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公开(公告)号：US6122084A
公开(公告)日：2000-09-19
申请号：US33236
申请日：1998-03-03
IPC分类号： H04B10/077 , H04B10/112 , H04B10/00 , H04B10/06
CPC分类号： H04B10/0775 , H04B10/1121 , H04B2210/075 , H04B2210/078
摘要： A free-space optical communications system and method in which a transmitter transmits a free-space optical communication beam to an optical receiver. The receiver includes an optical detector, an optical input level sensor and an optical attenuation device. The optical detector detects the optical communication beam, while the optical input level sensor senses an optical input level of the optical communication beam at the optical detector and outputs a control signal corresponding to the sensed optical input level. The optical attenuation device is responsive to the control signal by attenuating the optical input level of the optical communication beam to be less than a predetermined input level. The optical input level sensor includes a detector optical level sensor, a comparator circuit and a controller. The detector bias level sensor senses an optical level of the optical detector. The comparator circuit is coupled to the detector bias level sensor and compares the sensed optical level of the optical detector to predetermined threshold levels. The comparator circuit outputs a code signal relating a magnitude of the sensed optical level of the optical detector to the predetermined thresholds. The controller is responsive to the code signal by outputting the control signal.
摘要翻译： 一种自由空间光通信系统和方法，其中发射机将自由空间光通信波束发射到光接收机。 接收机包括光检测器，光输入电平传感器和光衰减器件。 光学检测器检测光通信光束，而光输入电平传感器感测光学检测器处的光通信光束的光输入电平，并输出对应于感测的光输入电平的控制信号。 光衰减装置通过将光通信光束的光输入电平衰减到小于预定输入电平来响应于控制信号。 光输入电平传感器包括检测器光学电平传感器，比较器电路和控制器。 检测器偏置电平传感器感测光学检测器的光学水平。 比较器电路耦合到检测器偏置电平传感器，并将感测到的光学检测器的光学水平与预定阈值电平进行比较。 比较器电路将与检测到的光检测器的光电平的大小相关联的代码信号输出到预定阈值。 控制器通过输出控制信号来响应于代码信号。
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公开(公告)号：US06417947B1
公开(公告)日：2002-07-09
申请号：US09414138
申请日：1999-10-07
IPC分类号： H04B1000
CPC分类号： H04B10/11
摘要： A free space light multibeam network bridge apparatus receives free space light beam communication signals from free space light communication devices and routes the free space light beam communication signals to other free space light communication devices via a free space light network or to non-free space light destination devices via a telecommunications network. The free space light multibeam network bridge apparatus identifies the source of a free space light beam communication signal based on the position of the free space light beam communication signal on a sensor.
摘要翻译： 自由空间光多波束网桥装置从自由空间光通信装置接收自由空间光束通信信号，并且通过自由空间光网络将自由空间光束通信信号路由到其他自由空间光通信装置或非自由空间光 目的地设备通过电信网络。 自由空间光多波束网桥装置基于传感器上的自由空间光束通信信号的位置来识别自由空间光束通信信号的源。
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公开(公告)号：US06804226B1
公开(公告)日：2004-10-12
申请号：US09270407
申请日：1999-03-16
IPC分类号： H04L1228
CPC分类号： H04L12/2872 , H04L12/2856 , H04L12/4616 , H04M11/062
摘要： The present invention provides a method and apparatus for allowing the copper pair at each subscriber site to reappear at the CO. It also provides inter-connectivity between subscribers within a specified proximity, thereby allowing the subscribers to operate as a LAN. By placing a router between various Distributed Point of Presence Local Area Networks (DPOPLAN) and service provider that offer services such as Internet access, a large communication can easily be created.
摘要翻译： 本发明提供了一种用于允许每个用户站点处的铜对重新出现在CO处的方法和装置，还提供了在指定接近度内的用户之间的互连，从而允许用户作为LAN来操作。 通过在各种分布式现场局域网（DPOPLAN）和提供互联网等服务的服务提供商之间放置路由器，可以轻松创建大型通信。
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公开(公告)号：US06381055B1
公开(公告)日：2002-04-30
申请号：US09061534
申请日：1998-04-16
IPC分类号： H04B1000
CPC分类号： H04B10/1123
摘要： Methods and apparatus for safe and reliable telecommunication using a telecommunication network that employs substantially unguided, free-space, point-to-point, electro-magnetic radiation are provided. Most methods include the use of a retro-reflector near a transceiver assembly. The retro-reflector can be used to rapidly calibrate, align, and/or realign one or more assemblies by reflecting a beam of light back toward its source, providing an opportunity for optical detection of the reflected beam.
摘要翻译： 提供了使用基本上无引导，自由空间的点对点电磁辐射的电信网络进行安全可靠的通信的方法和装置。 大多数方法包括在收发器组件附近使用回射反射器。 逆反射器可用于通过将光束反射回其源来快速校准，对准和/或重新对准一个或多个组件，为反射光束的光学检测提供了机会。
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