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    Optical communication system
    1.
    发明授权
    Optical communication system 失效
    光通信系统

    公开(公告)号：US5793512A

    公开(公告)日：1998-08-11

    申请号：US592862

    申请日：1996-01-24

    申请人： Shiro Ryu

    发明人： Shiro Ryu

    IPC分类号： H04B10/2507 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/2563 ,  H04B10/508 ,  H04B10/548 ,  H04B10/58 ,  H04B10/02

    CPC分类号： H04B10/2935

    摘要： An optical communication system in which the degradation of the signal-to-noise-ratio during transmission is alleviated. An optical signal from an optical transmitter is propagated over a transmission line comprising optical fibers and optical amplifiers, and received by an optical receiver. The signal-to-noise ratio is improved by inserting an injection-locked laser device at a specified point on the optical transmission line, improving the transmission characteristics of the optical communication system.

    摘要翻译： 其中减轻了传输期间信噪比的恶化的光通信系统。 来自光发射机的光信号在包括光纤和光放大器的传输线上传播并由光接收机接收。 通过在光传输线上的指定点插入注入锁定的激光装置来提高信噪比，提高光通信系统的传输特性。

    Line monitoring method and line monitoring apparatus
    2.
    发明授权
    Line monitoring method and line monitoring apparatus 失效
    线路监控方法和线路监控装置

    公开(公告)号：US5790294A

    公开(公告)日：1998-08-04

    申请号：US617615

    申请日：1996-03-19

    申请人： Yukio Horiuchi ,  Shu Yamamoto ,  Shigeyuki Akiba

    发明人： Yukio Horiuchi ,  Shu Yamamoto ,  Shigeyuki Akiba

    IPC分类号： H04J14/00 ,  H04B3/46 ,  H04B10/07 ,  H04B10/077 ,  H04B10/079 ,  H04B10/16 ,  H04B10/2563 ,  H04B10/29 ,  H04B10/294 ,  H04B10/297 ,  H04B10/54 ,  H04B10/548 ,  H04B10/564 ,  H04B10/572 ,  H04J14/02 ,  H04B10/02

    CPC分类号： H04B10/035 ,  H04B10/07 ,  H04B10/077 ,  H04B2210/074 ,  H04B2210/077 ,  H04B2210/078

    摘要： A line monitoring apparatus which features a simple configuration is capable of quickly detecting a position where a failure has occurred. A main track signal on an up-stream optical transmission path is set for a different wavelength from that on a down-stream optical transmission path, so that the wavelength of loopback signals fed back from repeaters does not overlap the wavelength of the main track signals transmitted from a transmitting terminal station. This makes it possible to separate the main track signals and the loopback signals by using dividing circuits at receiving terminal stations. In addition, the level of the separated loopback signals can be set higher than that in the past; therefore, a monitoring signal can be quickly detected in the loopback signal.

    摘要翻译： 具有简单配置的线路监视装置能够快速检测发生故障的位置。 上游光传输路径上的主轨道信号被设置为与下行光传输路径上不同的波长，使得从中继器反馈的环回信号的波长不与主轨道信号的波长重叠 从发送终端发送。 这使得可以通过在接收终端站处使用分频电路来分离主轨道信号和环回信号。 另外，分离的环回信号的电平可以设置得比以前更高; 因此，可以在环回信号中快速检测出监视信号。

    Wavelength division multiplexed optical fiber transmission equipment
    6.
    发明授权
    Wavelength division multiplexed optical fiber transmission equipment 失效
    波分复用光纤传输设备

    公开(公告)号：US5589969A

    公开(公告)日：1996-12-31

    申请号：US542058

    申请日：1995-10-12

    申请人： Hidenori Taga ,  Noboru Edagawa ,  Noriyuki Takeda ,  Shu Yamamoto ,  Shigeyuki Akiba

    发明人： Hidenori Taga ,  Noboru Edagawa ,  Noriyuki Takeda ,  Shu Yamamoto ,  Shigeyuki Akiba

    IPC分类号： H04J14/00 ,  H04B10/2507 ,  H04B10/2563 ,  H04J14/02

    CPC分类号： H04B10/2572 ,  H04J14/0224

    摘要： The present invention provides a wavelength division multiplexed optical fiber transmission equipment which can increase the number of channels of the WDM signal by reducing a required bandwidth of optical signals while suppressing an interference between signals caused by four-wave mixing. A WDM optical transmitting terminal comprises five or more optical transmitters and the wavelengths of optical signals from the optical transmitters are set such that the spacing between the wavelengths of two signals is re-used as the spacing between the wavelengths of other two signals separated by the above signals by two or more waves and there is no periodicity in the channel spacing s. For instance, the wavelengths of the optical signals are set as shown in FIG. 1. As the result, deterioration in the transmission characteristics of the optical signals can be effectively reduced and, at the same time, the maximum number of channels of the WDM signal can be increased. To the WDM optical transmitting terminal is added polarization state controllers for controlling the state of polarization such that the states of polarizations of adjacent signals cross each other at an output of the WDM optical transmitting terminal.

    摘要翻译： 本发明提供一种波分复用光纤传输设备，其可以通过减少光信号的所需带宽，同时抑制由四波混频引起的信号之间的干扰，从而增加WDM信号的信道数。 WDM光发射终端包括五个或更多个光发射机，并且来自光发射机的光信号的波长被设置为使得两个信号的波长之间的间隔被重新使用为由其间隔开的其它两个信号的波长之间的间隔 上述信号由两个或更多个波，并且在信道间隔s中没有周期性。 例如，光信号的波长如图5所示设定。 结果，可以有效地降低光信号的传输特性的劣化，并且同时可以增加WDM信号的最大信道数。 对于WDM光发射终端，增加了用于控制极化状态的偏振状态控制器，使得相邻信号的偏振状态在WDM光发送终端的输出端彼此交叉。

    Wavelength division multiplexed optical fiber transmission equiptment
    7.
    发明授权
    Wavelength division multiplexed optical fiber transmission equiptment 失效
    波分复用光纤传输

    公开(公告)号：US5559910A

    公开(公告)日：1996-09-24

    申请号：US452028

    申请日：1995-05-26

    申请人： Hidenori Taga ,  Noboru Edagawa ,  Shu Yamamoto ,  Noriyuki Takeda ,  Shigeyuki Akiba

    发明人： Hidenori Taga ,  Noboru Edagawa ,  Shu Yamamoto ,  Noriyuki Takeda ,  Shigeyuki Akiba

    IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/2563 ,  G02B6/28

    CPC分类号： H04B10/25253 ,  H04B10/2563

    摘要： It is the object of the present invention to optimize the degradation due to the four-wave mixing of wavelength multiplexed signals and the distortion due to the chromatic dispersion, thereby to provide a wavelength division multiplexed optical fiber transmission equipment having good transmission characteristics. A WDM transmitting terminal consists of four transmitters of channels 1 to 4, and a wavelength-division multiplexer. Further, a WDM receiving terminal consists of an equalization optical fiber, a wavelength-division demultiplexer, and four receivers of the channels 1 to 4. The WDM transmitting terminal and the WDM receiving terminal are interconnected by transmission optical fibers and an optical amplifier. The equipment is designed so that the wavelengths .lambda..sub.1, .lambda..sub.2, .lambda..sub.3 and .lambda..sub.4 of the optical signals output from the transmitters all lie on the short-wavelength side with respect to the average zero-dispersion wavelength .lambda..sub.0. This allows the distortion due to the four-wave mixing of a wavelength multiplexed signal to be reduced. The equalization optical fiber has a chromatic dispersion of a sign opposite to the chromatic dispersion of the optical fibers forming a transmitting path, thereby for compensating the chromatic dispersion of the optical signals output from the transmitters.

    摘要翻译： 本发明的目的是优化由于波分复用信号的四波混频和由于色散导致的失真的劣化，从而提供具有良好传输特性的波分复用光纤传输设备。 WDM发射终端由通道1至4的四个发射器和波分复用器组成。 此外，WDM接收终端由均衡光纤，波分多路分解器，以及通道1〜4的4个接收器构成.WDM发送终端和WDM接收终端由发送光纤和光放大器互连。 设备的设计使得从发射机输出的光信号的波长λ1，λ2，λ3和λ4相对于平均零色散波长λ0位于短波长侧。这允许 由于要减少的波长复用信号的四波混频引起的失真。 均衡光纤具有与形成发送路径的光纤的色散相反的符号的色散，从而补偿从发送器输出的光信号的色散。

    Photonic integrated circuit (PIC) radio frequency signal correlator
    9.
    发明授权
    Photonic integrated circuit (PIC) radio frequency signal correlator 有权

    公开(公告)号：US11888520B2

    公开(公告)日：2024-01-30

    申请号：US17843992

    申请日：2022-06-18

    申请人： Raytheon BBN Technologies, Corp.

    发明人： Moe D. Soltani ,  Ken Dinndorf

    IPC分类号： H04B10/00 ,  H04B10/2563 ,  G01S13/44

    CPC分类号： H04B10/2563 ,  G01S13/4409 ,  H04B2210/006

    摘要： A technology is described for a Photonic Integrated Circuit (PIC) radio frequency (RF) correlator. The PIC RF Correlator can comprise two optical waveguides to receive first and second optical signals that are modulated by first and second RF signals, respectively. Two 1 to M optical splitters can split the first and second RF modulated optical signals. Optical delay lines can delay the M split first RF modulated optical signals. M optical balanced couplers can receive and combine the M first delayed RF modulated optical signals with the M split second RF modulated optical signals. Balanced photodetectors can output a differential integration on the first and second combined RF modulated optical signals. A processor can add the outputs of the M optical balanced photodetectors to form a frequency domain correlated signal of the first and second RF signals.

    Photonic Integrated Circuit (PIC) Radio Frequency Signal Correlator
    10.
    发明公开
    Photonic Integrated Circuit (PIC) Radio Frequency Signal Correlator 审中-公开

    公开(公告)号：US20230412270A1

    公开(公告)日：2023-12-21

    申请号：US17843992

    申请日：2022-06-18

    申请人： Raytheon BBN Technologies, Corp.

    发明人： Moe D. Soltani ,  Ken Dinndorf

    IPC分类号： H04B10/2563 ,  G01S13/44

    CPC分类号： H04B10/2563 ,  H04B2210/006 ,  G01S13/4409

    摘要： A technology is described for a Photonic Integrated Circuit (PIC) radio frequency (RF) correlator. The PIC RF Correlator can comprise two optical waveguides to receive first and second optical signals that are modulated by first and second RF signals, respectively. Two 1 to M optical splitters can split the first and second RF modulated optical signals. Optical delay lines can delay the M split first RF modulated optical signals. M optical balanced couplers can receive and combine the M first delayed RF modulated optical signals with the M split second RF modulated optical signals. Balanced photodetectors can output a differential integration on the first and second combined RF modulated optical signals. A processor can add the outputs of the M optical balanced photodetectors to form a frequency domain correlated signal of the first and second RF signals.