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    • 46. 发明授权
    • Optical shunt device
    • 光学分支器件
    • US5133031A
    • 1992-07-21
    • US465230
    • 1990-02-22
    • Toshiyasu TanakaToyohiro KobayashiShouji Mukohara
    • Toshiyasu TanakaToyohiro KobayashiShouji Mukohara
    • G02B6/28G02B6/35G02B6/42H04B20060101H04B10/27H04B10/278
    • G02B6/2804G02B6/28G02B6/4246H04B10/271H04B10/278G02B6/3562
    • An optical shunt device in which a pair of connecting ends (22, 23) for being connected to optical communication fiber sections (11) are divided into three systems. The first of the three systems is a passing-through light conduction path (19) through which light signals in two opposite directions are allowed to pass through between the connecting ends. The second of the three systems is a receiving light conduction path (20) having a first light-receiving end (20a) and a second light-receiving end (20b) each receiving a light signal from the connecting ends (22, 23). The third light path (21) has a first light-transmitting end (21a) and a second light-transmitting end (21b) each transmitting a light signal to the connecting ends. The optical shunt device also comprises a photo-electric conversion unit (B) including a light-receiving element (13) disposed at the first and second light-receiving ends (20a, 20b) for receiving a light signal from the first light-receiving end (20a) and the second light-receiving end (20b) of the second light path (20) and converting it into an electric signal, an amplifier circuit (14) for amplifying the electric signal from the light-receiving element (13), and a light-emitting element (17) disposed at the first and second light-transmitting ends (21a, 21b) for converting the electric signal into an optical signal to supply the optical signal to the first and second light-transmitting ends.
    • PCT No.PCT / JP89 / 00702 Sec。 371日期1990年2月22日 102(e)日期1990年2月22日PCT提交1989年7月12日PCT公布。 公开号WO90 / 00838 日期:1990年1月25日。一种光分路装置,其中连接到光通信光纤段(11)的一对连接端(22,23)被分成三个系统。 三个系统中的第一个是通过光导通路径(19),允许在两个相反方向上的光信号通过该导通路径在连接端之间通过。 三个系统中的第二个是具有第一光接收端(20a)和第二光接收端(20b)的接收光传导路径(20),每个接收端都接收来自连接端(22,23)的光信号。 第三光路(21)具有向连接端发送光信号的第一透光端(21a)和第二透光端(21b)。 光分路装置还包括光电转换单元(B),其包括设置在第一和第二光接收端(20a,20b)处的光接收元件(13),用于接收来自第一光接收的光信号 第二光路(20)的端部(20a)和第二光接收端(20b),并将其转换成电信号;放大电路(14),用于放大来自光接收元件(13)的电信号; 以及设置在第一和第二光透射端(21a,21b)处的发光元件(17),用于将电信号转换为光信号,以将光信号提供给第一和第二光发射端。
    • 47. 发明授权
    • Photonic array bus for data processing and communication systems
    • 用于数据处理和通信系统的光子阵列总线
    • US5023463A
    • 1991-06-11
    • US493952
    • 1990-03-15
    • John D. BoardmanJimmie L. SadlerRichard A. Trimble
    • John D. BoardmanJimmie L. SadlerRichard A. Trimble
    • H04B10/00H04B10/213
    • H04B10/278H04B10/801
    • A photonic array bus provides a connectorless, computer backplane-like communication systems for advanced data processing and communications systems requiring operation rates exceeding 1 gigahertz. Components of a multiple component advanced data processing or communications system are coupled to pairs of laser transmitters and laser receivers. The laser transmitter and receiver pairs are arrayed in a coplanar circular fashion about a central disperser lens. A laser transmitter emits a laser beam incident on the central disperser lens. The central disperser lens disperses the laser beam into a coplanar array of laser beams illuminating the laser receivers. Multiple channel operation is achieved by "stacking" along the length of the disperser lens coplanar arrays of pairs of laser transmitters and receivers.
    • 光子阵列总线为高级数据处理和需要超过1千兆赫兹的运行速率的通信系统提供无连接器的计算机背板式通信系统。 多组件高级数据处理或通信系统的组件耦合到成对的激光发射器和激光接收器。 激光发射器和接收器对以关于中心分散透镜的共面圆形方式排列。 激光发射器发射入射在中心分散透镜上的激光束。 中心分散透镜将激光束分散成照射激光接收器的激光束的共面阵列。 通过沿分散透镜共面阵列的激光发射器和接收器的长度“堆叠”来实现多通道操作。
    • 49. 发明授权
    • Multi-star fiber optic network with improved access time
    • 多星光纤网络具有改进的访问时间
    • US4654889A
    • 1987-03-31
    • US698332
    • 1985-02-05
    • Harold B. Shutterly
    • Harold B. Shutterly
    • H04B10/00H04B10/20H04B9/00
    • H04B10/278H04B10/27H04B10/271H04B10/272
    • A multi-star fiber optic network achieves improved access periods by grouping terminal devices into subnetworks that are connected to a bus, with token passing or collision detection being localized to individual subnetworks and with communication between subnetworks being conducted over the bus via non-interfering optical channels. The optical channels may be obtained by using light sources having different wavelengths or by modulating light at different channel frequencies. Each subnetwork includes an N-to-1 star which receives optical signals from terminal devices in the subnetwork and 1-to-N star which distributes optical signals to terminal devices in the subnetwork. Each subnetwork also includes a transmit repeater connected between the N-to-1 star and the bus to transmit messages which are addressed to other subnetworks on a unique channel, and a receive repeater connected between the bus and the 1-to-N star to receive messages on the channels assigned to other subnetworks. An electrical signal path connects the transmit repeater of a subnetwork with the receive repeater thereof to provide a signal path which does not utilize the bus. A buffer memory within the receive repeater of each subnetwork temporarily stores messages for subsequent distribution within the subnetwork. In order to avoid overloading any particular subnetwork when a token passing protocol is employed, for example, other subnetworks temporarily delay passage of the token when an outgoing message is generated. During this temporary delay messages stored in the buffer of the receive repeater are distributed.
    • 多星光纤网络通过将终端设备分组到连接到总线的子网络来实现改进的接入周期,令牌通过或冲突检测被定位到各个子网络,并且子网络之间的通信通过总线经由非干扰光学 频道 可以通过使用具有不同波长的光源或通过调制不同信道频率的光来获得光信道。 每个子网包括N到1星,其接收来自子网中的终端设备的光信号和将光信号分配到子网中的终端设备的1对N星。 每个子网络还包括连接在N到1星和总线之间的发射中继器,以发送寻址到唯一信道上的其他子网络的消息,以及连接在总线与1对N星之间的接收转发器 在分配给其他子网络的频道上接收消息。 电信号路径将子网的发射中继器与其接收转发器连接,以提供不利用总线的信号路径。 每个子网络的接收中继器内的缓冲存储器临时存储用于后续分发在子网内的消息。 为了避免在采用令牌通过协议时超载任何特定子网,例如,当产生传出消息时,其他子网络暂时延迟令牌的通过。 在该暂时延迟期间,存储在接收中继器的缓冲器中的消息被分发。
    • 50. 发明授权
    • Local area network
    • 局域网
    • US4641375A
    • 1987-02-03
    • US708995
    • 1985-03-07
    • Andrew Dean
    • Andrew Dean
    • H04B10/272H04L12/44H04B9/00H04J1/02
    • H04B10/278H04L12/44
    • In a local area network (LAN), of the Ethernet type, one of the segments, i.e. one bus, is replaced by a star coupler connected via optical fibre pairs to a number of stations. Each pair includes a GO fibre and a RETURN fibre. As in the usual Ethernet system, collision detection relies on measuring signal level on the medium, if it is too large then a collision condition exists.In an optical fibre system a similar collision detection technique is used. To detect collision, it is nescessary to be aware of the network's attenuation as "seen" by the station. To do this a low level pilot tone is sent from each station, each station having its own tone frequency. The amplitude of this tone when it returns to its own station indicates the system's attenuation, and this is used to detect collision.In an alternative the pilot signals are pseudo-random bit sequences.
    • 在以太网类型的局域网(LAN)中,其中一个段(即一个总线)由通过光纤对连接到多个站的星形耦合器代替。 每对包括GO光纤和RETURN光纤。 如通常的以太网系统一样,碰撞检测依赖于介质上的测量信号电平,如果它太大,则存在碰撞条件。 在光纤系统中,使用类似的碰撞检测技术。 为了检测到碰撞,需要了解网络的“衰减”,这是“站”看到的。 为了做到这一点,从每个站发送一个低电平的导频音,每个电台都有自己的音频。 当它返回到自己的站时,该音调的幅度指示系统的衰减,并且这用于检测碰撞。 在替代方案中,导频信号是伪随机比特序列。