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    • 1. 发明授权
    • Photonic switch employing shared data transmission facility
    • 光子交换机采用共享数据传输设备
    • US5073980A
    • 1991-12-17
    • US399852
    • 1989-08-29
    • Paul R. PrucnalPhilippe A. Perrier
    • Paul R. PrucnalPhilippe A. Perrier
    • H04J14/08H04Q11/00
    • H04J14/08H04Q11/0001H04Q11/0066
    • An optical message distribution system is described which includes both a plurality of message sources and destinations. Each optical message includes a destination address portion and a data portion containing data signals. At a message source, an encoder generates, for each data signal of one kind, an optical pulse whose time position relative to a frame is indicative of a message destination address. An optical summer, common to all message sources combines the optical pulses onto an optical transmission medium and transmits them to an optical decoder associated with the each message destination. Each optical decoder determines if the time position of a received optical pulse relative to the frame is equal to a preset time delay, and if so, generates a data pulse of the one kind for the message destination.
    • 描述了包括多个消息源和目的地的光消息分发系统。 每个光学消息包括目的地地址部分和包含数据信号的数据部分。 在消息源处,对于每种数据信号,编码器产生其相对于帧的时间位置指示消息目的地地址的光脉冲。 所有信息源共同的光学夏天将光脉冲组合到光传输介质上,并将其发送到与每个消息目的地相关联的光学解码器。 每个光学解码器确定接收的光脉冲相对于帧的时间位置是否等于预设的时间延迟,如果是,则为消息目的地生成一种数据脉冲。
    • 2. 发明授权
    • Self clocked, self routed photonic switch
    • 自定时自动路由光子开关
    • US5060305A
    • 1991-10-22
    • US399922
    • 1989-08-29
    • Paul R. PrucnalPhilippe A. Perrier
    • Paul R. PrucnalPhilippe A. Perrier
    • H04Q11/00
    • H04Q11/0001H04Q11/0066
    • An optical communication system is described wherein a message pathway is indicated by a destination address, manifested by an address time interval between a reference optical signal and an address optical signal. The optical communication system includes an optical switch for directing messages onto selected pathways. The switch includes a gate summer, and a reference circuit for applying a destination address portion of a message to the gate summer. A first delay circuit also applies the address portion of the message to the gating summer, while retarding it by a first address time interval. The gate summer sums the address portion from the reference circuit and the retarded address portion to produce a gating signal when the reference optical signal and address optical signal are time coincident. Switch means are further provided which are responsive to the gating signal to direct the message along a first selected pathway.
    • 描述了一种光通信系统,其中消息路径由目的地址指示,由参考光信号和地址光信号之间的地址时间间隔表现。 光通信系统包括用于将消息引导到所选择的路径上的光学开关。 开关包括门极加法器,以及用于将消息的目的地地址部分应用于门极夏天的参考电路。 第一延迟电路还将消息的地址部分应用于门控加法器,同时将其延迟第一地址时间间隔。 当参考光信号和地址光信号是时间一致时,门加法器将来自参考电路和延迟地址部分的地址部分相加以产生选通信号。 进一步提供了开关装置,其响应门控信号以沿着第一选择的路径引导消息。
    • 3. 发明授权
    • Alternate mark/space inversion line code
    • 替代标记/空间反转代码
    • US4791407A
    • 1988-12-13
    • US81235
    • 1987-08-04
    • Paul R. PrucnalPhilippe A. Perrier
    • Paul R. PrucnalPhilippe A. Perrier
    • H03M5/14H04J14/02H03M5/04
    • H03M5/14H04J14/02
    • A communication system and method for transmitting information in the form of binary digital data to be transmitted is encoded into two separate two level sequences S1 and S2 such that the first occurrence of a logic "1" is encoded into the same level in both sequences and each subsequent occurrence of a logic "1" is encoded into the level opposite of the previous level representing a logic "1" in each of the sequences S1 and S2, and the first occurrence of a logic "0" is encoded into opposite levels in sequences S1 and S2 and every subsequent occurrence of a logic "0" is encoded into the level opposite of the previous level representing a logic "0" in each of the sequences S1 and S2. The two encoded streams drive optical signal producing means of respectively different wavelengths and the two optical signals are transmitted over a wavelength-multiplexed fiber-optic link. The receiving end of the link electro-optically converts the transmitted optical signals into electrical streams which are decoded using simple logic gates which extract both the original data and the synchronization clock digitally and without regard to the transmission rate.
    • 用于发送要发送的二进制数字数据形式的信息的通信系统和方法被编码为两个单独的两个级别序列S1和S2,使得逻辑“1”的第一次出现被编码成两个序列中的相同级别, 每个随后的逻辑“1”的发生被编码成与序列S1和S2中的每一个中表示逻辑“1”的先前等级相反的电平,并且逻辑“0”的第一次出现被编码为相反的电平 序列S1和S2以及逻辑“0”的每个后续出现被编码为在序列S1和S2中的每一个中表示逻辑“0”的先前级别相反的电平。 两个编码流驱动分别不同波长的光信号产生装置,并且两个光信号通过波分复用光纤链路传输。 链路的接收端将传输的光信号电光转换成电流,其使用简单逻辑门进行解码,该逻辑门以数字方式提取原始数据和同步时钟,而不考虑传输速率。