide digital maps (120) and other type of data to users at remote locations. User selection of the desired data is achieved by monitoring the TDM downlink channels (30) of the broadcast system in accordance with a specific schedule or until a specific identification code is detected. The user terminals (22) are equipped with Global Positioning System receivers (84) which allow the position of the users to be determined. Based on the user position, the user terminal (22) are able to convert general data to location-specific data tailored to the need of the user. The general data may comprise a digital map covering a wide geographic area, and the location-specific data may comprise a map (120) covering a portion of the geographic region where the user is located.

    Abstract translation: 使用基于FDMA / TDM卫星的广播系统向远程位置的用户提供数字地图(120)和其他类型的数据。 通过根据特定调度监视广播系统的TDM下行链路信道(30)或者直到检测到特定的识别码来实现所需数据的用户选择。 用户终端(22)配备有全球定位系统接收器(84),其允许确定用户的位置。 基于用户位置,用户终端(22)能够将一般数据转换为根据用户的需要定制的位置特定数据。 一般数据可以包括覆盖广泛地理区域的数字地图,并且位置特定数据可以包括覆盖用户所在地理区域的一部分的地图(120)。

    M-ARY FREQUENCY PRESENCE MODULATION COMMUNICATION SYSTEM AND METHOD

    公开(公告)号:WO2019112774A1

    公开(公告)日:2019-06-13

    申请号:PCT/US2018/061415

    申请日:2018-11-16

    Abstract: An optical communication system that includes a data transmitter. The data transmitter includes at least one optical emission device configured to output light energy as an optical beam having an operating bandwidth; a beam dividing device arranged to receive and divide the operating bandwidth of the optical beam into bandwidth portions of plural communication bands; a focusing grating; and a digital mirror array having a plurality of digital mirrors. In an imaging mode, the optical communication system is configured to perform hyperspectral imaging by setting all of the plurality of digital mirrors to positions that transmit all wavelengths of a communication band among the plural communication bands to the focusing grating.

    混频发射装置
    79.
    发明申请
    混频发射装置 审中-公开

    公开(公告)号:WO2017215480A1

    公开(公告)日:2017-12-21

    申请号:PCT/CN2017/087173

    申请日:2017-06-05

    CPC classification number: H04B1/04 H04B7/00 H04B10/118

    Abstract: 本发明涉及一种混频发射装置。该混频发射装置,连接于Ka波段卫星调制解调器,包括PCB板以及贴装在PCB板上的本地振荡模块、滤波模块、混频模块、微带天线模块和功率放大模块。混频模块能够将从调制解调器输出的中频信号上变到高频信号,并且通过下一级的功率放大模块将信号功率放大,最后通过微带天线模块发射出去。该混频发射装置采用模块化的设计思路,用工艺简单的表面贴装技术将各个功能模块贴合在PCB板上,免除引线接合的工艺步骤,成本低,同时还有利于产品在高频段的调试以及高频段电路的工艺一致性,具有电路的小型化且集成度高的优点。

    SYSTEM AND METHOD FOR HIGH SPEED SATELLITE-BASED FREE-SPACE LASER COMMUNICATIONS USING AUTOMATIC GAIN CONTROL
    80.
    发明申请
    SYSTEM AND METHOD FOR HIGH SPEED SATELLITE-BASED FREE-SPACE LASER COMMUNICATIONS USING AUTOMATIC GAIN CONTROL 审中-公开
    基于自动增益控制的高速卫星自由空间激光通信系统和方法

    公开(公告)号:WO2017205652A1

    公开(公告)日:2017-11-30

    申请号:PCT/US2017/034523

    申请日:2017-05-25

    Inventor: WISWELL, Eric

    Abstract: A high speed satellite-based laser communications system and method for communications between a satellite-based transmitter system and a ground-based receiver over a free space optical link. The satellite-based transmitter system includes an encoder to encode data, a polarization modulator to linearly polarize the encoded data, one or at least two transmitters to transmit the laser beam, and a quarter-wave optical wave plate to circularly polarize the signal to be transmitted. The ground-based receiver includes an automatic gain control to apply AGC to the received data before the polarizations are reversed and the data is decoded. The system enables an increased data throughput and reduces or eliminates the effects of signal fading.

    Abstract translation: 基于卫星的高速激光通信系统和方法,用于通过自由空间光链路在基于卫星的发射机系统和地面接收机之间进行通信。 基于卫星的发射机系统包括用于编码数据的编码器,用于线性极化编码数据的偏振调制器,用于发射激光束的一个或至少两个发射器,以及用于将信号圆偏振以形成波长的四分之一波长光学波片 传输。 地面接收器包括一个自动增益控制,在极化反转并解码数据之前,将AGC应用于接收的数据。 该系统可提高数据吞吐量,并减少或消除信号衰落的影响。

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