专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US06731878B1 Free space optical communication link with diversity 有权
标题翻译：自由空间光通信链路具有多样性
公开(公告)号：US06731878B1
公开(公告)日：2004-05-04
申请号：US09640576
申请日：2000-08-17
申请人： David M. Britz , Jeevan Prakash Dodley , Robert R. Miller
发明人： David M. Britz , Jeevan Prakash Dodley , Robert R. Miller
IPC分类号： H04J1402
CPC分类号： H04B10/1121 , H04B10/1125 , H04J14/02
摘要： A free space communication system includes first and second terminals, and the first terminal includes a transmitter to transmit an input signal. The transmitter has plural laser sources, at least one optical delay line and a telescope. Each laser source modulates the input signal onto a wavelength that is distinct from a wavelength of each other laser source. The plural laser sources include a first laser source and at least one other laser source, and the at least one optical delay line is coupled to a respective output of the at least one other laser source. The telescope projects an output of the first laser source and an output of each of the at least one optical delay line toward the second terminal. Alternatively, a free space communication system includes first and second terminals, and the first terminal includes a transmitter to transmit an input signal. The transmitter has at least one electrical delay line, plural laser sources and a telescope. The at least one electrical delay line delays the input signal. The plural laser sources include a first laser source and at least one other laser source, the first laser source modulates the input signal onto a first wavelength, and each of the at least one other laser source modulates an output of a corresponding electrical delay line onto a wavelength that is distinct from the first wavelength. The telescope projects an output of each of the plural laser sources toward the second terminal.
摘要翻译：自由空间通信系统包括第一和第二终端，并且第一终端包括用于发送输入信号的发射机。发射机具有多个激光源，至少一个光学延迟线和望远镜。每个激光源将输入信号调制成与每个其它激光源的波长不同的波长。所述多个激光源包括第一激光源和至少一个其它激光源，并且所述至少一个光学延迟线耦合到所述至少一个其它激光源的相应输出。望远镜将第一激光源的输出和至少一个光延迟线中的每一个的输出朝向第二端投影。或者，自由空间通信系统包括第一和第二终端，并且第一终端包括用于发送输入信号的发射机。发射机具有至少一个电延迟线，多个激光源和望远镜。至少一个电延迟线延迟输入信号。所述多个激光源包括第一激光源和至少一个其它激光源，所述第一激光源将所述输入信号调制到第一波长上，并且所述至少一个其它激光源中的每一个将相应的电延迟线的输出调制到与第一波长不同的波长。望远镜将多个激光源中的每一个的输出朝向第二终端投影。

22. 外观设计

USD283890S Calling card telephone 失效
公开(公告)号：USD283890S
公开(公告)日：1986-05-20
申请号：US728380
申请日：1985-04-29
申请人： David M. Britz , Donald M. Genaro , John N. McGarvey , Michael P. Zambelli
设计人： David M. Britz , Donald M. Genaro , John N. McGarvey , Michael P. Zambelli

23. 发明授权

US08259933B2 Secure open-air communication system utilizing multi-channel decoyed transmission 有权
标题翻译：利用多渠道诱捕传输的安全露天通信系统
公开(公告)号：US08259933B2
公开(公告)日：2012-09-04
申请号：US12907417
申请日：2010-10-19
申请人： David M. Britz , Robert Raymond Miller, II , Nemmara K. Shankaranarayanan
发明人： David M. Britz , Robert Raymond Miller, II , Nemmara K. Shankaranarayanan
IPC分类号： H04K1/10
CPC分类号： H04B10/85 , H04B10/11 , H04K1/003 , H04K1/02 , H04K1/10 , H04L63/0428 , H04L2209/80 , H04Q11/0003
摘要： A secure, open-air communication system utilizes a plurality of “decoy” data signals to hide one or more true data signals. The true data signal(s) are channel hopped with the plurality of decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted in an open-air communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting both the true and decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).
摘要翻译：安全的露天通信系统利用多个“诱饵”数据信号来隐藏一个或多个真实数据信号。真数据信号与多个诱饵数据信号进行信道跳频，以形成随后在露天通信系统中发送的多信道“加扰”输出信号。诱饵信号的数量越多，对露天系统的安全性就越大。可以通过在加扰之前加密真实信号和诱饵信号和/或通过利用空间不同的发射器和接收器组来提供进一步的安全性。窃听者无需知道真实信号的信道分配，就可以拦截（并且随着时间的推移，或许解扰）露天传输的信号，将无法区分真实数据从诱饵而不知道频道分配。

24. 发明授权

US07295777B1 Optical/radio local access network 有权
公开(公告)号：US07295777B1
公开(公告)日：2007-11-13
申请号：US11442924
申请日：2006-05-30
申请人： David M. Britz , Jeevan Prakash Dodley , Lih-Yuan Lin , Robert R. Miller
发明人： David M. Britz , Jeevan Prakash Dodley , Lih-Yuan Lin , Robert R. Miller
IPC分类号： H04J14/00 , H04B10/00
CPC分类号： H04J14/02 , H04B10/1125 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J14/0283 , H04J14/0298 , H04Q11/0067 , H04Q2011/0016 , H04Q2011/003
摘要： A communication system includes a plurality of nodes and a plurality of point-to-point links that interconnect the plurality of nodes into a network. Each node includes an optical switch to controllably route a plurality of in-ports of the optical switch into a plurality of out-ports of the optical switch. Each point-to-point link includes a free space optical channel. A first free space optical channel couples to a first node through a receive path and through a transmit path. The receive path couples to a respective in-port of the optical switch of the first node, and the transmit path couples to a respective out-port of the optical switch of the first node. In an alternative embodiment, a communication hub includes a plurality of neighborhood links to corresponding users, an optical switch coupled to the plurality of neighborhood links, and a trunk coupled between the optical switch and a free space optical channel link to the network. A method of communicating in a network having plural links includes sensing the presence of a received signal failure by monitoring channel losses in a first link, the received signal failure resulting from at least one of rain and fog. The method further includes sending data in a free space optical channel of the first link when the received signal failure sensed is due to rain and sending the data in an RF channel of the first link when the received signal failure sensed is due to fog.

25. 发明授权

US06973269B1 Metropolitan networks based on fiber and free space access distribution system 失效
标题翻译：基于光纤和自由空间接入分配系统的城域网
公开(公告)号：US06973269B1
公开(公告)日：2005-12-06
申请号：US09978581
申请日：2001-10-18
申请人： David M. Britz , Matthew J. Sherman , Jeevan P. Dodley
发明人： David M. Britz , Matthew J. Sherman , Jeevan P. Dodley
IPC分类号： H04J14/00 , H04J14/02 , H04L12/28 , H04L12/56 , H04Q11/00
CPC分类号： H04J14/0283 , H04J14/0227 , H04J14/0228 , H04J14/0241 , H04J14/0284 , H04J14/0286 , H04Q11/0067 , H04Q2011/0073 , H04W40/02
摘要： An architecture for facilitating wavelength-specific and packet-switched routing comprises a primary metropolitan fiber ring, a primary distribution/aggregation node in the primary metropolitan fiber ring and a local service domain further comprising a secondary aggregation node in communication with the primary distribution/aggregation node. A network to provide local metropolitan switching and routing and broadband local access distribution described in terms of its component layers comprises a distribution/aggregation routing layer that interfaces with a primary fiber metropolitan ring and a local customer primary distribution/aggregation node via transport branches of a mesh architecture, a local distribution and routing layer that routes specific wavelengths and newly assigned wavelengths to and from a customer's premises and a cross-connect layer that handles customer specific wavelength and packet routing via one of fiber, millimeter wave radio and free space optical communications.
摘要翻译：用于促进波长特定和分组交换路由的架构包括主要城域光纤环，主城域光纤环中的主要分布/聚合节点和还包括与主要分布/聚合通信的辅助聚合节点的本地服务域节点。提供本地大都市交换和路由以及其组件层描述的宽带本地访问分配的网络包括分布/聚合路由层，其通过传输分支与主要光纤城域环和本地客户主分布/聚合节点进行接口网格架构，本地分布和路由层，其将特定波长和新分配的波长路由到客户的场所，以及交叉连接层，其通过光纤，毫米波无线电和自由空间光通信中的一个处理客户特定的波长和分组路由。

26. 发明授权

US06427038B1 Mirror control of micro-electro-mechanical optical cross connect switch 有权
标题翻译：微机电光学交叉连接开关的镜面控制
公开(公告)号：US06427038B1
公开(公告)日：2002-07-30
申请号：US09639635
申请日：2000-08-15
申请人： David M. Britz , Jeevan Prakash Dodley
发明人： David M. Britz , Jeevan Prakash Dodley
IPC分类号： G02B626
CPC分类号： G02B6/3588 , G02B6/29311 , G02B6/29395 , G02B6/3518 , G02B6/3546 , G02B6/356 , G02B6/3586 , G02B2006/12104
摘要： An optical switch includes an input optical fiber, an output optical fiber and a mirror that is either inclinable or rotatable or both and reflects a lightwave signal from the input optical fiber into the output optical fiber. The switch further includes a control circuit to sense a misalignment error and to adjust the mirror to correct the misalignment error. The misalignment error may be either an inclination misalignment error, a rotation misalignment error or both. In an alternative embodiment, an optical switch includes an input optical fiber that includes an input core and an input cladding, an output optical fiber that includes an output core and an output cladding, an input GRISM to insert a calibration signal into the input cladding and a mirror that is adjustable. The mirror reflects a lightwave signal from the input core into the output core and reflects the calibration signal from the input cladding into the output cladding. The optical switch further includes an output GRISM to extract the calibration signal from the output cladding and a control circuit to sense a misalignment error based on the extracted calibration signal. The misalignment error includes an inclination misalignment error or a rotation misalignment error or both. The control circuit includes circuitry to adjust the mirror to correct the misalignment error. In an alternative embodiment, an optical switch includes an input optical fiber, an output optical fiber and a rotatable mirror that has diffraction gratings etched thereon. The mirror reflects a lightwave signal from the input optical fiber into the output optical fiber. The optical switch further includes a control circuit to adjust a rotation angle of the mirror to select a wavelength that can be diffracted into the output optical fiber according to a spacing of the diffraction gratings.
摘要翻译：光开关包括输入光纤，输出光纤和可倾斜或可旋转的两者的反射镜，并将来自输入光纤的光波信号反射到输出光纤中。开关还包括用于感测不对准误差的控制电路，并且调整反射镜以校正不对准误差。不对准误差可能是倾斜失准误差，旋转失准误差或两者。在替代实施例中，光开关包括输入光纤，其包括输入芯和输入包层，包括输出芯和输出包层的输出光纤，输入GRISM以将校准信号插入到输入包层中，以及一个可调的镜子。反射镜将来自输入核心的光波信号反射到输出核心，并将来自输入包层的校准信号反射到输出包层中。光开关还包括输出GRISM以从输出包层提取校准信号，以及控制电路，用于基于所提取的校准信号感测到未对准误差。不对准误差包括倾斜失准误差或旋转失准误差或两者。控制电路包括调整反射镜以校正不对准误差的电路。在替代实施例中，光开关包括输入光纤，输出光纤和在其上刻蚀衍射光栅的可旋转镜。反射镜将来自输入光纤的光波信号反射成输出光纤。光开关还包括控制电路，用于调节反射镜的旋转角度，以根据衍射光栅的间隔选择可衍射成输出光纤的波长。

27. 外观设计

USD293440S Housing for handset base of transaction telephone or similar article 失效
公开(公告)号：USD293440S
公开(公告)日：1987-12-29
申请号：US14392
申请日：1987-02-13
申请人： David M. Britz
设计人： David M. Britz

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式